41 lines
1.4 KiB
TypeScript
41 lines
1.4 KiB
TypeScript
import { NibbleDisk, DiskOptions, ENCODING_NIBBLE, TrackSectorSource } from './types';
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import { ByteArrayArrayTrackSectorSource, ByteArrayByteSource, ByteTrackSectorSource, ProdosOrderedTrackSectorSource, TrackSector6x2NibbleTrackSource } from './sources';
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/**
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* Returns a `Disk` object from ProDOS-ordered image data.
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* @param options the disk image and options
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* @returns A nibblized disk
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*/
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export default function createDiskFromProDOS(options: DiskOptions) {
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const { data, name, side, rawData, volume, readOnly } = options;
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const disk: NibbleDisk = {
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format: 'po',
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encoding: ENCODING_NIBBLE,
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metadata: { name, side },
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volume: volume || 254,
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tracks: [],
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readOnly: readOnly || false,
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};
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let trackSectorSource: TrackSectorSource;
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if (rawData) {
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trackSectorSource =
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new ByteTrackSectorSource(
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new ByteArrayByteSource(new Uint8Array(rawData)));
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} else if (data) {
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trackSectorSource = new ByteArrayArrayTrackSectorSource(data);
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} else {
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throw new Error('Requires data or rawData');
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}
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const nibbleTrackSource =
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new TrackSector6x2NibbleTrackSource(
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new ProdosOrderedTrackSectorSource(trackSectorSource), volume);
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for (let physical_track = 0; physical_track < nibbleTrackSource.numTracks(); physical_track++) {
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disk.tracks[physical_track] = nibbleTrackSource.read(physical_track);
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}
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return disk;
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}
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