Merge pull request 'Added Bitwise Operations' (#2) from dev into master

Reviewed-on: #2

.gitignore

@@ -3,6 +3,9 @@ desktop.ini
 elm-stuff/*
 out/js/elm.js
 *.zip
+*.tar.gz
 
 *.sublime*
 
+notes.txt
+

LICENSE

@@ -0,0 +1,674 @@
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+PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
+IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
+ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+  16. Limitation of Liability.
+
+  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+  17. Interpretation of Sections 15 and 16.
+
+  If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+  If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+    <program>  Copyright (C) <year>  <name of author>
+    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+<https://www.gnu.org/licenses/>.
+
+  The GNU General Public License does not permit incorporating your program
+into proprietary programs.  If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.  But first, please read
+<https://www.gnu.org/licenses/why-not-lgpl.html>.

README.md

@@ -0,0 +1,9 @@
+# Johnny
+
+This is a simple simualtion of a computer. It allows to get an understanding of what microcode
+in modern CPUs is and what they do.
+
+This is a modernised version of [Johnny Simulator](https://sourceforge.net/projects/johnnysimulator),
+but it uses new code completly.
+
+[See it in action at yokta.de/johnny](https://yokta.de/johnny/)

out/css/pc.css

@@ -63,8 +63,10 @@
     height: 2.5em;
     line-height: 1em;
     margin: 0;
+    margin-bottom: .5em;
     vertical-align: top;
     padding: 0.25em 2em;
+    font-size: 0.75em;
 }
 
 /* CONTROLS COLORS */
@@ -267,11 +269,20 @@ th.address {
 }
 
 .pc input[type=number].instruction {
-    width: 4em !important;
+    width: 4.5em !important;
+    margin-left: auto;
+    margin-right: 0;
 }
 
 .pc input[type=number].address {
-    width: 5em !important;
+    width: 6em !important;
+}
+
+.pc .cu input[type=number].address {
+    width: 100% !important;
+    align-self: end;
+    margin-left: auto;
+    margin-right: 0;
 }
 
 
@@ -383,6 +394,13 @@ th.address {
     width: 100%;
 }
 
+.pc .cu .action-area {
+    display: grid;
+    grid-template-columns: 1fr min-content 0.5fr;
+    grid-row-gap: 0.5em;
+    grid-column-gap: 0.5em;
+}
+
 .pc .cu .input-row {
     display: flex;
     justify-content: space-between;
@@ -401,7 +419,7 @@ th.address {
 }
 
 .pc .cu input[type=number] {
-    width: 9.5em;
+    width: 100%;
 }
 
 .pc .cu label {
@@ -441,6 +459,7 @@ th.address {
     color: var(--color-cu-text);
     border-color: var(--color-cu-text);
     background-color: transparent;
+    margin-bottom: 0;
 }
 
 .pc .modal .download-button {
@@ -469,6 +488,10 @@ th.address {
     background-color: transparent;
 }
 
+.pc .alu input {
+    width: 100%;
+}
+
 .pc .alu button {
     margin-right: 1em;
 }
@@ -477,6 +500,16 @@ th.address {
     margin-right: 0;
 }
 
+.pc .alu .button-group-alu__2-elements {
+    display: grid;
+    grid-template-columns: 1fr 1fr;
+}
+
+.pc .alu .button-group-alu__4-elements {
+    display: grid;
+    grid-template-columns: 1fr 1fr 1fr 1fr;
+}
+
 /* BUSSES */
 
 .pc .databus,
@@ -507,7 +540,7 @@ th.address {
 }
 
 .pc .addressbus {
-    margin-bottom: 1em;
+    margin-bottom: 2em;
 
     background-color: var(--color-addressbus);
     color: var(--color-addressbus-text);
@@ -521,46 +554,101 @@ th.address {
 }
 
 /* ARROWS */
-.pc .arrow {
+.pc .arrow-line {
-    position: absolute;
+    display: flex;
-    bottom: 0;
+    justify-content: space-around;
-    left: 50%;
 
+    height: 0;
+    width: 100%;
+}
+
+.pc .arrow {
+    width: 3rem;
+    height: 5rem;
+
+    --transformation: translate(0, -2rem);
+    transform: var(--transformation);
+    -moz-transform: var(--transformation);
+    -webkit-transform: var(--transformation);
+    -o-transform: var(--transformation);
+
+    color: var(--color-arrow-text);
+    background-color: var(--color-arrow);
+
+    /* Arrow Label */
     display: flex;
     justify-content: center;
     align-items: center;
 
-    width: 3rem;
-    height: 5rem;
-
-    /* transform: rotate(90deg) translate(1.5rem, 2.5rem) ; */
-    --transformation: translate(0, 3rem);
-    transform: var(--transformation);
-    -moz-transform: var(--transformation);
-    -webkit-transform: var(--transformation);
-    -o-transform: var(--transformation);
-
     z-index: 100;
-
-    font-size: 0.5em;
-    color: var(--color-arrow-text);
-    background-color: var(--color-arrow);
 }
 
-.pc .arrow.down {
+.pc .arrow > :nth-child(1) {
-    left: 25%;
+    /* Arrow Label Field */
+    color: var(--color-arrow-text) !important;
+    background-color: var(--color-arrow) !important;
+    border-color: var(--color-arrow-text) !important;
+
+    
+    padding: 2px 10px;
+    margin: 0;
 }
 
-.pc .arrow.up {
+.pc .arrow * {
-    left: 75%;
+    z-index: 1000;
-    --transformation: rotate(180deg) translate(0, -4.5rem);
+
-    transform: var(--transformation);
+    /* Arrow Label Text */
-    -moz-transform: var(--transformation);
+    color: var(--color-arrow-text) !important;
-    -webkit-transform: var(--transformation);
+    font-size: 1rem !important;
-    -o-transform: var(--transformation);
+    line-height: 1.1em !important;
+    font-weight: 600 !important;
+    text-transform: none !important;
+    white-space: normal !important;
+    height: min-content !important;
 }
-.pc .arrow.up > :nth-child(1){
+
-    /* transform: rotate(90deg) translate(0rem, 2rem); */
+.pc .arrow :nth-child(2) {
+    /* Arrow Head */
+    height: 0;
+    width: 0;
+
+    border-left:    2.5rem solid transparent;
+    border-right:   2.5rem solid transparent;
+    border-top:     2rem solid transparent;
+    border-bottom:  2rem solid var(--color-arrow);
+
+    position: absolute;
+    left: -1rem;
+    bottom: 5rem;
+}
+
+
+.pc .arrow-line.top {
+    position: absolute;
+    top: 0;
+}
+
+.pc .arrow-line.bottom {
+    position: absolute;
+    bottom: 0;
+}
+
+
+.pc .arrow-line.top .arrow.up {
+    --transformation: translate(0, -2.5rem);
+}
+.pc .arrow-line.bottom .arrow.up {
+    --transformation: translate(0, -0.5rem);
+}
+
+
+.pc .arrow-line.top .arrow.down {
+    --transformation: translate(0, -4.5rem) rotate(180deg);
+}
+.pc .arrow-line.bottom .arrow.down {
+    --transformation: translate(0, -2.5rem) rotate(180deg);
+}
+.pc .arrow-line.top .arrow.down :nth-child(1) {
     --transformation: rotate(180deg);
 
     transform: var(--transformation);
@@ -569,61 +657,13 @@ th.address {
     -o-transform: var(--transformation);
 }
 
-.pc .arrow.up ~ .arrow.up {
+.pc .arrow-line.bottom .arrow.down :nth-child(1) {
-    left: 50%;
+    --transformation: rotate(180deg);
-}
+    
-
+    transform: var(--transformation);
-.pc .arrow.up ~ .arrow.up ~ .arrow.up {
+    -moz-transform: var(--transformation);
-    left: 25%;
+    -webkit-transform: var(--transformation);
-}
+    -o-transform: var(--transformation);
-
-.pc .arrow.top {
-    bottom: auto;
-    top: -6rem;
-}
-
-
-.pc .arrow > :nth-child(1) {
-    font-size: 1.2em;
-    line-height: 1.1em;
-    font-weight: 600;
-    color: var(--color-arrow-text) !important;
-    background-color: var(--color-arrow) !important;
-    border-color: var(--color-arrow-text) !important;
-    text-transform: none;
-    padding: 2px 10px;
-    margin: 0;
-    /* transform: rotate(-90deg) translate(0rem, -2rem); */
-
-    white-space: normal;
-    height: min-content;
-
-    z-index: 10;
-}
-
-.pc .arrow > :nth-child(1) *{
-    color: var(--color-arrow-text);
-    display: block;
-    white-space: break-spaces;
-}
-
-.pc .arrow > :nth-child(1):hover, .pc .arrow > :nth-child(1) *:hover {
-    color: var(--color-arrow-text-hover);
-}
-
-.pc .arrow > :nth-child(2) {
-    width: 0;
-    height: 0;
-
-    border-left:    2.5rem solid transparent;
-    border-right:   2.5rem solid transparent;
-    border-top:     2rem solid var(--color-arrow);
-    border-bottom:  0rem solid transparent;
-
-    position: absolute;
-    left: -1rem;
-    bottom: -2rem;
-
 }
 
 
@@ -699,7 +739,7 @@ th.address {
     .pc{
         grid-template-rows: auto max-content auto;
         justify-items: center;
-        overflow-x: hidden;
+        /*overflow-x: hidden;*/
     }
 
     .pc .section {
@@ -710,18 +750,22 @@ th.address {
         max-height: 50rem;
     }
 
+    .pc .controls {
+        text-align: center;
+    }
+
     .pc .grid-fullwidth.grid-addressbus,
     .pc .grid-fullwidth.grid-databus {
         --width: 5rem;
-        --text-height: 35rem;
+        --text-height: 32rem;
-        --margin-side: 2rem;
+        --margin-side: 3rem;
 
         width: var(--width);
         box-sizing: border-box;
-        grid-row: 2 / span 3;
+        grid-row: 1 / span 3;
 
         position: relative;
-        padding-bottom: var(--text-height);
+        padding-bottom: calc(var(--text-height) - var(--width));
     }
 
     .pc .grid-fullwidth.grid-addressbus {
@@ -748,7 +792,7 @@ th.address {
     .pc .grid-fullwidth.grid-addressbus > *,
     .pc .grid-fullwidth.grid-databus > * {
         position: sticky;
-        top: 0;
+        top: 6em;
         left: 0;
         margin: 0;
         box-sizing: border-box;
@@ -763,50 +807,63 @@ th.address {
         -o-transform: var(--transformation);
 
         background-color: transparent;
+
+        padding-right: 1em;
+        text-align:  right;
+    }
+
+    .pc .grid-fullwidth.grid-databus > * {
+        float: right;
+        --transformation:  rotate(-90deg) translate( calc(var(--width) / 2 - 50%), calc( -50% + var(--text-height) / 2));
+    }
+
+    .pc .grid-fullwidth.grid-addressbus input,
+    .pc .grid-fullwidth.grid-databus input {
+        margin-right: 0;
     }
 
     .pc .controls.grid-fullwidth {
         grid-column: 1 / span 3;
+
+        position: sticky;
+        top: 0;
+        z-index: 1000;
+        background-color: var(--color-body);
+        margin: -1rem;
+        padding: 1rem;
+        border-bottom: 1px solid var(--color-controls-button-border);
+        width: 100%;
     }
 
+    .pc .arrow-line {
+        width: 0;
+        height: 100%;
 
-    .pc .arrow.down{
+        flex-direction: column;
-        left: inherit;
+    }
+
+    .pc .arrow-line.top {
+        left: 0;
+    }
+
+    .pc .arrow-line.bottom {
         right: 0;
-        bottom: 25%;
-        --transformation: rotate(-90deg) translate(0, 1rem);
-    }
-    .pc .arrow.down > :nth-child(1) {
-        --transformation: rotate(90deg);
-
-        transform: var(--transformation);
-        -moz-transform: var(--transformation);
-        -webkit-transform: var(--transformation);
-        -o-transform: var(--transformation);
     }
 
-    .pc .arrow.up{
+    .pc .arrow-line.top .arrow.up {
-        left: inherit;
+        --transformation: rotate(-90deg) translate(0, -2.85rem);
-        right: 0;
-        top: 25%;
-        --transformation: rotate(90deg) translate(0, -2.5rem);
     }
-    .pc .arrow.up > :nth-child(1) {
+    .pc .arrow-line.bottom .arrow.up {
-        --transformation: rotate(-90deg);
+        --transformation: rotate(-90deg) translate(0, 0.75rem);
-    }
-
-    .pc .arrow.top {
-        right: inherit;
-        left: -4.5rem !important;
-        top: 25%;
-    }
-
-    .pc .arrow.arrow2{
-        top: 75%;
     }
 
 
-
+    .pc .arrow-line.top .arrow.down {
+        --transformation: rotate(90deg) translate(0, 4.5rem);
+    }
+    .pc .arrow-line.bottom .arrow.down {
+        --transformation: rotate(90deg) translate(0, 0.1rem);
+    }
 
     .pc .alu {
         text-align: center;

out/css/style.css

@@ -1,6 +1,7 @@
 body {
 	background-color: var(--color-body);
 	color: var(--color-body-text);
+	font-size: 1.4em;
 }
 
 code {

out/examples-list.json

@@ -3,19 +3,19 @@
 		[
 			{
 				"title": "A simple Counter",
-		  		"version": "0.3",
+		  		"version": "0.4",
 		  		"url": "examples/simple-counter.json",
 		  		"enabled": 1
 			},
 			{
 				"title": "Adding 2 numbers together",
-				"version": "0.2",
+				"version": "0.3",
 				"url": "examples/adding.json",
 				"enabled": 1
 			},
 			{
 				"title": "Empty Canvas",
-				"version": "0.1",
+				"version": "0.2",
 				"url": "examples/empty.json",
 				"enabled": 1
 			}

out/examples/adding.json

@@ -1 +1 @@
-{"model-version":"3","pc_model":{"pc":{"addressBus":0,"dataBus":0,"instructionReg":0,"programmCounter":0,"uCounter":0,"accumulator":0,"ram":[[100013,"Load ValB to Acc"],[300000,"Acc ++"],[200013,"Store Acc to ValB"],[100012,"Load ValA"],[400000,"Acc --"],[200012,"Store Acc to ValA"],[600008,"Jmp If eq 0"],[500000,"Jmp #000"],[0,"END OF PROGRAM"],[0,""],[0,""],[0,""],[7,"ValA"],[14,"ValB + Result"],[0,""],[0,""],[0,""]]},"uCodes":["pc2ab","ram2db","db2ir","pcInc","ir2uc","n","n","n","n","n","ir2ab","ram2db","db2acc","ucReset","n","n","n","n","n","n","acc2db","ir2ab","db2ram","ucReset","n","n","n","n","n","n","accInc","ucReset","n","n","n","n","n","n","n","n","accDec","ucReset","n","n","n","n","n","n","n","n","ir2pc","ucReset","n","n","n","n","n","n","n","n","ir2pciacceq0","ucReset","n","n","n","n","n","n","n","n"]},"autoscroll":true}
+{"model-version":"4","pc_model":{"pc":{"addressBus":0,"dataBus":0,"instructionReg":0,"programmCounter":0,"uCounter":0,"accumulator":0,"ram":[[100013,"Load ValB to Acc"],[300000,"Acc ++"],[200013,"Store Acc to ValB"],[100012,"Load ValA"],[400000,"Acc --"],[200012,"Store Acc to ValA"],[700008,"Jmp If eq 0"],[600000,"Jmp #000"],[500000,"END OF PROGRAM"],[0,""],[0,""],[0,""],[4,"ValA"],[17,"ValB + Result"],[0,""],[0,""],[0,""]]},"uCodes":["pc2ab","ram2db","db2ir","pcInc","ir2uc","n","n","n","n","n","ir2ab","ram2db","db2acc","ucReset","n","n","n","n","n","n","acc2db","ir2ab","db2ram","ucReset","n","n","n","n","n","n","accInc","ucReset","n","n","n","n","n","n","n","n","accDec","ucReset","n","n","n","n","n","n","n","n","alert","ucReset","n","n","n","n","n","n","n","n","ir2pc","ucReset","n","n","n","n","n","n","n","n","ir2pciacceq0","ucReset","n","n","n","n","n","n","n","n"]},"autoscroll":true}

out/examples/empty.json

@@ -1 +1 @@
-{"model-version":"3","pc_model":{"pc":{"addressBus":0,"dataBus":0,"instructionReg":0,"programmCounter":0,"uCounter":0,"accumulator":0,"ram":[[0,""],[0,""],[0,""],[0,""],[0,""],[0,""],[0,""],[0,""],[0,""],[0,""],[0,""]]},"uCodes":["pc2ab","ram2db","db2ir","pcInc","ir2uc","n","n","n","n","n","ir2ab","ram2db","db2acc","ucReset","n","n","n","n","n","n","acc2db","ir2ab","db2ram","ucReset","n","n","n","n","n","n","accInc","ucReset","n","n","n","n","n","n","n","n"]},"autoscroll":true}
+{"model-version":"4","pc_model":{"pc":{"addressBus":0,"dataBus":0,"instructionReg":0,"programmCounter":0,"uCounter":0,"accumulator":0,"ram":[[0,""],[0,""],[0,""],[0,""],[0,""],[0,""],[0,""],[0,""],[0,""],[0,""],[0,""]]},"uCodes":["pc2ab","ram2db","db2ir","pcInc","ir2uc","n","n","n","n","n"]},"autoscroll":true}

out/examples/simple-counter.json

@@ -1 +1 @@
-{"model-version":"3","pc_model":{"pc":{"addressBus":0,"dataBus":0,"instructionReg":0,"programmCounter":0,"uCounter":0,"accumulator":0,"ram":[[100005,"LoadA #005"],[300000,"IncA"],[200005,"StoreA #005"],[400000,"JMP #000"],[0,""],[5,"val"],[0,""],[0,""],[0,""],[0,""],[0,""]]},"uCodes":["pc2ab","ram2db","db2ir","pcInc","ir2uc","n","n","n","n","n","ir2ab","ram2db","db2acc","ucReset","n","n","n","n","n","n","acc2db","ir2ab","db2ram","ucReset","n","n","n","n","n","n","accInc","ucReset","n","n","n","n","n","n","n","n","ir2pc","ucReset","n","n","n","n","n","n","n","n"]},"autoscroll":true}
+{"model-version":"4","pc_model":{"pc":{"addressBus":0,"dataBus":0,"instructionReg":0,"programmCounter":0,"uCounter":0,"accumulator":0,"ram":[[100005,"LoadA #005"],[300000,"IncA"],[200005,"StoreA #005"],[400000,"JMP #000"],[0,""],[5,"val"],[0,""],[0,""],[0,""],[0,""],[0,""]]},"uCodes":["pc2ab","ram2db","db2ir","pcInc","ir2uc","n","n","n","n","n","ir2ab","ram2db","db2acc","ucReset","n","n","n","n","n","n","acc2db","ir2ab","db2ram","ucReset","n","n","n","n","n","n","accInc","ucReset","n","n","n","n","n","n","n","n","ir2pc","ucReset","n","n","n","n","n","n","n","n"]},"autoscroll":true}

out/index.html

@@ -60,7 +60,7 @@
           </li>
           <li>
             <b>Instruction</b>
-            Hiermit kannst du eine ganze Instruction ausführen lassen und musst nicht durch jeden µCode Schritt einzeln durchdrücken.
+            Hiermit kannst du eine ganze Instruktion ausführen lassen und musst nicht durch jeden µCode Schritt einzeln durchdrücken.
           </li>
           <li>
             <b>Reset PC</b>
@@ -71,8 +71,8 @@
             Nachdem im RAM oder im µCode ein anderer Eintrag ausgewählt wurde, kann automatisch zum Eintrag gescrollt werden
           </li>
           <li>
-            <b>Load Example</b>
+            <b>Configs</b>
-            Mit diesem Knopf kannst du ein Beispielprogramm in den PC laden. Dabei wird dein momentanes Programm überschrieben.
+            Hier können sie die momentane Konfiguration herunterladen, selber eine Hochladen oder aus einer Liste von Beispielen laden.
           </li>
         </ul>
 
@@ -83,7 +83,7 @@
 
         <h3>RAM</h3>
         <p>
-          Im Arbeitsspeicher wird das Programm gespeichert. Jeder Eintrag ist dabei in ein Low-Byte und ein High-Byte unterteilt. Dadurch kann man in einem Eintrag die Instruktion und Addresse einfacher unterscheiden.<br>
+          Im Arbeitsspeicher wird das Programm gespeichert. Jeder Eintrag ist dabei in ein Low-Byte und ein High-Byte unterteilt. Dadurch kann man in einem Eintrag die Instruktion und Adresse einfacher unterscheiden.<br>
           <a href="#befehl">Siehe Befehle</a>
         </p>
 
@@ -107,7 +107,7 @@
         <p>
           Über den Datenbus können Daten und Befehle zwischen RAM, Control Unit und ALU übertragen werden.
         </p>
-        <h3>Addressbus</h3>
+        <h3>Adressbus</h3>
         <p>
           Über diesen Bus kann die Control Unit steuern, welcher Wert im RAM ausgewählt wird.<br>
           Bei normalen Rechnern sind hier natürlich noch deutlich mehr Werte angeschlossen.
@@ -116,14 +116,20 @@
         <a id="befehl"></a>
         <h2>Befehle</h2>
         <p>
-          Ein Befehl besteht aus einer Instruktion und einem Argument. Deshalb sind im RAM und im Instruction Register alle Werte separiert.
+          Ein Befehl besteht aus einer Instruktion und einem Argument. Deshalb sind im RAM und im Instruction&nbsp;Register alle Werte separiert.
+        </p>
+        <pre><code>0 0 2   0 0 5 0 4
+Instr   Argument
+</code></pre>
+        <p>
+          In den ersten 3&nbsp;Stellen wird hier der OpCode der Instruction codiert. Wenn dieser Teil in der Control&nbsp;Unit in den µCode&nbsp;Counter geladen wird, dann wird der OpCode mit 10 multipliziert.
+        </p>
+        <p>
+          In den letzten 5&nbsp;Stellen wird ein beliebiger Zahlenwert gespeichert. Dieser kann als Argument für einen Befehl genutzt werden.
+        </p>
+        <p>
+          In diesem Beispiel hier würden die µCodes ab Adresse 20 im µCode Speicher ausgeführt werden.
         </p>
-        <pre>
-          <code>
-            0 0 0   0 0 0 0 0
-            Instr   Argument
-          </code>
-        </pre>
 
         <h2>µCodes</h2>
         <p>
@@ -138,68 +144,117 @@
           </thead>
           <tbody>
             <tr>
-              <td>ProgCounter -> AddrBus</td>
+              <td><code>ProgCounter -> AddrBus</td>
               <td>Lade den Wert des Programm Counters in den Adressbus</td>
             </tr>
             <tr>
-              <td>InstrReg -> ProgCounter</td>
+              <td><code>InstrReg -> ProgCounter</code></td>
               <td>Lade das Argument des Instruktionsregisters in den Programm Counter</td>
             </tr>
             <tr>
-              <td>ProgCounter ++</td>
+              <td><code>ProgCounter ++</td>
-              <td>Erhöhe den Wert des Programm Counter um 1</td>
+              <td>Erhöhe den Wert des Programm Counter um 1</td></td>
             </tr>
             <tr>
-              <td>Acc == 0 => InstReg -> ProgCounter</td>
+              <td><code>Acc == 0 => InstReg -> ProgCounter</code></td>
-              <td>Wenn der Wert des Akkumulators 0 ist, dann lade das Arggument des Instruktionsregisters in den Programm Counter</td>
+              <td>Wenn der Wert des Akkumulators 0 ist, dann lade das Argument des Instruktionsregisters in den Programm Counter</td>
             </tr>
             <tr>
-              <td>Ram -> DataBus</td>
+              <td><code>Ram -> DataBus</code></td>
-              <td>Schreibe den aktuellen Wert aus den RAM auf den Datembus</td>
+              <td>Schreibe den aktuellen Wert aus den RAM auf den Datenbus</td>
             </tr>
             <tr>
-              <td>DataBus -> Ram</td>
+              <td><code>DataBus -> Ram</code></td>
               <td>Schreibe den Wert des Datenbus in die momentane Stelle des RAM</td>
             </tr>
             <tr>
-              <td>DataBus -> InstReg</td>
+              <td><code>DataBus -> InstReg</code></td>
               <td>Lade den Befehl vom Datenbus in das Instruktionsregister</td>
             </tr>
             <tr>
-              <td>DataBus -> Acc</td>
+              <td><code>DataBus -> Acc</code></td>
               <td>Lade den Wert vom Datenbus in den Akkumulator der ALU</td>
             </tr>
             <tr>
-              <td>Acc -> DataBus</td>
+              <td><code>Acc -> DataBus</code></td>
               <td>Schreibe den Wert vom Akkumulator auf den Datenbus</td>
             </tr>
             <tr>
-              <td>Acc ++</td>
+              <td><code>Acc ++</code></td>
               <td>Erhöhe den Wert des Akkumulators um 1</td>
             </tr>
             <tr>
-              <td>Acc --</td>
+              <td><code>Acc --</code></td>
               <td>Verringere den Wert des Akkumulators um 1</td>
             </tr>
             <tr>
-              <td>InstReg -> µCounter</td>
+              <td><code>Acc << DataBus</code></td>
+              <td>Verschiebt den Wert im Akkumulator nach links um den Wert im DatenBus.</td>
+            </tr>
+            <tr>
+              <td><code>Acc >> DataBus</code></td>
+              <td>Verschiebt den Wert im Akkumulator nach rechts um den Wert im DatenBus.</td>
+            </tr>
+            <tr>
+              <td><code>Acc + DataBus</code></td>
+              <td>Addiere den Wert im Datenbus auf den Akkumulator</td>
+            </tr>
+            <tr>
+              <td><code>Acc - DataBus</code></td>
+              <td>Subtrahiere den Wert im Datenbus auf den Akkumulator</td>
+            </tr>
+            <tr>
+              <td><code>Acc * DataBus</code></td>
+              <td>Multipliziere den Wert im Datenbus mit dem Akkumulator</td>
+            </tr>
+            <tr>
+              <td><code>Acc / DataBus</code></td>
+              <td>Dividiere den Akkumulator durch den Datenbus</td>
+            </tr>
+            <tr>
+              <td><code>Acc AND DataBus</code></td>
+              <td>Führe bitweise UND auf Akkumulator mit Datenbus aus</td>
+            </tr>
+            <tr>
+              <td><code>Acc OR DataBus</code></td>
+              <td>Führe bitweise ODER auf Akkumulator mit Datenbus aus</td>
+            </tr>
+            <tr>
+              <td><code>Acc XOR DataBus</code></td>
+              <td>Führe bitweise XOR auf Akkumulator mit Datenbus aus</td>
+            </tr>
+            <tr>
+              <td><code>Acc NOT DataBus</code></td>
+              <td>Führe bitweise NOT auf Akkumulator mit Datenbus aus</td>
+            </tr>
+            <tr>
+              <td><code>InstReg -> µCounter</code></td>
               <td>Nehme das Argument des Befehls im Instruktionsregister, füge am Ende eine 0 an und Lade ihn in den µCounter</td>
             </tr>
             <tr>
-              <td>InstReg -> AddrBus</td>
+              <td><code>InstReg -> AddrBus</code></td>
-              <td>Lade das Argument im Instruktionsregister in den Addressbus</td>
+              <td>Lade das Argument im Instruktionsregister in den Adressbus</td>
             </tr>
             <tr>
-              <td>µCounter = 0</td>
+              <td><code>InstReg -> DataBus</code></td>
+              <td>Lade das Argument im Instruktionsregister in den Adressbus</td>
+            </tr>
+            <tr>
+              <td><code>µCounter = 0</code></td>
               <td>Setzte den µCounter zurück</td>
             </tr>
+            <tr>
+              <td><code>Signal End of Program</code></td>
+              <td>Zeigt ein Popup, dass das Ende des Programms signalisiert.</td>
+            </tr>
           </tbody>
         </table>
 
         <h1>Source</h1>
         <p>
-          Im Moment ist dieser Code noch nicht ordentlich genug, dass es Sinn hat ihn zu veröffentlichen.
+          Das hier ist ein kleines Hobbyprojekt. Meine Implementation ist also nur mit Vorsicht als "best-practice" Vorlage zu verwenden.
         </p>
+          <a href="https://git.yokta.de/Christian/Johnny" class="button">Zum Source Code</a>
         <p>
           Dieses Projekt ist angelehnt an den <a href="https://sourceforge.net/projects/johnnysimulator/" target="_blank">Johnny-Simulator</a>.
         </p>
@@ -232,8 +287,8 @@
             After a value in RAM or in the µCodes is selected you can automatically scroll to them
           </li>
           <li>
-            <b>Load Example</b>
+            <b>Configs</b>
-            Click this button and select an example you want to load. This will overwrite the whole pc including ram and µCode
+            Download the current config, import a config from your machine or choose an example.
           </li>
         </ul>
 
@@ -244,7 +299,7 @@
 
         <h3>RAM</h3>
         <p>
-          The current programm is stored in the RAM. Every entry is seperated as mentioned in <a href="#entry">entry</a>.
+          The current program is stored in the RAM. Every entry is separated as mentioned in <a href="#entry">entry</a>.
         </p>
 
         <h3>Control Unit</h3>
@@ -266,28 +321,33 @@
         </p>
         <h3>Databus</h3>
         <p>
-          Via the Databus values and entrys can be transported between RAM, Control Unit and ALU.
+          Via the databus values and entries can be transported between RAM, Control Unit and ALU.
         </p>
         <h3>Addressbus</h3>
         <p>
-          With the addressbus the Control Unit can control which value is selected in RAM. On a normal computer there are a lot mor things attached to this bus.
+          With the addressbus the Control Unit can control which value is selected in RAM. On a normal computer there are a lot more things attached to this bus.
         </p>
 
         <a id="entry"></a>
         <h2>Entry</h2>
         <p>
-          Each entry consits of a instruction and an argument. That's why the entrys in RAM and in µCodes are displayed seperatly.
+          Each entry consists of a instruction and an argument. That's why the entrys in RAM and in µCodes are displayed separately.
+        <pre><code>0 0 2   0 0 5 0 4
+Instr   Argument
+</code></pre>
+
+        <p>
+          Here, the first 3 digits are the opCode of the instruction. When you try to load this part into the µCode&nbsp;Counter of the Control&nbsp;Unit, it will be automatically multiplied by 10.
+          <br>
+          In this example µCodes starting at the Address 20 will be executed.
+        </p>
+        <p>
+          The last 5 digits are a numerical value that can be used as an argument for the command.
         </p>
-        <pre>
-          <code>
-            0 0 0   0 0 0 0 0
-            Instr   Argument
-          </code>
-        </pre>
 
         <h2>µCodes</h2>
         <p>
-          Every instruction consists of a list of µCodes. Here is an explanaition for all of them:
+          Every instruction consists of a list of µCodes. Here is an explanation for all of them:
         </p>
         <table>
           <thead>
@@ -298,68 +358,117 @@
           </thead>
           <tbody>
             <tr>
-              <td>ProgCounter -> AddrBus</td>
+              <td><code>ProgCounter -> AddrBus</code></td>
-              <td>Load the value from programm counter to addressbus</td>
+              <td>Load the value from program counter to addressbus</td>
             </tr>
             <tr>
-              <td>InstrReg -> ProgCounter</td>
+              <td><code>InstrReg -> ProgCounter</code></td>
-              <td>Load the argument from instruction register to programm counter</td>
+              <td>Load the argument from instruction register to program counter</td>
             </tr>
             <tr>
-              <td>ProgCounter ++</td>
+              <td><code>ProgCounter ++</code></td>
-              <td>Increment programm counter by 1</td>
+              <td>Increment program counter by 1</td>
             </tr>
             <tr>
-              <td>Acc == 0 => InstReg -> ProgCounter</td>
+              <td><code>Acc == 0 => InstReg -> ProgCounter</code></td>
-              <td>If the accumulator is 0 then write the argument from instruction register to programm counter</td>
+              <td>If the accumulator is 0 then write the argument from instruction register to program counter</td>
             </tr>
             <tr>
-              <td>Ram -> DataBus</td>
+              <td><code>Ram -> DataBus</code></td>
               <td>Load selected value from RAM to databus</td>
             </tr>
             <tr>
-              <td>DataBus -> Ram</td>
+              <td><code>DataBus -> Ram</code></td>
               <td>Write value from databus to selected value in RAM</td>
             </tr>
             <tr>
-              <td>DataBus -> InstReg</td>
+              <td><code>DataBus -> InstReg</code></td>
               <td>Write entry from databus to instruction register</td>
             </tr>
             <tr>
-              <td>DataBus -> Acc</td>
+              <td><code>DataBus -> Acc</code></td>
               <td>Write value from databus to accumulator</td>
             </tr>
             <tr>
-              <td>Acc -> DataBus</td>
+              <td><code>Acc -> DataBus</code></td>
               <td>Load value from accumulator to databus</td>
             </tr>
             <tr>
-              <td>Acc ++</td>
+              <td><code>Acc ++</code></td>
               <td>Increment accumulator by 1</td>
             </tr>
             <tr>
-              <td>Acc --</td>
+              <td><code>Acc --</code></td>
               <td>Decrement accumulator by 1</td>
             </tr>
             <tr>
-              <td>InstReg -> µCounter</td>
+              <td><code>Acc << DataBus</code></td>
+              <td>Shift the Accumulator left by the value in databus</td>
+            </tr>
+            <tr>
+              <td><code>Acc >> DataBus</code></td>
+              <td>Shift the Accumulator right by the value in databus</td>
+            </tr>
+            <tr>
+              <td><code>Acc + DataBus</code></td>
+              <td>Add the value of the databus to the accumulator</td>
+            </tr>
+            <tr>
+              <td><code>Acc - DataBus</code></td>
+              <td>Subtract the value of the databus from the accumulator</td>
+            </tr>
+            <tr>
+              <td><code>Acc * DataBus</code></td>
+              <td>Multiply the value of the databus with the accumulator</td>
+            </tr>
+            <tr>
+              <td><code>Acc / DataBus</code></td>
+              <td>Divide the accumulator by the value of the databus</td>
+            </tr>
+            <tr>
+              <td><code>Acc AND DataBus</code></td>
+              <td>Do a bitwise AND to accumulator with the value of the databus</td>
+            </tr>
+            <tr>
+              <td><code>Acc OR DataBus</code></td>
+              <td>Do a bitwise OR to accumulator with the value of the databus</td>
+            </tr>
+            <tr>
+              <td><code>Acc XOR DataBus</code></td>
+              <td>Do a bitwise XOR to accumulator with the value of the databus</td>
+            </tr>
+            <tr>
+              <td><code>Acc NOT DataBus</code></td>
+              <td>Do a bitwise NOT to accumulator with the value of the databus</td>
+            </tr>
+            <tr>
+              <td><code>InstReg -> µCounter</code></td>
               <td>Take the instruction from instruction register, add a 0 at the tail and write it to µCounter</td>
             </tr>
             <tr>
-              <td>InstReg -> AddrBus</td>
+              <td><code>InstReg -> AddrBus</code></td>
               <td>Write the argument from instruction register to addressbus</td>
             </tr>
             <tr>
-              <td>µCounter = 0</td>
+              <td><code>InstReg -> DataBus</code></td>
+              <td>Write the argument from instruction register to databus</td>
+            </tr>
+            <tr>
+              <td><code>µCounter = 0</code></td>
               <td>Set µCounter to 0</td>
             </tr>
+            <tr>
+              <td><code>Signal End of Program</code></td>
+              <td>Show an alert that the end of program is reached.</td>
+            </tr>
           </tbody>
         </table>
 
         <h1>Source</h1>
         <p>
-          At the moment the code for this project isn't good enough to share it online.
+          This is a hobby project so please don't take my code as a "best-practice" implementation.<br>
         </p>
+          <a href="https://git.yokta.de/Christian/Johnny" class="button">See Source Code</a>
         <p>
           This project is my take on <a href="https://sourceforge.net/projects/johnnysimulator/" target="_blank">Johnny-Simulator</a>.
         </p>
@@ -372,7 +481,7 @@
       <div class="container">
         <p>
           Made with ☕ <br>
-          © <a href="https://github.com/ChrisgammaDE" target="_blank">Christian</a>, 2021
+          © <a href="https://github.com/ChrisgammaDE" target="_blank">Christian</a>, 2022
         </p>
         <p>
           <a href="https://yokta.de/i/impressum.html" target="_blank">Impressum</a>

out/js/cookie.js

@@ -2,6 +2,8 @@
 
 // Please import cookie.css!!!!
 
+let __cookie_internal_Banner_shownAndDenied__ = false;
+
 function __cookie_internal_addBanner__(){
 	let banner 				= document.createElement("div");
 	let text 				= document.createElement("div");
@@ -29,6 +31,7 @@ function __cookie_internal_addBanner__(){
 		document.body.removeChild(parent);
 	});
 	button_deny.addEventListener("click", (message) => {
+		__cookie_internal_Banner_shownAndDenied__ = true;
 		let parent = message.target.parentElement;
 		document.body.removeChild(parent);
 	});
@@ -54,7 +57,9 @@ function cookieAccepted() {
 	if (cookie_status == 0) {
 		let maybe_banner = document.getElementsByClassName("cookie-banner")[0];
 		if(maybe_banner == undefined){
-			__cookie_internal_addBanner__();
+			if(!__cookie_internal_Banner_shownAndDenied__){
+				__cookie_internal_addBanner__();
+			}
 		}
 
 		return false;

src/Main.elm

@@ -23,9 +23,10 @@ import File                         exposing (File)
 import File.Select      as Select
 import File.Download    as Download
 
+-- PC Stuff
 import PC.Types                     exposing (..)
-import PC.PC            as PC  
+import PC.PC            as PC
-import PC.Json          
+import PC.Json
 import PC.Helpers                   exposing (..)
 
 -- Note that general Stuff is at the end of the document
@@ -51,6 +52,7 @@ type alias Model =
     , examplesListStatus    : LoaderState
     , exampleLoaderStatus   : LoaderState
     , dragDrop              : DragDrop
+    , showAlert             : Bool
     }
 
 type alias Example =
@@ -89,6 +91,7 @@ type Msg
     | Msg_DrgDrp_Hover              Bool
     | Msg_DrgDrp_GotFiles           File (List File)
     | Msg_DrgDrp_DecodedFiles       String
+    | Msg_Alert_Hide
     | Msg_Nothing
 
 
@@ -117,6 +120,10 @@ update msg model =
                     ( new_model
                     , cmd_up_lStorage_n_Scroller new_model
                     )
+                PUA_Alert ->
+                    ( { new_model | showAlert = True }
+                    , cmd_up_lStorage new_model
+                    )
 
 
         Msg_Autoscroll_Toggle ->    -- User toggled automatic scrolling checkbox
@@ -257,6 +264,10 @@ update msg model =
                     , sendProcessing "Done"
                     )
 
+        Msg_Alert_Hide ->
+            ( {model | showAlert = False}
+            , Cmd.none)
+
         Msg_Nothing -> (model, Cmd.none)
 
     
@@ -276,7 +287,7 @@ cmd_up_lStorage_n_Scroller model =
     Cmd.batch 
         [ cmd_up_lStorage model
         , cmd_scoller model
-        ]                  
+        ]
 
 -- ###############################################################################
 -- ###############################################################################
@@ -318,17 +329,17 @@ doDecodeModel jText =
                 _ -> Nothing
     in
     jText
-    |> JD.decodeString modelDecoder        
+    |> JD.decodeString modelDecoder
     |> error2maybe
 
 modelDecoder : JD.Decoder Model
-modelDecoder =  
+modelDecoder =
     let
         mainDecoder : String -> JD.Decoder Model
         mainDecoder version =
-            if (version == pcModelVersion) then
+            if (version == "4" || version == "3") then
                 JD.map2
-                    (\a b -> Model a b [] False Waiting Waiting initDragDrop )
+                    (\a b -> Model a b [] False Waiting Waiting initDragDrop False )
                     ( JD.field "pc_model"           PC.Json.pcModelDecoder  )
                     ( JD.field "autoscroll"         JD.bool         )
             else
@@ -355,7 +366,8 @@ view : Model -> Html Msg
 view model =
     div []
         [ lazy viewPC model
-        , viewDragDrop model 
+        , viewDragDrop model
+        , viewAlert model
         ]
 
 
@@ -385,7 +397,7 @@ viewPC model =
                     [ HAttr.for "enableScrolling" ]
                     [ text "Autoscroll" ]
                 ]
-            , button [ onClick <| Msg_DEsmpl_Open True ] [ text "Load Example" ]
+            , button [ onClick <| Msg_DEsmpl_Open True ] [ text "Configs" ]
             ]
         , div [class "pc-main"] [ Html.map Msg_PC <| PC.view model.pc_model ]
         , lazy viewExamples model
@@ -478,6 +490,24 @@ viewDragDrop model =
         ]
 
 
+viewAlert : Model -> Html Msg
+viewAlert model =
+    div 
+        [ classList 
+            [("modal", True)
+            , ("hidden", not model.showAlert)]
+        ]
+        [ div [] []
+        , div [ class "modal-card" ] 
+            [ p []
+                [ text "End of Program reached" ]
+            , button 
+                [ onClick Msg_Alert_Hide ]
+                [ text "Ok" ]
+            ]
+        ]
+
+
 dragDropAttributes : List (Attribute Msg)
 dragDropAttributes =
     [ hiJackOn "dragenter" <| JD.succeed <| Msg_DrgDrp_Hover True
@@ -540,6 +570,7 @@ init mayLocalStorage =
             ,  examplesListStatus   = Waiting
             ,  exampleLoaderStatus  = Waiting
             ,  dragDrop             = initDragDrop
+            ,  showAlert            = False
             }
             , Cmd.none )
         Nothing ->
@@ -550,6 +581,7 @@ init mayLocalStorage =
             ,  examplesListStatus   = Waiting
             ,  exampleLoaderStatus  = Waiting
             ,  dragDrop             = initDragDrop
+            ,  showAlert            = False
             }
             , Cmd.none )
 

src/PC/Defaults.elm

@@ -43,11 +43,11 @@ initialRam = Array.fromList
 
 initialUCodes : Array UAction
 initialUCodes = Array.fromList
-    [ UA_ProgrammCounter2AddressBus -- 000
+    [ UA_CU_ProgrammCounter2AddressBus -- 000
     , UA_Ram2DataBus -- 001
     , UA_DataBus2InstructionReg -- 002
-    , UA_ProgrammCounterIncrement -- 003
+    , UA_CU_ProgrammCounterIncrement -- 003
-    , UA_InstructionReg2UCounter -- 004
+    , UA_CU_InstructionReg2UCounter -- 004
     , UA_Nothing -- 005
     , UA_Nothing
     , UA_Nothing
@@ -55,10 +55,10 @@ initialUCodes = Array.fromList
     , UA_Nothing -- 009
 
     -- 010 LOADA
-    , UA_InstructionReg2AddressBus -- 010
+    , UA_CU_InstructionReg2AddressBus -- 010
     , UA_Ram2DataBus -- 011
     , UA_DataBus2Accumulator -- 012
-    , UA_ResetUCounter -- 013
+    , UA_CU_ResetUCounter -- 013
     , UA_Nothing -- 014
     , UA_Nothing
     , UA_Nothing
@@ -67,10 +67,10 @@ initialUCodes = Array.fromList
     , UA_Nothing -- 019
 
     -- 020 STOA
-    , UA_Accumulator2DataBus -- 020
+    , UA_ALU_Accumulator2DataBus -- 020
-    , UA_InstructionReg2AddressBus -- 021
+    , UA_CU_InstructionReg2AddressBus -- 021
     , UA_DataBus2Ram -- 022
-    , UA_ResetUCounter -- 023
+    , UA_CU_ResetUCounter -- 023
     , UA_Nothing --024
     , UA_Nothing
     , UA_Nothing
@@ -79,8 +79,8 @@ initialUCodes = Array.fromList
     , UA_Nothing -- 029
 
     -- 030 INCA
-    , UA_AccumulatorIncrement -- 030
+    , UA_ALU_AccumulatorIncrement -- 030
-    , UA_ResetUCounter -- 031
+    , UA_CU_ResetUCounter -- 031
     , UA_Nothing -- 032
     , UA_Nothing
     , UA_Nothing
@@ -91,8 +91,8 @@ initialUCodes = Array.fromList
     , UA_Nothing -- 039
 
     -- 040 JMP
-    , UA_InstructionReg2ProgrammCounter -- 040
+    , UA_CU_InstructionReg2ProgrammCounter -- 040
-    , UA_ResetUCounter -- 041
+    , UA_CU_ResetUCounter -- 041
     , UA_Nothing -- 042
     , UA_Nothing
     , UA_Nothing

src/PC/Helpers.elm

@@ -9,12 +9,21 @@ import Http         exposing (..)
 -- Please note that only 0 are added. The number will not be shortend!
 addLeadingZero : Int -> Int -> String
 addLeadingZero number length =
-    let
+    if number >= 0 then
-        num_str = String.fromInt number
+        let
-    in
+            num_str = String.fromInt number
-    (String.fromList <| List.repeat (length - String.length num_str) '0'
+        in
-    ) 
+        (String.fromList <| List.repeat (length - String.length num_str) '0'
-    ++ num_str
+        )
+        ++ num_str
+    else
+        let
+            num_str = String.fromInt <| 0-number
+        in
+        "-" ++
+        (String.fromList <| List.repeat (length - String.length num_str) '0'
+        )
+        ++ num_str
 
 
 -- Get the value at a given position in a List.

src/PC/Types.elm

@@ -2,7 +2,7 @@ module PC.Types exposing (..)
 
 import Array    exposing (Array)
 
-pcModelVersion = "3"
+pcModelVersion = "4"
 
 type alias PC_Model =
     { pc        : PC
@@ -26,21 +26,34 @@ type alias UCode =
     , label             : String
     }
 
+-- UActions that can be used in µCode
 type UAction
-    = UA_Accumulator2DataBus
+    = UA_ALU_Accumulator2DataBus
-    | UA_AccumulatorDecrement
+    | UA_ALU_AccumulatorDecrement
-    | UA_AccumulatorIncrement
+    | UA_ALU_AccumulatorIncrement
+    | UA_ALU_AccumulatorShiftLeftByDataBus
+    | UA_ALU_AccumulatorShiftRightByDataBus
+    | UA_ALU_AccumulatorAddByDataBus
+    | UA_ALU_AccumulatorSubtractByDataBus
+    | UA_ALU_AccumulatorMultiplyByDataBus
+    | UA_ALU_AccumulatorDivideByDataBus
+    | UA_ALU_AccumulatorANDDataBus
+    | UA_ALU_AccumulatorORDataBus
+    | UA_ALU_AccumulatorXORDataBus
+    | UA_ALU_AccumulatorNOT
+    | UA_CU_InstructionReg2AddressBus
+    | UA_CU_InstructionReg2DataBus
+    | UA_CU_InstructionReg2ProgrammCounter
+    | UA_CU_InstructionReg2UCounter
+    | UA_CU_ProgrammCounterIncrement
+    | UA_CU_InstructionReg2ProgrammCounterIfAccEq0
+    | UA_CU_ProgrammCounter2AddressBus
+    | UA_CU_ResetUCounter
     | UA_DataBus2Accumulator
     | UA_DataBus2InstructionReg
     | UA_DataBus2Ram
-    | UA_InstructionReg2AddressBus
-    | UA_InstructionReg2ProgrammCounter
-    | UA_InstructionReg2UCounter
-    | UA_ProgrammCounterIncrement
-    | UA_InstructionReg2ProgrammCounterIfAccEq0
     | UA_Ram2DataBus
-    | UA_ResetUCounter
+    | UA_AlertUser
-    | UA_ProgrammCounter2AddressBus
     | UA_Nothing
 
 
@@ -73,6 +86,7 @@ type PC_Msg
 -- to happen after a update
 type PC_AfterUpdateAction
     = PUA_Nothing                   -- Do nothing
+    | PUA_Alert                     -- Alert the user
     | PUA_Storage                   -- Update localStorage
     | PUA_Scroller                  -- Scroll to value
     | PUA_Storage_And_Scroller      -- Update localStorage and scroll to values

src/PC/UActions.elm

@@ -5,28 +5,41 @@ module PC.UActions      exposing ( uCodes
 
 import Array            exposing (Array)
 import Tuple
+import Bitwise
 
 import PC.Types         exposing (..)
 import PC.Helpers       exposing (..)
 
 uCodes : List UCode
 uCodes =
-    [ UCode UA_Accumulator2DataBus              "acc2db"    actAccumulator2DataBus          "Acc -> DataBus"        
+    [ UCode UA_Nothing                              "n"         (\s -> s)                       "Empty"                  
-    , UCode UA_AccumulatorDecrement             "accDec"    actAccumulatorDecrement         "Acc --"                
+    , UCode UA_ALU_Accumulator2DataBus              "acc2db"    actAccumulator2DataBus          "Acc -> DataBus"         
-    , UCode UA_AccumulatorIncrement             "accInc"    actAccumulatorIncrement         "Acc ++"                
+    , UCode UA_ALU_AccumulatorDecrement             "accDec"    actAccumulatorDecrement         "Acc --"                 
-    , UCode UA_DataBus2Accumulator              "db2acc"    actDataBus2Accumulator          "DataBus -> Acc"        
+    , UCode UA_ALU_AccumulatorIncrement             "accInc"    actAccumulatorIncrement         "Acc ++"                 
-    , UCode UA_DataBus2InstructionReg           "db2ir"     actDataBus2InstructionReg       "DataBus -> InstReg"    
+    , UCode UA_ALU_AccumulatorShiftLeftByDataBus    "accLsN"    actAccumulatorShiftLeft         "Acc << DataBus"         
-    , UCode UA_DataBus2Ram                      "db2ram"    actDataBus2Ram                  "DataBus -> Ram"        
+    , UCode UA_ALU_AccumulatorShiftRightByDataBus   "accRsN"    actAccumulatorShiftRight        "Acc >> DataBus"         
-    , UCode UA_InstructionReg2AddressBus        "ir2ab"     actInstructionReg2AddressBus    "InstReg -> AddrBus"    
+    , UCode UA_ALU_AccumulatorAddByDataBus          "accAdd"    actAccumulatorAdd               "Acc + DataBus"          
-    , UCode UA_InstructionReg2ProgrammCounter   "ir2pc"     actInstructionReg2ProgrammCounter "InstReg -> ProgCount" 
+    , UCode UA_ALU_AccumulatorSubtractByDataBus     "accSub"    actAccumulatorSub               "Acc - DataBus"          
-    , UCode UA_InstructionReg2UCounter          "ir2uc"     actInstructionReg2UCounter      "InstReg -> µCounter"   
+    , UCode UA_ALU_AccumulatorMultiplyByDataBus     "accMul"    actAccumulatorMultiply          "Acc * DataBus"          
-    , UCode UA_ProgrammCounterIncrement         "pcInc"     actProgrammCounterIncrement     "ProgCounter ++"        
+    , UCode UA_ALU_AccumulatorDivideByDataBus       "accDiv"    actAccumulatorDivide            "Acc / DataBus"          
-    , UCode UA_Ram2DataBus                      "ram2db"    actRam2DataBus                  "Ram -> DataBus"        
+    , UCode UA_ALU_AccumulatorANDDataBus            "accAND"    actAccumulatorAND               "Acc AND DataBus"        
-    , UCode UA_ResetUCounter                    "ucReset"   actResetUCounter                "µCounter = 0"      
+    , UCode UA_ALU_AccumulatorORDataBus             "accOR"     actAccumulatorOR                "Acc OR DataBus"         
-    , UCode UA_ProgrammCounter2AddressBus       "pc2ab"     actProgrammCounter2AddressBus   "ProgCounter -> AddrBus" 
+    , UCode UA_ALU_AccumulatorXORDataBus            "accXOR"    actAccumulatorXOR               "Acc XOR DataBus"        
-    , UCode UA_Nothing                          "n"         (\s -> s)                       "Empty" 
+    , UCode UA_ALU_AccumulatorNOT                   "accNOT"    actAccumulatorNOT               "Acc NOT"                
-    , UCode UA_InstructionReg2ProgrammCounterIfAccEq0 
+    , UCode UA_CU_InstructionReg2AddressBus         "ir2ab"     actInstructionReg2AddressBus    "InstReg -> AddrBus"     
-                        "ir2pciacceq0" actInstructionReg2ProgrammCounterIfAccEq0 "Acc == 0 => InstReg -> ProgCounter"           
+    , UCode UA_CU_InstructionReg2DataBus            "ir2db"     actInstructionReg2DataBus       "InstReg -> DataBus"     
+    , UCode UA_CU_InstructionReg2ProgrammCounter    "ir2pc"     actInstructionReg2ProgrammCounter "InstReg -> ProgCount" 
+    , UCode UA_CU_InstructionReg2UCounter           "ir2uc"     actInstructionReg2UCounter      "InstReg -> µCounter"    
+    , UCode UA_CU_ProgrammCounterIncrement          "pcInc"     actProgrammCounterIncrement     "ProgCounter ++"         
+    , UCode UA_CU_ProgrammCounter2AddressBus        "pc2ab"     actProgrammCounter2AddressBus   "ProgCounter -> AddrBus" 
+    , UCode UA_CU_ResetUCounter                     "ucReset"   actResetUCounter                "µCounter = 0"           
+    , UCode UA_CU_InstructionReg2ProgrammCounterIfAccEq0 
+                        "ir2pciacceq0" actInstructionReg2ProgrammCounterIfAccEq0 "Acc == 0 => InstReg -> ProgCounter"    
+    , UCode UA_DataBus2Accumulator                  "db2acc"    actDataBus2Accumulator          "DataBus -> Acc"         
+    , UCode UA_DataBus2InstructionReg               "db2ir"     actDataBus2InstructionReg       "DataBus -> InstReg"     
+    , UCode UA_DataBus2Ram                          "db2ram"    actDataBus2Ram                  "DataBus -> Ram"         
+    , UCode UA_Ram2DataBus                          "ram2db"    actRam2DataBus                  "Ram -> DataBus"         
+    , UCode UA_AlertUser                            "alert"     actDoAlert                      "Signal End of Programm" 
     ]
 
 
@@ -72,6 +85,12 @@ actInstructionReg2AddressBus pc =
     in
     { pc | addressBus = address }
 
+actInstructionReg2DataBus : PC -> PC
+actInstructionReg2DataBus pc =
+    let
+        (_, data) = seperateInstructionsEntry pc.instructionReg
+    in
+    { pc | dataBus = data }
 
 actInstructionReg2ProgrammCounter : PC -> PC
 actInstructionReg2ProgrammCounter pc =
@@ -120,6 +139,47 @@ actAccumulatorDecrement : PC -> PC
 actAccumulatorDecrement pc =
     { pc | accumulator = pc.accumulator - 1 }
 
+actAccumulatorShiftLeft : PC -> PC
+actAccumulatorShiftLeft pc = 
+    { pc | accumulator = pc.accumulator * (2 ^ pc.dataBus) }
+
+actAccumulatorShiftRight : PC -> PC
+actAccumulatorShiftRight pc = 
+    { pc | accumulator = pc.accumulator // (2 ^ pc.dataBus) }
+
+actAccumulatorAdd : PC -> PC
+actAccumulatorAdd pc = 
+    { pc | accumulator = pc.accumulator + pc.dataBus }
+
+actAccumulatorSub : PC -> PC
+actAccumulatorSub pc = 
+    { pc | accumulator = pc.accumulator - pc.dataBus }
+
+actAccumulatorMultiply : PC -> PC
+actAccumulatorMultiply pc = 
+    { pc | accumulator = pc.accumulator * pc.dataBus }
+
+actAccumulatorDivide : PC -> PC
+actAccumulatorDivide pc = 
+    { pc | accumulator = pc.accumulator // pc.dataBus }
+
+actAccumulatorAND : PC -> PC
+actAccumulatorAND pc =
+    { pc | accumulator = Bitwise.and pc.accumulator pc.dataBus }
+
+actAccumulatorOR : PC -> PC
+actAccumulatorOR pc =
+    { pc | accumulator = Bitwise.or pc.accumulator pc.dataBus }
+
+actAccumulatorXOR : PC -> PC
+actAccumulatorXOR pc =
+    { pc | accumulator = Bitwise.xor pc.accumulator pc.dataBus }
+
+actAccumulatorNOT : PC -> PC
+actAccumulatorNOT pc =
+    { pc | accumulator = Bitwise.complement pc.accumulator }
+
+
 
 actDataBus2Ram : PC -> PC
 actDataBus2Ram pc =
@@ -129,6 +189,9 @@ actDataBus2Ram pc =
     in
     { pc | ram = newRam }
 
+actDoAlert : PC -> PC
+actDoAlert pc = pc      -- This gets caputred by update anyway
+
 
 -- #################################################################
 -- Helpers

src/PC/Update.elm

@@ -11,15 +11,22 @@ import PC.Helpers       exposing (..)
 pc_update : PC_Msg -> PC_Model -> (PC_Model, PC_AfterUpdateAction)
 pc_update msg model =
     case msg of
-        PM_B_UCycleStep ->          
+        PM_B_UCycleStep ->
-            ( uStepPC model
+            let (new_model, reqAlert) = uStepPC model
-            ,   if model.pc.uCounter == 0 then PUA_Storage_And_Scroller
+            in
-                else                           PUA_Scroller
+            ( new_model
+            ,  if reqAlert == True            then PUA_Alert
+               else if model.pc.uCounter == 0 then PUA_Storage_And_Scroller
+               else                                PUA_Scroller
             )
 
-        PM_B_InstructionStep ->     
+        PM_B_InstructionStep -> 
-            ( executeInstruction model
+            let (new_model, reqAlert) = executeInstruction model
-            , PUA_Storage_And_Scroller )
+            in 
+            ( new_model
+            , if reqAlert then PUA_Alert
+              else PUA_Storage_And_Scroller 
+            )
 
 
         PM_B_Reset ->
@@ -177,7 +184,7 @@ getAction uAction =
             (\s -> s)
     
 
-uStepPC : PC_Model -> PC_Model
+uStepPC : PC_Model -> (PC_Model, Bool)
 uStepPC model =
     let
         uCounter =
@@ -198,47 +205,27 @@ uStepPC model =
                 f       = uCode.action
                 new_pc = f temp_pc
             in 
-            { model | pc = new_pc }
+            if uCode.variant == UA_AlertUser then
-
+                (model, True)
-
+            else
-            --let
+                ({ model | pc = new_pc }, False)
-            --    possible_instructions =
-            --        List.filter (\s -> Tuple.first s == action) uCodeMaps
-            --in
-            --case List.head possible_instructions of
-            --    Just ( name, instruction ) ->
-            --        let
-            --            old_pc =
-            --                model.pc
-
-            --            new_pc =
-            --                { old_pc | uCounter = old_pc.uCounter + 1 }
-            --        in
-            --        { model | pc = instruction new_pc }
-
-            --    _ ->
-            --        let
-            --            old_pc =
-            --                model.pc
-
-            --            new_pc =
-            --                { old_pc | uCounter = 0 }
-            --        in
-            --        { model | pc = new_pc }
 
         _ ->
-            model
+            (model, False)
 
 
-executeInstruction : PC_Model -> PC_Model
+executeInstruction : PC_Model -> (PC_Model, Bool)
 executeInstruction model =
     let
-        new_model = uStepPC model
+        (new_model, reqAlert) = uStepPC model
     in
-    if new_model.pc.uCounter == 0 then
+    if new_model.pc.uCounter == 1 then
-        uStepPC new_model
+        (new_model, reqAlert)
     else
-        executeInstruction new_model
+        if reqAlert then
+            (new_model, True)
+        else
+            executeInstruction new_model
 
 
 -- ###############################################################################

src/PC/View.elm

@@ -37,7 +37,9 @@ viewRam : PC_Model -> Html PC_Msg
 viewRam model =
     div [ class "section", class "ram" ]
         [ h1  [ class "header" ] [ text "RAM" ]
-        , div [ class "arrow", class "down", class "top"] [ div [] [] , div [] [] ]
+        , div [ class "arrow-line", class "top" ]
+            [ div [ class "arrow", class "down"] [ div [] [] , div [] [] ]
+            ]
         , div [ class "scroller" ]
             [ Html.table [ class "" ]
                 [ Html.thead [ class "head" ]
@@ -50,8 +52,10 @@ viewRam model =
                 , lazy viewRamContent model
                 ]
             ]
-        , drawArrow Bottom Down UA_Ram2DataBus "Ram -> DataBus"
+        , div [ class "arrow-line", class "bottom" ]
-        , drawArrow Bottom Up   UA_DataBus2Ram "DataBus -> Ram"
+            [ drawArrow Down UA_Ram2DataBus "Ram -> DataBus"
+            , drawArrow Up   UA_DataBus2Ram "DataBus -> Ram"
+            ]
         ]
 
 
@@ -129,81 +133,58 @@ viewCu model =
         ( instrRegInst, instrRegAddr ) = seperateInstructionsEntry model.pc.instructionReg
     in
     div [ class "section", class "cu" ]
-        [ drawArrow Top Up UA_InstructionReg2AddressBus  "InstR -> AddrB"
+        [ div [ class "arrow-line", class "top" ]
-        , drawArrow Top Up UA_ProgrammCounter2AddressBus "ProgCounter -> AddrB"
+            [ drawArrow Up UA_CU_InstructionReg2AddressBus  "InstR -> AddrB"
-        --, div [ class "arrow", class "up", class "top"] 
+            , drawArrow Up UA_CU_ProgrammCounter2AddressBus "ProgCounter -> AddrB"
-        --    [ div [ class "button" ] 
+            ]
-        --        [ Html.a [ onClick (PM_ManualStep ActInstructionReg2AddressBus)] [ text "InstR -> AddrB" ]]
-        --    , div [] []
-        --    ]
-        --, div [ class "arrow", class "up", class "top", class "arrow2"] 
-        --    [ div [ class "button" ] 
-        --        [ Html.a [ onClick (PM_ManualStep ActProgrammCounter2AddressBus)] [ text "ProgCounter -> AddrB" ]]
-        --    , div [] []
-        --    ]
-
-
         , h1 [ class "header" ] [ text "Control Unit" ]
-        , p []
+        , div [ class "action-area" ]
-            [ div [class "input-row"] 
+            [ -- Programm Counter
-                [ Html.label [ HAttr.for "cu-progcounter" ] [ text "Programm Counter:" ]
+              Html.label [ HAttr.for "cu-progcounter" ] [ text "Programm Counter:" ]
-                , div [ class "input-group" ]
+            , button 
-                    [ button 
+                [ onClick <| PM_ManualStep UA_CU_InstructionReg2ProgrammCounter ]
-                        [ onClick <| PM_ManualStep UA_InstructionReg2ProgrammCounter ]
+                [ text "InstRA -> " ]
-                        [ text "InstRA -> " ]
+            , Html.input
-                    , Html.input
+                [ HAttr.type_ "number"
-                        [ HAttr.type_ "number"
+                , HAttr.id "cu-progcounter"
-                        , HAttr.id "cu-progcounter"
+                , value (addLeadingZero model.pc.programmCounter 3)
-                        , value (addLeadingZero model.pc.programmCounter 3)
+                , onInput PM_F_CuProgCounterEdit
-                        , onInput PM_F_CuProgCounterEdit
+                ] []
-                        ] []
+            -- IR
-                    ]
+            , Html.label [HAttr.for "cu-instrReg"  ] [ text "Instruction Register:" ]
-                ]
+            , Html.input
-
+                [ HAttr.type_ "number"
-            , div [class "input-row"] 
+                , HAttr.id "cu-instrReg"
-                [ Html.label [ HAttr.for "cu-instrReg" ] [ text "Instruction Register:" ]
+                , class "instruction"
-                , div [] 
+                , value (addLeadingZero instrRegInst 3)
-                    [ Html.input
+                , onInput PM_F_CuInstrRegEditInstr
-                        [ HAttr.type_ "number"
+                ] []
-                        , HAttr.id "cu-instrReg"
+            , Html.input
-                        , class "instruction"
+                [ HAttr.type_ "number"
-                        , value (addLeadingZero instrRegInst 3)
+                , HAttr.id "cu-instrReg"
-                        , onInput PM_F_CuInstrRegEditInstr
+                , class "address"
-                        ] []
+                , value (addLeadingZero instrRegAddr 5)
-                    , Html.input
+                , onInput PM_F_CuInstrRegEditAddr
-                        [ HAttr.type_ "number"
+                ] []
-                        , HAttr.id "cu-instrReg"
+            -- µCounter
-                        , class "address"
+            , Html.label [ HAttr.for "cu-uCounter" ] [ text "µCode Counter:" ]
-                        , value (addLeadingZero instrRegAddr 5)
+            , button 
-                        , onInput PM_F_CuInstrRegEditAddr
+                [ onClick <| PM_ManualStep UA_CU_InstructionReg2UCounter ]
-                        ] []
+                [ text "IntrRI ->" ]
-                    ]
+            , Html.input
-                ]
+                [ HAttr.type_ "number"
-
+                , HAttr.id "cu-uCounter"
-            , div [class "input-row"] 
+                , value (addLeadingZero model.pc.uCounter 4)
-                [ Html.label [ HAttr.for "cu-uCounter" ] [ text "µCode Counter:" ]
+                , onInput PM_F_CuUCounterEdit
-                , div [ class "input-group" ]
+                ] []
-                    [ button 
-                        [ onClick <| PM_ManualStep UA_InstructionReg2UCounter ]
-                        [ text "IntrRI ->" ]
-                    , Html.input
-                        [ HAttr.type_ "number"
-                        , HAttr.id "cu-uCounter"
-                        , value (addLeadingZero model.pc.uCounter 4)
-                        , onInput PM_F_CuUCounterEdit
-                        ] []
-                    ]
-                ]
             ]
         , div [ class "scroller" ]
             [ viewCuUCode model
             ]
-        --, div [ class "arrow", class "up"] 
+        , div [ class "arrow-line", class "bottom" ]
-        --    [ div [ class "button" ] 
+            [ drawArrow Up UA_DataBus2InstructionReg "DB -> InstR"
-        --        [ Html.a [ onClick (MsgManualStep ActDataBus2InstructionReg) ] [ text "DB -> InstR" ]]
+            , drawArrow Down UA_CU_InstructionReg2DataBus "InstR -> DB"
-        --    , div [] []
+            ]
-        --    ]
-        , drawArrow Bottom Up UA_DataBus2InstructionReg "DB -> InstR"
         ]
 
 
@@ -282,7 +263,7 @@ viewAlu : PC_Model -> Html PC_Msg
 viewAlu model =
     div [ class "section", class "alu" ]
         [ h1 [ class "header" ] [ text "ALU" ]
-        , p [] 
+        , p []
             [ Html.label [ HAttr.for "alu-accumulator" ] [ text "Accumulator:" ]
             , Html.input
                 [ HAttr.type_ "number"
@@ -291,22 +272,38 @@ viewAlu model =
                 , onInput PM_F_AluEdit
                 ] []
             ]
-        , p [] 
+        , div []
-            [ button [ onClick <| PM_ManualStep UA_AccumulatorIncrement ] [ text "Acc ++" ]
+            [ Html.span [] [ text "General µActions" ]
-            , button [ onClick <| PM_ManualStep UA_AccumulatorDecrement ] [ text "Acc --" ]
+            , Html.br [] []
+            , div [ class "button-group-alu__2-elements" ]
+                [ button [ onClick <| PM_ManualStep UA_ALU_AccumulatorIncrement ]           [ text "Acc ++" ]
+                , button [ onClick <| PM_ManualStep UA_ALU_AccumulatorDecrement ]           [ text "Acc --" ]
+                ]
+            ]
+        , div []
+            [ Html.span [] [ text "µActions from DataBus" ]
+            , div [ class "button-group-alu__2-elements" ]
+                [ button [ onClick <| PM_ManualStep UA_ALU_AccumulatorShiftLeftByDataBus ]  [ text "LeftShift"]
+                , button [ onClick <| PM_ManualStep UA_ALU_AccumulatorShiftRightByDataBus ] [ text "RightShift" ]
+                ]
+            , div [ class "button-group-alu__4-elements" ]
+                [ button [ onClick <| PM_ManualStep UA_ALU_AccumulatorAddByDataBus ]        [ text "+" ]
+                , button [ onClick <| PM_ManualStep UA_ALU_AccumulatorSubtractByDataBus ]   [ text "-" ]
+                , button [ onClick <| PM_ManualStep UA_ALU_AccumulatorMultiplyByDataBus ]   [ text "*" ]
+                , button [ onClick <| PM_ManualStep UA_ALU_AccumulatorDivideByDataBus ]     [ text "/" ]
+                ]
+            , Html.span [] [ text "Bitwise operations"]
+            , div [ class "button-group-alu__4-elements" ]
+                [ button [ onClick <| PM_ManualStep UA_ALU_AccumulatorANDDataBus ]          [ text "AND" ]
+                , button [ onClick <| PM_ManualStep UA_ALU_AccumulatorORDataBus ]           [ text "OR" ]
+                , button [ onClick <| PM_ManualStep UA_ALU_AccumulatorXORDataBus ]          [ text "XOR" ]
+                , button [ onClick <| PM_ManualStep UA_ALU_AccumulatorNOT ]                 [ text "NOT" ]
+                ]
+            ]
+        , div [ class "arrow-line", class "bottom" ]
+            [ drawArrow Up UA_DataBus2Accumulator        "DB -> ALU"
+            , drawArrow Down UA_ALU_Accumulator2DataBus  "ALU -> DB"
             ]
-        , drawArrow Bottom Up UA_DataBus2Accumulator   "DB -> ALU"
-        , drawArrow Bottom Down UA_Accumulator2DataBus "ALU -> DB"
-        --, div [ class "arrow", class "up"] 
-        --    [ div [ class "button" ] 
-        --        [ Html.a [ onClick (MsgManualStep ActDataBus2Accumulator)] [ text "DB -> ALU" ]]
-        --    , div [] []
-        --    ]
-        --, div [ class "arrow", class "down"] 
-        --    [ div [ class "button" ] 
-        --        [ Html.a [ onClick (MsgManualStep ActAccumulator2DataBus)] [ text "ALU -> DB" ]]
-        --    , div [] []
-        --    ]
         ]
 
 -- #####################################################################
@@ -350,17 +347,16 @@ viewAddressBus model =
 -- Helpers
 -- #####################################################################
 
-type Arrow_Pos = Top | Bottom
 type Arrow_Dir = Up  | Down
 
-drawArrow : Arrow_Pos -> Arrow_Dir -> UAction -> String -> Html PC_Msg
+drawArrow : Arrow_Dir -> UAction -> String -> Html PC_Msg
-drawArrow pos dir act str =
+drawArrow dir act str =
     div 
         [ HAttr.classList
             [ ("arrow", True)
-            , ("top",   pos == Top)
+            , ("up",   dir == Up)
-            , ("up",    dir == Up)
+            , ("down", dir == Down)
-            , ("down",  dir == Down)]
+            ]
         ]
         [ div [ class "button" ] 
             [ Html.a