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Fix (Assembler): Pad machine code output to a full $FF bytes

This commit is contained in:
n loewen 2023-08-16 15:38:59 +01:00
parent 5fba7daf32
commit 6e897b7f74
1 changed files with 8 additions and 8 deletions
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16
assembler.js
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@ -38,8 +38,11 @@ const mnemonics2opcodes = {
function decodeInstructions(line) {
let lines = line.split(/\n/); // returns an array of lines
let machineCode = new Array(INITIAL_IP_ADDRESS).fill(0);
machineCode[POINTER_TO_START_OF_DISPLAY_MEM] = START_OF_DISPLAY_MEM;
//let machineCode = new Array(INITIAL_IP_ADDRESS).fill(0);
let machineCode = new Array(256).fill(0);
dbgExec(2, () => logMemory(new Uint8Array(machineCode)));
machineCode[POINTER_TO_DISPLAY] = DISPLAY_ADDR;
machineCode[POINTER_TO_KEYPAD] = KEYPAD_ADDR;
let labels = {};
let constants = {};
@ -174,8 +177,9 @@ function decodeInstructions(line) {
// DECODE!
const op = mnemonics2opcodes[opName][addressingMode];
machineCode.push(op);
machineCode.push(arg_num);
machineCode[IP] = op;
machineCode[IP+1] = arg_num;
dbg(3, `IP: $${num2hex(IP)}, new code: $${num2hex(op)} $${num2hex(arg_num)}`);
IP += 2;
dbgGroupEnd(1, 'Input line');
@ -198,10 +202,6 @@ function decodeInstructions(line) {
}
}
// Add an END at the end
machineCode.push('0');
machineCode.push('0');
return new Uint8Array(machineCode);
}