wren-8080/src/disassembler.js

An Intel 8080 disassembler

const fs = require('fs');
const { promisify } = require('util');

const { decode } = require('./decoder');

const readFile = async (path) => await promisify(fs.readFile)(path);

const disassembleFile = async (path) => {
    const content = await readFile(path);
    return disassemble(content);
};

const disassemble = (buf) => {
    const instructions = [];
    let offset = 0;
    while (offset < buf.length) {
        const instruction = decode(buf.readUInt8(offset));

        const args = {};
        for (let i = 1; i < instruction.size; i++) {
            args[`arg${instruction.size - i - 1}`] = buf.readUInt8(offset + i);
        }

        offset += instruction.size;

        instructions.push(Object.assign(instruction, args));
    }
    return instructions;
};

module.exports = {
    disassemble,
    disassembleFile
};