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Enforce greater separation between core logic functions and display output

This commit is contained in:
n loewen 2023-08-03 08:10:23 +01:00
parent ac14aa37c2
commit cec80d7054
2 changed files with 23 additions and 22 deletions
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3
assemble-and-run.js
View File

@ -4,7 +4,7 @@
const fs = require('fs');
const computer = require('./simulator.js');
const assembler = require('./assembler.js');
const { logMemory } = require('./logging.js');
const { logRunningHeader, logMemory } = require('./logging.js');
const mode = process.argv[2];
@ -12,6 +12,7 @@ const mode = process.argv[2];
const filename = process.argv[3];
const inputFile_str = fs.readFileSync(filename, 'utf8');
logRunningHeader();
let machineCode;
if (mode === "debug") {
machineCode = assembler.assemble(inputFile_str);

42
simulator.js
View File

@ -1,5 +1,5 @@
const { INITIAL_IP_ADDRESS, CYCLE_LIMIT } = require('./machine.config');
const { logRunningHeader, num2hex } = require('./logging.js');
const { num2hex } = require('./logging.js');
const display = require('./display.js');
// STATE
@ -167,6 +167,11 @@ const opcodes2mnemonics = {
14: (arg) => Instructions.carry_hop(arg),
};
function startCPU(code) {
CPU.loadMemory(code);
CPU.running = true;
}
function stepCPU() {
CPU.currentInstruction.opcode = CPU.memory[CPU.IP];
CPU.currentInstruction.argument = CPU.memory[CPU.IP+1];
@ -175,37 +180,32 @@ function stepCPU() {
}
exports.runProgram = async (code, debug = false) => {
if (debug) logRunningHeader();
CPU.loadMemory(code);
CPU.running = true;
startCPU(code);
let step = 0;
while (true) {
step = step + 1;
if (CYCLE_LIMIT && (step > CYCLE_LIMIT)) { break; } // Temporary limit as a lazy way to halt infinite loops:
if (!CPU.running) break;
if (CPU.IP >= CPU.memory.length) break;
stepCPU();
console.group(`Step`);
if (!debug) console.clear();
display.printDisplay(CPU.memory);
logCPUState();
if (!debug) await new Promise(resolve => setTimeout(resolve, 75));
console.groupEnd('Step');
await logCPUState(debug);
};
}
// FUNCTIONS THAT PULL INFO FROM STATE TO DISPLAY
function logCPUState() {
console.log();
console.log('Mnemonic:', CPU.currentInstruction.mnemonic);
console.log(`Machine: $${num2hex(CPU.currentInstruction.opcode)} $${num2hex(CPU.currentInstruction.argument)}`);
console.log();
console.log( `IP: $${num2hex(CPU.IP)} Acc: $${num2hex(CPU.Acc)} CF: ${CPU.CF}  ${CPU.running ? "running" : "halted" }` );
console.log();
async function logCPUState(debug = false) {
console.group(`Step`);
if (!debug) console.clear();
display.printDisplay(CPU.memory);
console.log();
console.log('Mnemonic:', CPU.currentInstruction.mnemonic);
console.log(`Machine: $${num2hex(CPU.currentInstruction.opcode)} $${num2hex(CPU.currentInstruction.argument)}`);
console.log();
console.log(`IP: $${num2hex(CPU.IP)} Acc: $${num2hex(CPU.Acc)} CF: ${CPU.CF}  ${CPU.running ? "running" : "halted" }`);
console.log();
// Pause to show animated display:
if (!debug) await new Promise(resolve => setTimeout(resolve, 75));
console.groupEnd('Step');
};