nesly-meld/index.js

Meld a CHR back into a ROM

var fs = require('fs');
var ns = require('nesly-split');

module.exports = function (file, newChr, cb) {

    if (!file || !newChr) {
        cb(new Error("`file` and `newChr` are required"));
    }

    ns(file, function (err, data) {
        var rom = data.rom;
        var chr = data.chr;
        var size = data.chrSize;
        var start = data.chrStart;

        fs.readFile(newChr, function (error, chrBuf) {
            if (!error) {
                var oldChr = rom.slice(start, start + size);
                chrBuf.copy(oldChr);
                cb(null, rom);
            }
        });
    });
};