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Functional emulator, mostly complete hardware elements, functional to…
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…kenizer
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@dangermccann
dangermccann committed May 22, 2012
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18 changes: 18 additions & 0 deletions LICENSE
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Copyright (c) 2012 John McCann

Permission is hereby granted, free of charge, to any person obtaining a copy of
this software and associated documentation files (the "Software"), to deal in
the Software without restriction, including without limitation the rights to
use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
the Software, and to permit persons to whom the Software is furnished to do so,
subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
140 changes: 140 additions & 0 deletions index.html
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
<link type="text/css" href="stylesheets/styles.css" rel="stylesheet" />
<script src="http://code.jquery.com/jquery-latest.js"></script>
<script type="text/javascript" src="javascript/emulator.js"></script>
<script type="text/javascript" src="javascript/lem1820.js"></script>
<script type="text/javascript" src="javascript/assembler.js"></script>


<script>
$(document).ready(function(){

var program = [

Utils.makeInstruction(OPERATION_SET, Literals.L_16, REGISTER_X),

// clear background
Utils.makeInstruction( OPERATION_SET, Values.NEXT_WORD_LITERAL,
REGISTER_X + Values.REGISTER_VALUE_OFFSET),
Utils.makeVideoCell(0x20, 0, 1, 0xa),
Utils.makeInstruction(OPERATION_ADD, Literals.L_1, REGISTER_X),
Utils.makeInstruction(OPERATION_IFN, REGISTER_X, Values.NEXT_WORD_LITERAL), 0x190,
Utils.makeInstruction(OPERATION_SUB, Literals.L_6, REGISTER_PC),


Utils.makeInstruction(OPERATION_SET, Literals.L_16, REGISTER_X),

// h
Utils.makeInstruction( OPERATION_SET, Values.NEXT_WORD_LITERAL,
REGISTER_X + Values.REGISTER_VALUE_OFFSET),
Utils.makeVideoCell(0x68, 0, 1, 0xa),
Utils.makeInstruction(OPERATION_ADD, Literals.L_1, REGISTER_X),

// e
Utils.makeInstruction( OPERATION_SET, Values.NEXT_WORD_LITERAL,
REGISTER_X + Values.REGISTER_VALUE_OFFSET),
Utils.makeVideoCell(0x65, 0, 1, 0xa),
Utils.makeInstruction(OPERATION_ADD, Literals.L_1, REGISTER_X),

// l
Utils.makeInstruction( OPERATION_SET, Values.NEXT_WORD_LITERAL,
REGISTER_X + Values.REGISTER_VALUE_OFFSET),
Utils.makeVideoCell(0x6c, 0, 1, 0xa),
Utils.makeInstruction(OPERATION_ADD, Literals.L_1, REGISTER_X),

// l
Utils.makeInstruction( OPERATION_SET, Values.NEXT_WORD_LITERAL,
REGISTER_X + Values.REGISTER_VALUE_OFFSET),
Utils.makeVideoCell(0x6c, 0, 1, 0xa),
Utils.makeInstruction(OPERATION_ADD, Literals.L_1, REGISTER_X),

// o
Utils.makeInstruction( OPERATION_SET, Values.NEXT_WORD_LITERAL,
REGISTER_X + Values.REGISTER_VALUE_OFFSET),
Utils.makeVideoCell(0x6f, 0, 1, 0xa),
Utils.makeInstruction(OPERATION_ADD, Literals.L_1, REGISTER_X),

//
Utils.makeInstruction( OPERATION_SET, Values.NEXT_WORD_LITERAL,
REGISTER_X + Values.REGISTER_VALUE_OFFSET),
Utils.makeVideoCell(0x20, 0, 1, 0xa),
Utils.makeInstruction(OPERATION_ADD, Literals.L_1, REGISTER_X),

// w
Utils.makeInstruction( OPERATION_SET, Values.NEXT_WORD_LITERAL,
REGISTER_X + Values.REGISTER_VALUE_OFFSET),
Utils.makeVideoCell(0x77, 0, 1, 0xa),
Utils.makeInstruction(OPERATION_ADD, Literals.L_1, REGISTER_X),

// o
Utils.makeInstruction( OPERATION_SET, Values.NEXT_WORD_LITERAL,
REGISTER_X + Values.REGISTER_VALUE_OFFSET),
Utils.makeVideoCell(0x6f, 0, 1, 0xa),
Utils.makeInstruction(OPERATION_ADD, Literals.L_1, REGISTER_X),

// r
Utils.makeInstruction( OPERATION_SET, Values.NEXT_WORD_LITERAL,
REGISTER_X + Values.REGISTER_VALUE_OFFSET),
Utils.makeVideoCell(0x72, 0, 1, 0xa),
Utils.makeInstruction(OPERATION_ADD, Literals.L_1, REGISTER_X),

// l
Utils.makeInstruction( OPERATION_SET, Values.NEXT_WORD_LITERAL,
REGISTER_X + Values.REGISTER_VALUE_OFFSET),
Utils.makeVideoCell(0x6c, 0, 1, 0xa),
Utils.makeInstruction(OPERATION_ADD, Literals.L_1, REGISTER_X),

// d
Utils.makeInstruction( OPERATION_SET, Values.NEXT_WORD_LITERAL,
REGISTER_X + Values.REGISTER_VALUE_OFFSET),
Utils.makeVideoCell(0x64, 0, 1, 0xa),
Utils.makeInstruction(OPERATION_ADD, Literals.L_1, REGISTER_X),

Utils.makeInstruction(OPERATION_SET, Values.NEXT_WORD_LITERAL, REGISTER_A), 0x3,
Utils.makeInstruction(OPERATION_SET, Literals.L_5, REGISTER_B),
Utils.makeSpecialInstruction(OPERATION_HWI, Literals.L_0),

Utils.makeInstruction(OPERATION_SET, Literals.L_0, REGISTER_A),
Utils.makeInstruction(OPERATION_SET, Literals.L_16, REGISTER_B),
Utils.makeSpecialInstruction(OPERATION_HWI, Literals.L_0),


// check for key
Utils.makeInstruction(OPERATION_SET, Literals.L_1, REGISTER_A),
Utils.makeSpecialInstruction(OPERATION_HWI, Literals.L_1),
Utils.makeInstruction(OPERATION_IFE, REGISTER_C, Values.NEXT_WORD_LITERAL), 0x00,
Utils.makeInstruction(OPERATION_SUB, Literals.L_5, REGISTER_PC),

// prepare new X value
Utils.makeInstruction(OPERATION_SET, Literals.L_1, REGISTER_Y),
Utils.makeInstruction(OPERATION_SHL, Literals.L_8, REGISTER_Y),
Utils.makeInstruction(OPERATION_BOR, REGISTER_Y, REGISTER_C),

Utils.makeInstruction(OPERATION_SET, Literals.L_10, REGISTER_Y),
Utils.makeInstruction(OPERATION_SHL, Literals.L_12, REGISTER_Y),
Utils.makeInstruction(OPERATION_BOR, REGISTER_Y, REGISTER_C),
Utils.makeInstruction( OPERATION_SET, REGISTER_C,
REGISTER_X + Values.REGISTER_VALUE_OFFSET),
Utils.makeInstruction(OPERATION_ADD, Literals.L_1, REGISTER_X),
Utils.makeInstruction(OPERATION_SET, Literals.L_0, REGISTER_A),
Utils.makeSpecialInstruction(OPERATION_HWI, Literals.L_0),

Utils.makeInstruction(OPERATION_SUB, Literals.L_16, REGISTER_PC)

];

var e = new Emulator();
e.async = true;
e.devices.push(new Monitor(e));
e.devices.push(new Keyboard(e));
e.run(program);

});
</script>
</head>
<body>

</body>
</html>
81 changes: 81 additions & 0 deletions javascript/assembler.js
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Tokenizer = {

tokens: [
{ pattern: /^(;.*)/, type: "comment" },
{ pattern: /^\b(0x[0-9ABCDEF]+)\b/i, type: "hexidecimal" },
{ pattern: /^\b([0-9]+)\b/, type: "decimal" },
{ pattern: /^(\".*\")/, type: "string" },
{ pattern: /^(:[0-9A-Za-z_]+)/, type: "label_def" },
{ pattern: /^\b(POP|PUSH|PEEK|DAT)\b/i, type: "reserved_word" },
{ pattern: /^\b(SET|ADD|SUB|MUL|MLI|DIV|DVI|JSR)\b/i,
type: "command" },
{ pattern: /^\b([ABCXYZIJ]|SP|PC|EX)\b/i, type: "register" },
{ pattern: /^\b([0-9A-Za-z_]+)\b/, type: "label_ref" },
{ pattern: /^(\[)/, type: "open_bracket" },
{ pattern: /^(\])/, type: "close_bracket" },
{ pattern: /^(,)/, type: "comma" },
{ pattern: /^(\+|\-|\*)/, type: "operator" },
{ pattern: /^([\s]+)/, type: "space" },
],

tokenize: function(input) {

var lines = input.split("\n");
var tokenizedLines = [];
for(var i = 0; i < lines.length; i++) {
var line = lines[i];
var tokenizedLine = [];

while(line != null && line.length > 0) {

//console.log("tokenizing ", line);

var lexeme = null;
var match = null;
var token = null;

for(var p = 0; p < this.tokens.length; p++) {
token = this.tokens[p];
match = token.pattern.exec(line);
if(match) break;
}

if(match && match[1].length > 0) {
//console.log("token", match);

lexeme = match[1];
tokenizedLine.push( { lexeme: lexeme, type: token.type } );

line = line.substr(lexeme.length)
}
else {
throw ("Invlid token '" + line + "' on line " + (i+1));
line = null;
}
}
if(tokenizedLine.length > 0)
tokenizedLines.push(tokenizedLine);
}
return tokenizedLines;
},

htmlFormatTokens: function(tokenizedLines) {
var html = "";
for(var i = 0; i < tokenizedLines.length; i++) {
var tokenizedLine = tokenizedLines[i];
for(var j = 0; j < tokenizedLine.length; j++) {
var token = tokenizedLine[j];
html += this.formatToken(token);
}
html += "<br/>";
}
return html;
},

formatToken: function(token) {
var str = token.lexeme.replace(/ /g, "&nbsp;");
return "<span class='" + token.type + "'>" + str + "</span>";
}

}
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