Unholy abomination

index.js

const fs = require('fs');

const MOV_AH = 0xb4;
const MOV_BH = 0xb7;
const MOV_BL = 0xb3;
const MOV_AL = 0xb0;
const INT = 0xcd;
const JMP = 0xeb;


const bin = new Uint8Array(512);

const code = [
    MOV_AH, 0x0e,
    MOV_BH, 0x00,
    MOV_BL, 0x07,
    MOV_AL, 'h'.charCodeAt(0),
    INT, 0x10,
    MOV_AL, 'e'.charCodeAt(0),
    INT, 0x10,
    MOV_AL, 'l'.charCodeAt(0),
    INT, 0x10,
    MOV_AL, 'l'.charCodeAt(0),
    INT, 0x10,
    MOV_AL, 'o'.charCodeAt(0),
    INT, 0x10,
    MOV_AL, ' '.charCodeAt(0),
    INT, 0x10,
    MOV_AL, 'j'.charCodeAt(0),
    INT, 0x10,
    MOV_AL, 's'.charCodeAt(0),
    INT, 0x10,
    JMP, 0x26,
];

code.forEach((ins, index) => {
    bin[index] = ins;
});

bin[510] = 0x55;
bin[511] = 0xaa;


fs.createWriteStream("out.bin").write(Buffer.from(bin.buffer));

console.log(bin);

// run qemu-system-x86_64 out.bin