691 lines
21 KiB
JavaScript
691 lines
21 KiB
JavaScript
/* Copyright 2010-2019 Will Scullin <scullin@scullinsteel.com>
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*
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* Permission to use, copy, modify, distribute, and sell this software and its
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* documentation for any purpose is hereby granted without fee, provided that
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* the above copyright notice appear in all copies and that both that
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* copyright notice and this permission notice appear in supporting
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* documentation. No representations are made about the suitability of this
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* software for any purpose. It is provided "as is" without express or
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* implied warranty.
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*/
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import { base64_decode, base64_encode } from '../base64';
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import { debug, toHex } from '../util';
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import { jsonDecode, jsonEncode, readSector } from '../formats/format_utils';
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import { P5_16, P5_13 } from '../roms/cards/disk2';
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import _2MG from '../formats/2mg';
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import D13 from '../formats/d13';
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import DOS from '../formats/do';
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import ProDOS from '../formats/po';
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import Woz from '../formats/woz';
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import Nibble from '../formats/nib';
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export const DISK_TYPES = [
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'2mg',
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'd13',
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'do',
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'dsk',
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'hdv',
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'po',
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'nib',
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'woz'
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];
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export default function DiskII(io, callbacks, sectors = 16)
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{
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var _drives = [
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{ // Drive 1
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format: 'dsk',
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volume: 254,
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tracks: [],
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trackMap: null,
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rawTracks: null,
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track: 0,
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head: 0,
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phase: 0,
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readOnly: false,
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dirty: false
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},
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{ // Drive 2
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format: 'dsk',
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volume: 254,
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tracks: [],
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trackMap: null,
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rawTracks: null,
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track: 0,
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head: 0,
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phase: 0,
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readOnly: false,
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dirty: false
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}];
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var _skip = 0;
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var _bus = 0;
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var _latch = 0;
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var _offTimeout = null;
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var _q6 = 0;
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var _q7 = 0;
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var _writeMode = false; // q7
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var _on = false;
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var _drive = 1;
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var _cur = _drives[_drive - 1];
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var LOC = {
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// Disk II Stuff
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PHASE0OFF: 0x80,
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PHASE0ON: 0x81,
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PHASE1OFF: 0x82,
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PHASE1ON: 0x83,
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PHASE2OFF: 0x84,
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PHASE2ON: 0x85,
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PHASE3OFF: 0x86,
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PHASE3ON: 0x87,
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DRIVEOFF: 0x88,
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DRIVEON: 0x89,
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DRIVE1: 0x8A,
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DRIVE2: 0x8B,
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DRIVEREAD: 0x8C, // Q6L
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DRIVEWRITE: 0x8D, // Q6H
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DRIVEREADMODE: 0x8E, // Q7L
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DRIVEWRITEMODE: 0x8F // Q7H
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};
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// CODE OPERATION BEFORE AFTER
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// 0 CLR XXXXXXXX 00000000
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// 8 NOP ABCDEFGH ABCDEFGH
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// 9 SL0 ABCDEFGH BCDEFGH0
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// A SR (write protected) ABCDEFGH 11111111
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// (not write protected) ABCDEFGH 0ABCDEFG
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// B LOAD XXXXXXXX YYYYYYYY
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// D SL1 ABCDEFGH BCDEFGH1
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// Q7 Read/Write
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// Q6 Shift/Load
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var _P6 = [
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// Q7 L (Read) Q7 H (Write)
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// Q6 L Q6 H Q6 L (Shift) Q6 H (Load)
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// QA L QA H QA L QA H QA L QA H QA L QA H
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//1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0
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0x18, 0x18, 0x18, 0x18, 0x0A, 0x0A, 0x0A, 0x0A, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, // 0
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0x2D, 0x2D, 0x38, 0x38, 0x0A, 0x0A, 0x0A, 0x0A, 0x28, 0x28, 0x28, 0x28, 0x28, 0x28, 0x28, 0x28, // 1
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0xD8, 0x38, 0x08, 0x28, 0x0A, 0x0A, 0x0A, 0x0A, 0x39, 0x39, 0x39, 0x39, 0x3B, 0x3B, 0x3B, 0x3B, // 2
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0xD8, 0x48, 0x48, 0x48, 0x0A, 0x0A, 0x0A, 0x0A, 0x48, 0x48, 0x48, 0x48, 0x48, 0x48, 0x48, 0x48, // 3
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0xD8, 0x58, 0xD8, 0x58, 0x0A, 0x0A, 0x0A, 0x0A, 0x58, 0x58, 0x58, 0x58, 0x58, 0x58, 0x58, 0x58, // 4
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0xD8, 0x68, 0xD8, 0x68, 0x0A, 0x0A, 0x0A, 0x0A, 0x68, 0x68, 0x68, 0x68, 0x68, 0x68, 0x68, 0x68, // 5
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0xD8, 0x78, 0xD8, 0x78, 0x0A, 0x0A, 0x0A, 0x0A, 0x78, 0x78, 0x78, 0x78, 0x78, 0x78, 0x78, 0x78, // 6
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0xD8, 0x88, 0xD8, 0x88, 0x0A, 0x0A, 0x0A, 0x0A, 0x08, 0x08, 0x88, 0x88, 0x08, 0x08, 0x88, 0x88, // 7
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0xD8, 0x98, 0xD8, 0x98, 0x0A, 0x0A, 0x0A, 0x0A, 0x98, 0x98, 0x98, 0x98, 0x98, 0x98, 0x98, 0x98, // 8
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0xD8, 0x29, 0xD8, 0xA8, 0x0A, 0x0A, 0x0A, 0x0A, 0xA8, 0xA8, 0xA8, 0xA8, 0xA8, 0xA8, 0xA8, 0xA8, // 9
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0xCD, 0xBD, 0xD8, 0xB8, 0x0A, 0x0A, 0x0A, 0x0A, 0xB9, 0xB9, 0xB9, 0xB9, 0xBB, 0xBB, 0xBB, 0xBB, // A
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0xD9, 0x59, 0xD8, 0xC8, 0x0A, 0x0A, 0x0A, 0x0A, 0xC8, 0xC8, 0xC8, 0xC8, 0xC8, 0xC8, 0xC8, 0xC8, // B
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0xD9, 0xD9, 0xD8, 0xA0, 0x0A, 0x0A, 0x0A, 0x0A, 0xD8, 0xD8, 0xD8, 0xD8, 0xD8, 0xD8, 0xD8, 0xD8, // C
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0xD8, 0x08, 0xE8, 0xE8, 0x0A, 0x0A, 0x0A, 0x0A, 0xE8, 0xE8, 0xE8, 0xE8, 0xE8, 0xE8, 0xE8, 0xE8, // D
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0xFD, 0xFD, 0xF8, 0xF8, 0x0A, 0x0A, 0x0A, 0x0A, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, // E
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0xDD, 0x4D, 0xE0, 0xE0, 0x0A, 0x0A, 0x0A, 0x0A, 0x88, 0x88, 0x08, 0x08, 0x88, 0x88, 0x08, 0x08 // F
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];
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function _debug() {
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// debug.apply(this, arguments);
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}
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function _init() {
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debug('Disk ][');
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}
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var _clock = 0;
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var _lastCycles = io.cycles();
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var _state = 0;
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var _zeros = 0;
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function _moveHead() {
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if (!_cur.rawTracks) {
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return;
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}
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var track = _cur.rawTracks[_cur.trackMap[_cur.track]] || [0];
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var cycles = io.cycles();
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var workCycles = (cycles - _lastCycles) * 2;
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_lastCycles = cycles;
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while (workCycles-- > 0) {
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var pulse = 0;
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if (_clock == 4) {
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pulse = track[_cur.head];
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if (!pulse) {
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if (++_zeros > 2) {
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pulse = Math.random() > 0.5 ? 1 : 0;
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}
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} else {
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_zeros = 0;
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}
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}
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var idx = 0;
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idx |= pulse ? 0x00 : 0x01;
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idx |= _latch & 0x80 ? 0x02 : 0x00;
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idx |= _q6 ? 0x04 : 0x00;
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idx |= _q7 ? 0x08 : 0x00;
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idx |= _state << 4;
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var command = _P6[idx];
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if (_on && _q7) {
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debug('clock:', _clock, 'command:', toHex(command), 'q6:', _q6);
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}
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switch (command & 0xf) {
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case 0x0: // CLR
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_latch = 0;
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break;
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case 0x8: // NOP
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break;
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case 0x9: // SL0
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_latch = (_latch << 1) & 0xff;
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break;
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case 0xA: // SR
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_latch >>= 1;
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if (_cur.readOnly) {
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_latch |= 0x80;
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}
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break;
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case 0xB: // LD
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_latch = _bus;
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debug('Loading', toHex(_latch), 'from bus');
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break;
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case 0xD: // SL1
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_latch = ((_latch << 1) | 0x01) & 0xff;
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break;
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}
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_state = command >> 4;
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if (_clock == 4) {
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if (_on) {
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if (_q7) {
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track[_cur.head] = _state & 0x8 ? 0x01 : 0x00;
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debug('Wrote', _state & 0x8 ? 0x01 : 0x00);
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}
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if (++_cur.head >= track.length) {
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_cur.head = 0;
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}
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}
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}
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if (++_clock > 7) {
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_clock = 0;
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}
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}
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}
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function _readWriteNext() {
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if (_skip || _writeMode) {
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var track = _cur.tracks[_cur.track >> 2];
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if (track && track.length) {
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if (_cur.head >= track.length) {
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_cur.head = 0;
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}
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if (_writeMode) {
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if (!_cur.readOnly) {
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track[_cur.head] = _bus;
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if (!_cur.dirty) {
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_updateDirty(_drive, true);
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}
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}
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} else {
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_latch = track[_cur.head];
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}
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++_cur.head;
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}
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} else {
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_latch = 0;
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}
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_skip = (++_skip % 2);
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}
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var _phase_delta = [
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[ 0, 1, 2,-1],
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[-1, 0, 1, 2],
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[-2,-1, 0, 1],
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[ 1,-2,-1, 0]
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];
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var _q = [false, false, false, false]; // q0-3
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function setPhase(phase, on) {
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_debug('phase ' + phase + (on ? ' on' : ' off'));
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if (_cur.rawTracks) {
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if (on) {
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var delta = _phase_delta[_cur.phase][phase] * 2;
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_cur.track += delta;
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_cur.phase = phase;
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} else {
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// foo
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}
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} else {
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if (on) {
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_cur.track += _phase_delta[_cur.phase][phase] * 2;
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_cur.phase = phase;
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}
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}
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if (_cur.track > _cur.tracks.length * 4 - 1) {
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_cur.track = _cur.tracks.length * 4 - 1;
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}
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if (_cur.track < 0x0) {
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_cur.track = 0x0;
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}
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// debug(
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// 'Drive', _drive, 'track', toHex(_cur.track >> 2) + '.' + (_cur.track & 0x3),
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// '(' + toHex(_cur.track) + ')',
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// '[' + phase + ':' + (on ? 'on' : 'off') + ']');
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_q[phase] = on;
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}
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function _access(off, val) {
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var result = 0;
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var readMode = val === undefined;
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switch (off & 0x8f) {
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case LOC.PHASE0OFF: // 0x00
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setPhase(0, false);
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break;
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case LOC.PHASE0ON: // 0x01
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setPhase(0, true);
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break;
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case LOC.PHASE1OFF: // 0x02
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setPhase(1, false);
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break;
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case LOC.PHASE1ON: // 0x03
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setPhase(1, true);
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break;
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case LOC.PHASE2OFF: // 0x04
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setPhase(2, false);
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break;
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case LOC.PHASE2ON: // 0x05
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setPhase(2, true);
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break;
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case LOC.PHASE3OFF: // 0x06
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setPhase(3, false);
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break;
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case LOC.PHASE3ON: // 0x07
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setPhase(3, true);
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break;
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case LOC.DRIVEOFF: // 0x08
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if (!_offTimeout) {
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if (_on) {
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_offTimeout = window.setTimeout(function() {
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_debug('Drive Off');
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_on = false;
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if (callbacks.driveLight) { callbacks.driveLight(_drive, false); }
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}, 1000);
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}
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}
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break;
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case LOC.DRIVEON: // 0x09
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if (_offTimeout) {
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window.clearTimeout(_offTimeout);
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_offTimeout = null;
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}
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if (!_on) {
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_debug('Drive On');
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_on = true;
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_lastCycles = io.cycles();
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if (callbacks.driveLight) { callbacks.driveLight(_drive, true); }
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}
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break;
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case LOC.DRIVE1: // 0x0a
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_debug('Disk 1');
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_drive = 1;
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_cur = _drives[_drive - 1];
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if (_on && callbacks.driveLight) {
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callbacks.driveLight(2, false);
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callbacks.driveLight(1, true);
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}
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break;
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case LOC.DRIVE2: // 0x0b
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_debug('Disk 2');
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_drive = 2;
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_cur = _drives[_drive - 1];
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if (_on && callbacks.driveLight) {
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callbacks.driveLight(1, false);
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callbacks.driveLight(2, true);
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}
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break;
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case LOC.DRIVEREAD: // 0x0c (Q6L) Shift
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_q6 = 0;
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if (_writeMode) {
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_debug('clearing _q6/SHIFT');
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}
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if (!_cur.rawTracks) {
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_readWriteNext();
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}
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break;
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case LOC.DRIVEWRITE: // 0x0d (Q6H) LOAD
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_q6 = 1;
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if (_writeMode) {
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_debug('setting _q6/LOAD');
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}
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if (!_cur.rawTracks) {
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if (readMode && !_writeMode) {
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if (_cur.readOnly) {
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_latch = 0xff;
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_debug('Setting readOnly');
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} else {
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_latch = _latch >> 1;
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_debug('Clearing readOnly');
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}
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}
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}
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break;
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case LOC.DRIVEREADMODE: // 0x0e (Q7L)
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_debug('Read Mode');
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_q7 = 0;
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_writeMode = false;
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break;
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case LOC.DRIVEWRITEMODE: // 0x0f (Q7H)
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_debug('Write Mode');
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_q7 = 1;
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_writeMode = true;
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break;
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default:
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break;
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}
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_moveHead();
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if (readMode) {
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if ((off & 0x01) === 0) {
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result = _latch;
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} else {
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result = 0;
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}
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} else {
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_bus = val;
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}
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return result;
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}
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function _updateDirty(drive, dirty) {
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_drives[drive - 1].dirty = dirty;
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if (callbacks.dirty) { callbacks.dirty(_drive, dirty); }
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}
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var _P5 = sectors == 16 ? P5_16 : P5_13;
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_init();
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return {
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ioSwitch: function disk2_ioSwitch(off, val) {
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return _access(off, val);
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},
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read: function disk2_read(page, off) {
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return _P5[off];
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},
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write: function disk2_write() {},
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reset: function disk2_reset() {
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if (_on) {
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callbacks.driveLight(_drive, false);
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_writeMode = false;
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_on = false;
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_drive = 1;
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_cur = _drives[_drive - 1];
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}
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for (var idx = 0; idx < 4; idx++) {
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_q[idx] = false;
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}
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},
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tick: function disk2_tick() {
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_moveHead();
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},
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getState: function disk2_getState() {
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function getDriveState(drive) {
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var result = {
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format: drive.format,
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volume: drive.volume,
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tracks: [],
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track: drive.track,
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head: drive.head,
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phase: drive.phase,
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readOnly: drive.readOnly,
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dirty: drive.dirty
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};
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for (var idx = 0; idx < drive.tracks.length; idx++) {
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result.tracks.push(base64_encode(drive.tracks[idx]));
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}
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return result;
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}
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var result = {
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drives: [],
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skip: _skip,
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latch: _latch,
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writeMode: _writeMode,
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on: _on,
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drive: _drive
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};
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_drives.forEach(function(drive, idx) {
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result.drives[idx] = getDriveState(drive);
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});
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return result;
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},
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setState: function disk2_setState(state) {
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function setDriveState(state) {
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var result = {
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format: state.format,
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volume: state.volume,
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tracks: [],
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track: state.track,
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head: state.head,
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phase: state.phase,
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readOnly: state.readOnly,
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dirty: state.dirty
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};
|
|
for (var idx = 0; idx < state.tracks.length; idx++) {
|
|
result.tracks.push(base64_decode(state.tracks[idx]));
|
|
}
|
|
return result;
|
|
}
|
|
state.drives.forEach(function(drive, idx) {
|
|
_drives[idx] = setDriveState(drive);
|
|
callbacks.driveLight(idx, _drive.on);
|
|
callbacks.dirty(idx, _drive.dirty);
|
|
});
|
|
_skip = state.skip;
|
|
_latch = state.latch;
|
|
_writeMode = state.writeMode;
|
|
_on = state.on;
|
|
_drive = state.drive;
|
|
_cur = _drives[_drive - 1];
|
|
},
|
|
|
|
getMetadata: function disk_getMetadata(driveNo) {
|
|
var drive = _drives[driveNo - 1];
|
|
if (drive.tracks.length) {
|
|
return {
|
|
format: drive.format,
|
|
volume: drive.volume,
|
|
track: drive.track,
|
|
head: drive.head,
|
|
phase: drive.phase,
|
|
readOnly: drive.readOnly,
|
|
dirty: drive.dirty
|
|
};
|
|
} else {
|
|
return null;
|
|
}
|
|
},
|
|
|
|
rwts: function disk2_rwts(disk, track, sector) {
|
|
var cur = _drives[disk - 1];
|
|
return readSector(cur, track, sector);
|
|
},
|
|
|
|
setDisk: function disk2_setDisk(drive, disk) {
|
|
var fmt = disk.type, readOnly = disk.readOnly;
|
|
|
|
var data, t, s;
|
|
if (disk.encoding == 'base64') {
|
|
data = [];
|
|
for (t = 0; t < disk.data.length; t++) {
|
|
if (fmt == 'nib') {
|
|
data[t] = base64_decode(disk.data[t]);
|
|
} else {
|
|
data[t] = [];
|
|
for (s = 0; s < disk.data[t].length; s++) {
|
|
data[t][s] = base64_decode(disk.data[t][s]);
|
|
}
|
|
}
|
|
}
|
|
} else {
|
|
data = disk.data;
|
|
}
|
|
var cur = _drives[drive - 1];
|
|
|
|
// var v = (fmt === 'dsk' ? data[0x11][0x00][0x06] : 0xfe);
|
|
// if (v == 0x00) {
|
|
var volume = disk.volume || 0xfe;
|
|
// }
|
|
|
|
var options = {
|
|
volume,
|
|
readOnly,
|
|
name,
|
|
data
|
|
};
|
|
|
|
switch (fmt) {
|
|
case 'd13':
|
|
disk = new D13(options);
|
|
break;
|
|
case 'do':
|
|
case 'dsk':
|
|
disk = new DOS(options);
|
|
break;
|
|
case 'nib':
|
|
disk = new Nibble(options);
|
|
break;
|
|
case 'po':
|
|
disk = new ProDOS(options);
|
|
break;
|
|
default:
|
|
return false;
|
|
}
|
|
|
|
Object.assign(cur, disk);
|
|
_updateDirty(_drive, false);
|
|
},
|
|
|
|
getJSON: function disk2_getJSON(drive, pretty) {
|
|
var cur = _drives[drive - 1];
|
|
return jsonEncode(cur, pretty);
|
|
},
|
|
|
|
setJSON: function disk2_setJSON(drive, data) {
|
|
var cur = _drives[drive - 1];
|
|
Object.assign(cur, jsonDecode(data));
|
|
return true;
|
|
},
|
|
|
|
setBinary: function disk2_setBinary(drive, name, fmt, rawData) {
|
|
var disk;
|
|
var cur = _drives[drive - 1];
|
|
var readOnly = false;
|
|
var volume = 254;
|
|
var options = {
|
|
name,
|
|
rawData,
|
|
readOnly,
|
|
volume
|
|
};
|
|
|
|
switch (fmt) {
|
|
case '2mg':
|
|
disk = new _2MG(options);
|
|
break;
|
|
case 'd13':
|
|
disk = new D13(options);
|
|
break;
|
|
case 'do':
|
|
case 'dsk':
|
|
disk = new DOS(options);
|
|
break;
|
|
case 'nib':
|
|
disk = new Nibble(options);
|
|
break;
|
|
case 'po':
|
|
disk = new ProDOS(options);
|
|
break;
|
|
case 'woz':
|
|
disk = new Woz(options);
|
|
break;
|
|
default:
|
|
return false;
|
|
}
|
|
|
|
Object.assign(cur, disk);
|
|
_updateDirty(drive, true);
|
|
return true;
|
|
},
|
|
|
|
getBinary: function disk2_getBinary(drive) {
|
|
var cur = _drives[drive - 1];
|
|
var len = (16 * cur.tracks.length * 256);
|
|
var data = new Uint8Array(len);
|
|
var idx = 0;
|
|
|
|
for (var t = 0; t < cur.tracks.length; t++) {
|
|
if (cur.format === 'nib') {
|
|
data[idx++] = cur.tracks[t];
|
|
} else {
|
|
for (var s = 0; s < 0x10; s++) {
|
|
var sector = readSector(cur, t, s);
|
|
for (var b = 0; b < 256; b++) {
|
|
data[idx++] = sector[b];
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return data;
|
|
},
|
|
|
|
getBase64: function disk2_getBase64(drive) {
|
|
var cur = _drives[drive - 1];
|
|
var data = [];
|
|
for (var t = 0; t < cur.tracks.length; t++) {
|
|
data[t] = [];
|
|
if (cur.format === 'nib') {
|
|
data += base64_encode(cur.tracks[t]);
|
|
} else {
|
|
for (var s = 0; s < 0x10; s++) {
|
|
data += base64_encode(readSector(cur, t, s));
|
|
}
|
|
}
|
|
}
|
|
return data;
|
|
}
|
|
};
|
|
}
|