apple2js/js/formats/nib.js
2021-01-03 15:00:40 -08:00

42 lines
1.3 KiB
JavaScript

/* Copyright 2010-2019 Will Scullin <scullin@scullinsteel.com>
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
* the above copyright notice appear in all copies and that both that
* copyright notice and this permission notice appear in supporting
* documentation. No representations are made about the suitability of this
* software for any purpose. It is provided "as is" without express or
* implied warranty.
*/
/**
* Returns a `Disk` object from raw nibble image data.
* @param {*} options the disk image and options
* @returns {import('./format_utils').Disk}
*/
export default function Nibble(options) {
var { data, name, rawData, volume, readOnly } = options;
var disk = {
format: 'nib',
name,
volume: volume || 254,
readOnly: readOnly || false,
tracks: [],
trackMap: null,
rawTracks: null
};
for (var t = 0; t < 35; t++) {
var track;
if (rawData) {
var off = t * 0x1a00;
track = new Uint8Array(data.slice(off, off + 0x1a00));
} else {
track = data[t];
}
disk.tracks[t] = track;
}
return disk;
}