853 lines
29 KiB
TypeScript
853 lines
29 KiB
TypeScript
import { base64_encode } from '../base64';
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import type { byte, Card, ReadonlyUint8Array } from '../types';
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import {
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DISK_PROCESSED,
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DriveNumber,
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DRIVE_NUMBERS,
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FloppyDisk,
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FloppyFormat,
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FormatWorkerMessage,
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FormatWorkerResponse,
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isNibbleDisk,
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isNoFloppyDisk,
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isWozDisk,
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JSONDisk,
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MassStorage,
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MassStorageData,
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NibbleDisk,
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NibbleFormat,
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NO_DISK,
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PROCESS_BINARY,
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PROCESS_JSON,
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PROCESS_JSON_DISK,
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SupportedSectors,
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WozDisk,
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} from '../formats/types';
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import { createDisk, createDiskFromJsonDisk } from '../formats/create_disk';
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import {
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jsonDecode,
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jsonEncode,
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readSector,
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_D13O,
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_DO,
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_PO,
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} from '../formats/format_utils';
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import Apple2IO from '../apple2io';
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import { BOOTSTRAP_ROM_13, BOOTSTRAP_ROM_16 } from '../roms/cards/disk2';
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import { EmptyDriver } from './drivers/EmptyDriver';
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import { NibbleDiskDriver } from './drivers/NibbleDiskDriver';
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import {
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ControllerState,
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DiskDriver,
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Drive,
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DriverState,
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Phase,
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} from './drivers/types';
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import { WozDiskDriver } from './drivers/WozDiskDriver';
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/** Softswitch locations */
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const LOC = {
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// Disk II Controller Commands
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// See Understanding the Apple IIe, Table 9.1
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PHASE0OFF: 0x80, // Q0L: Phase 0 OFF
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PHASE0ON: 0x81, // Q0H: Phase 0 ON
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PHASE1OFF: 0x82, // Q1L: Phase 1 OFF
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PHASE1ON: 0x83, // Q1H: Phase 1 ON
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PHASE2OFF: 0x84, // Q2L: Phase 2 OFF
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PHASE2ON: 0x85, // Q2H: Phase 2 ON
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PHASE3OFF: 0x86, // Q3L: Phase 3 OFF
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PHASE3ON: 0x87, // Q3H: Phase 3 ON
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DRIVEOFF: 0x88, // Q4L: Drives OFF
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DRIVEON: 0x89, // Q4H: Selected drive ON
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DRIVE1: 0x8a, // Q5L: Select drive 1
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DRIVE2: 0x8b, // Q5H: Select drive 2
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DRIVEREAD: 0x8c, // Q6L: Shift while writing; read data
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DRIVEWRITE: 0x8d, // Q6H: Load while writing; read write protect
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DRIVEREADMODE: 0x8e, // Q7L: Read
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DRIVEWRITEMODE: 0x8f, // Q7H: Write
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} as const;
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/** Logic state sequencer ROM */
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// See Understanding the Apple IIe, Table 9.3 Logic State Sequencer Commands
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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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// prettier-ignore
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const SEQUENCER_ROM_13 = [
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// See Understanding the Apple IIe, Figure 9.10 The DOS 3.2 Logic State Sequencer
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// Note that the column order here is NOT the same as in Figure 9.10 for Q7 H (Write).
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//
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// Q7 L (Read) Q7 H (Write)
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// Q6 L (Shift) Q6 H (Load) 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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0xD8, 0x18, 0x18, 0x08, 0x0A, 0x0A, 0x0A, 0x0A, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, // 0
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0xD8, 0x2D, 0x28, 0x28, 0x0A, 0x0A, 0x0A, 0x0A, 0x28, 0x28, 0x28, 0x28, 0x28, 0x28, 0x28, 0x28, // 1
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0xD8, 0x38, 0x38, 0x38, 0x0A, 0x0A, 0x0A, 0x0A, 0x39, 0x39, 0x39, 0x39, 0x3B, 0x3B, 0x3B, 0x3B, // 2
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0xD8, 0x48, 0xD8, 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, 0x09, 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, 0x39, 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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0x1D, 0x0D, 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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] as const;
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// prettier-ignore
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const SEQUENCER_ROM_16 = [
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// See Understanding the Apple IIe, Figure 9.11 The DOS 3.3 Logic State Sequencer
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// Note that the column order here is NOT the same as in Figure 9.11 for Q7 H (Write).
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//
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// Q7 L (Read) Q7 H (Write)
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// Q6 L (Shift) Q6 H (Load) 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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] as const;
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/** Contents of the P6 sequencer ROM. */
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export const SEQUENCER_ROM: Record<SupportedSectors, ReadonlyArray<byte>> = {
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13: SEQUENCER_ROM_13,
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16: SEQUENCER_ROM_16,
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} as const;
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/** Contents of the P5 ROM at 0xCnXX. */
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const BOOTSTRAP_ROM: Record<SupportedSectors, ReadonlyUint8Array> = {
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13: BOOTSTRAP_ROM_13,
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16: BOOTSTRAP_ROM_16,
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} as const;
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/**
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* How far the head moves, in quarter tracks, when in phase X and phase Y is
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* activated. For example, if in phase 0 (top row), turning on phase 3 would
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* step backwards a quarter track while turning on phase 2 would step forwards
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* a half track.
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*
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* Note that this emulation is highly simplified as it only takes into account
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* the order that coils are powered on and ignores when they are powered off.
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* The actual hardware allows for multiple coils to be powered at the same time
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* providing different levels of torque on the head arm. Along with that, the
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* RWTS uses a complex delay system to drive the coils faster based on expected
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* head momentum.
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*
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* Examining the https://computerhistory.org/blog/apple-ii-dos-source-code/,
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* one finds the SEEK routine on line 4831 of `appdos31.lst`. It uses `ONTABLE`
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* and `OFFTABLE` (each 12 bytes) to know exactly how many microseconds to
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* power on/off each coil as the head accelerates. At the end, the final coil
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* is left powered on 9.5 milliseconds to ensure the head has settled.
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*
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* https://embeddedmicro.weebly.com/apple-2iie.html shows traces of the boot
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* seek (which is slightly different) and a regular seek.
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*/
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const 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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] as const;
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/** Callbacks triggered by events of the drive or controller. */
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export interface Callbacks {
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/** Called when a drive turns on or off. */
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driveLight: (driveNo: DriveNumber, on: boolean) => void;
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/**
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* Called when a disk has been written to. For performance and integrity,
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* this is only called when the drive stops spinning or is removed from
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* the drive.
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*/
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dirty: (driveNo: DriveNumber, dirty: boolean) => void;
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/** Called when a disk is inserted or removed from the drive. */
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label: (driveNo: DriveNumber, name?: string, side?: string) => void;
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}
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interface DriveState {
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disk: FloppyDisk;
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driver: DriverState;
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readOnly: boolean;
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track: byte;
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head: byte;
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phase: Phase;
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dirty: boolean;
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}
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/** State of the controller for saving/restoring. */
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interface State {
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drives: DriveState[];
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controllerState: ControllerState;
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}
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function getDiskState(disk: FloppyDisk): FloppyDisk {
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if (isNoFloppyDisk(disk)) {
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const { encoding, metadata, readOnly } = disk;
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return {
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encoding,
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metadata: { ...metadata },
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readOnly,
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};
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}
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if (isNibbleDisk(disk)) {
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const { format, encoding, metadata, readOnly, volume, tracks } = disk;
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const result: NibbleDisk = {
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format,
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encoding,
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volume,
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tracks: [],
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readOnly,
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metadata: { ...metadata },
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};
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for (let idx = 0; idx < tracks.length; idx++) {
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result.tracks.push(new Uint8Array(tracks[idx]));
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}
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return result;
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}
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if (isWozDisk(disk)) {
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const { format, encoding, metadata, readOnly, trackMap, rawTracks } =
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disk;
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const result: WozDisk = {
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format,
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encoding,
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readOnly,
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trackMap: [],
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rawTracks: [],
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metadata: { ...metadata },
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info: disk.info,
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};
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result.trackMap = [...trackMap];
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for (let idx = 0; idx < rawTracks.length; idx++) {
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result.rawTracks.push(new Uint8Array(rawTracks[idx]));
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}
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return result;
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}
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throw new Error('Unknown drive state');
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}
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/**
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* Emulates the 16-sector and 13-sector versions of the Disk ][ drive and controller.
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*/
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export default class DiskII implements Card<State>, MassStorage<NibbleFormat> {
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private drives: Record<DriveNumber, Drive> = {
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1: {
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// Drive 1
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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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2: {
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// Drive 2
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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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};
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private disks: Record<DriveNumber, FloppyDisk> = {
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1: {
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encoding: NO_DISK,
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readOnly: false,
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metadata: { name: 'Disk 1' },
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},
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2: {
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encoding: NO_DISK,
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readOnly: false,
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metadata: { name: 'Disk 2' },
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},
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};
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private driver: Record<DriveNumber, DiskDriver> = {
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1: new EmptyDriver(this.drives[1]),
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2: new EmptyDriver(this.drives[2]),
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};
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private state: ControllerState;
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/** Drive off timeout id or null. */
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private offTimeout: number | null = null;
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/** Current drive object. Must only be set by `updateActiveDrive()`. */
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private curDrive: Drive;
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/** Current driver object. Must only be set by `updateAcivetDrive()`. */
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private curDriver: DiskDriver;
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private worker: Worker;
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/** Builds a new Disk ][ card. */
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constructor(
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private io: Apple2IO,
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private callbacks: Callbacks,
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private sectors: SupportedSectors = 16
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) {
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this.debug('Disk ][');
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this.state = {
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sectors,
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bus: 0,
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latch: 0,
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driveNo: 1,
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on: false,
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q6: false,
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q7: false,
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clock: 0,
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// From the example in UtA2e, p. 9-29, col. 1, para. 1., this is
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// essentially the start of the sequencer loop and produces
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// correctly synced nibbles immediately. Starting at state 0
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// would introduce a spurrious 1 in the latch at the beginning,
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// which requires reading several more sync bytes to sync up.
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state: 2,
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};
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this.updateActiveDrive();
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this.initWorker();
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}
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/** Updates the active drive based on the controller state. */
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private updateActiveDrive() {
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this.curDrive = this.drives[this.state.driveNo];
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this.curDriver = this.driver[this.state.driveNo];
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}
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private debug(..._args: unknown[]) {
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// debug(..._args);
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}
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public head(): number {
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return this.curDrive.head;
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}
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/**
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* Sets whether the head positioning stepper motor coil for the given
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* phase is on or off. Normally, the motor must be stepped two phases
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* per track. Half tracks can be written by stepping only once; quarter
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* tracks by activating two neighboring coils at once.
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*/
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private setPhase(phase: Phase, on: boolean) {
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// According to Sather, UtA2e, p. 9-12, Drive On/Off and Drive
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// Select:
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// Turning a drive on ($C089,X) [...]:
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// 1. [...]
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// 5. [...] enables head positioning [...]
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//
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// Therefore do nothing if no drive is on.
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if (!this.state.on) {
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this.debug(`ignoring phase ${phase}${on ? ' on' : ' off'}`);
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return;
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}
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this.debug(`phase ${phase}${on ? ' on' : ' off'}`);
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if (on) {
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this.curDrive.track += PHASE_DELTA[this.curDrive.phase][phase] * 2;
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this.curDrive.phase = phase;
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}
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this.curDriver.clampTrack();
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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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}
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private access(off: byte, val?: byte) {
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const state = this.state;
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let result = 0;
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|
const readMode = val === undefined;
|
|
|
|
switch (off & 0x8f) {
|
|
case LOC.PHASE0OFF: // 0x00
|
|
this.setPhase(0, false);
|
|
break;
|
|
case LOC.PHASE0ON: // 0x01
|
|
this.setPhase(0, true);
|
|
break;
|
|
case LOC.PHASE1OFF: // 0x02
|
|
this.setPhase(1, false);
|
|
break;
|
|
case LOC.PHASE1ON: // 0x03
|
|
this.setPhase(1, true);
|
|
break;
|
|
case LOC.PHASE2OFF: // 0x04
|
|
this.setPhase(2, false);
|
|
break;
|
|
case LOC.PHASE2ON: // 0x05
|
|
this.setPhase(2, true);
|
|
break;
|
|
case LOC.PHASE3OFF: // 0x06
|
|
this.setPhase(3, false);
|
|
break;
|
|
case LOC.PHASE3ON: // 0x07
|
|
this.setPhase(3, true);
|
|
break;
|
|
|
|
case LOC.DRIVEOFF: // 0x08
|
|
if (!this.offTimeout) {
|
|
if (state.on) {
|
|
// TODO(flan): This is fragile because it relies on
|
|
// wall-clock time instead of emulator time.
|
|
this.offTimeout = window.setTimeout(() => {
|
|
this.debug('Drive Off');
|
|
state.on = false;
|
|
this.callbacks.driveLight(state.driveNo, false);
|
|
this.curDriver.onDriveOff();
|
|
}, 1000);
|
|
}
|
|
}
|
|
break;
|
|
case LOC.DRIVEON: // 0x09
|
|
if (this.offTimeout) {
|
|
// TODO(flan): Fragile—see above
|
|
window.clearTimeout(this.offTimeout);
|
|
this.offTimeout = null;
|
|
}
|
|
if (!state.on) {
|
|
this.debug('Drive On');
|
|
state.on = true;
|
|
this.callbacks.driveLight(state.driveNo, true);
|
|
this.curDriver.onDriveOn();
|
|
}
|
|
break;
|
|
|
|
case LOC.DRIVE1: // 0x0a
|
|
this.debug('Disk 1');
|
|
state.driveNo = 1;
|
|
this.updateActiveDrive();
|
|
if (state.on) {
|
|
this.callbacks.driveLight(2, false);
|
|
this.callbacks.driveLight(1, true);
|
|
}
|
|
break;
|
|
case LOC.DRIVE2: // 0x0b
|
|
this.debug('Disk 2');
|
|
state.driveNo = 2;
|
|
this.updateActiveDrive();
|
|
if (state.on) {
|
|
this.callbacks.driveLight(1, false);
|
|
this.callbacks.driveLight(2, true);
|
|
}
|
|
break;
|
|
|
|
case LOC.DRIVEREAD: // 0x0c (Q6L) Shift
|
|
state.q6 = false;
|
|
this.curDriver.onQ6Low();
|
|
break;
|
|
|
|
case LOC.DRIVEWRITE: // 0x0d (Q6H) LOAD
|
|
state.q6 = true;
|
|
this.curDriver.onQ6High(readMode);
|
|
break;
|
|
|
|
case LOC.DRIVEREADMODE: // 0x0e (Q7L)
|
|
this.debug('Read Mode');
|
|
state.q7 = false;
|
|
break;
|
|
case LOC.DRIVEWRITEMODE: // 0x0f (Q7H)
|
|
this.debug('Write Mode');
|
|
state.q7 = true;
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
|
|
this.tick();
|
|
|
|
if (readMode) {
|
|
// According to UtAIIe, p. 9-13 to 9-14, any even address can be
|
|
// used to read the data register onto the CPU bus, although some
|
|
// also cause conflicts with the disk controller commands.
|
|
if ((off & 0x01) === 0) {
|
|
result = state.latch;
|
|
} else {
|
|
result = 0;
|
|
}
|
|
} else {
|
|
// It's not explicitly stated, but writes to any address set the
|
|
// data register.
|
|
state.bus = val;
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
private updateDirty(driveNo: DriveNumber, dirty: boolean) {
|
|
this.drives[driveNo].dirty = dirty;
|
|
if (this.callbacks.dirty) {
|
|
this.callbacks.dirty(driveNo, dirty);
|
|
}
|
|
}
|
|
|
|
ioSwitch(off: byte, val?: byte) {
|
|
return this.access(off, val);
|
|
}
|
|
|
|
read(_page: byte, off: byte) {
|
|
return BOOTSTRAP_ROM[this.sectors][off];
|
|
}
|
|
|
|
write() {
|
|
// not writable
|
|
}
|
|
|
|
reset() {
|
|
const state = this.state;
|
|
if (state.on) {
|
|
this.callbacks.driveLight(state.driveNo, false);
|
|
state.q7 = false;
|
|
state.on = false;
|
|
state.driveNo = 1;
|
|
}
|
|
this.updateActiveDrive();
|
|
}
|
|
|
|
tick() {
|
|
this.curDriver.tick();
|
|
}
|
|
|
|
private getDriveState(driveNo: DriveNumber): DriveState {
|
|
const curDrive = this.drives[driveNo];
|
|
const curDisk = this.disks[driveNo];
|
|
const curDriver = this.driver[driveNo];
|
|
const { readOnly, track, head, phase, dirty } = curDrive;
|
|
return {
|
|
disk: getDiskState(curDisk),
|
|
driver: curDriver.getState(),
|
|
readOnly,
|
|
track,
|
|
head,
|
|
phase,
|
|
dirty,
|
|
};
|
|
}
|
|
|
|
getState(): State {
|
|
const result = {
|
|
drives: [] as DriveState[],
|
|
controllerState: { ...this.state },
|
|
};
|
|
result.drives[1] = this.getDriveState(1);
|
|
result.drives[2] = this.getDriveState(2);
|
|
|
|
return result;
|
|
}
|
|
|
|
private setDriveState(driveNo: DriveNumber, state: DriveState) {
|
|
const { track, head, phase, readOnly, dirty } = state;
|
|
this.drives[driveNo] = {
|
|
track,
|
|
head,
|
|
phase,
|
|
readOnly,
|
|
dirty,
|
|
};
|
|
const disk = getDiskState(state.disk);
|
|
this.setDiskInternal(driveNo, disk);
|
|
this.driver[driveNo].setState(state.driver);
|
|
}
|
|
|
|
setState(state: State) {
|
|
this.state = { ...state.controllerState };
|
|
for (const d of DRIVE_NUMBERS) {
|
|
this.setDriveState(d, state.drives[d]);
|
|
const { name, side } = state.drives[d].disk.metadata;
|
|
const { dirty } = state.drives[d];
|
|
this.callbacks.label(d, name, side);
|
|
this.callbacks.driveLight(d, this.state.on);
|
|
this.callbacks.dirty(d, dirty);
|
|
}
|
|
this.updateActiveDrive();
|
|
}
|
|
|
|
getMetadata(driveNo: DriveNumber) {
|
|
const { track, head, phase, readOnly, dirty } = this.drives[driveNo];
|
|
return {
|
|
track,
|
|
head,
|
|
phase,
|
|
readOnly,
|
|
dirty,
|
|
};
|
|
}
|
|
|
|
/** Reads the given track and physical sector. */
|
|
rwts(driveNo: DriveNumber, track: byte, sector: byte) {
|
|
const curDisk = this.disks[driveNo];
|
|
if (!isNibbleDisk(curDisk)) {
|
|
throw new Error("Can't read WOZ disks");
|
|
}
|
|
return readSector(curDisk, track, sector);
|
|
}
|
|
|
|
/** Sets the data for `drive` from `disk`, which is expected to be JSON. */
|
|
// TODO(flan): This implementation is not very safe.
|
|
setDisk(driveNo: DriveNumber, jsonDisk: JSONDisk) {
|
|
if (this.worker) {
|
|
const message: FormatWorkerMessage = {
|
|
type: PROCESS_JSON_DISK,
|
|
payload: {
|
|
driveNo: driveNo,
|
|
jsonDisk,
|
|
},
|
|
};
|
|
this.worker.postMessage(message);
|
|
return true;
|
|
} else {
|
|
const disk = createDiskFromJsonDisk(jsonDisk);
|
|
if (disk) {
|
|
this.insertDisk(driveNo, disk);
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
getJSON(driveNo: DriveNumber, pretty: boolean = false) {
|
|
const curDisk = this.disks[driveNo];
|
|
if (!isNibbleDisk(curDisk)) {
|
|
throw new Error("Can't save WOZ disks to JSON");
|
|
}
|
|
return jsonEncode(curDisk, pretty);
|
|
}
|
|
|
|
setJSON(driveNo: DriveNumber, json: string) {
|
|
if (this.worker) {
|
|
const message: FormatWorkerMessage = {
|
|
type: PROCESS_JSON,
|
|
payload: {
|
|
driveNo: driveNo,
|
|
json,
|
|
},
|
|
};
|
|
this.worker.postMessage(message);
|
|
} else {
|
|
const disk = jsonDecode(json);
|
|
this.insertDisk(driveNo, disk);
|
|
}
|
|
return true;
|
|
}
|
|
|
|
setBinary(
|
|
driveNo: DriveNumber,
|
|
name: string,
|
|
fmt: FloppyFormat,
|
|
rawData: ArrayBuffer
|
|
) {
|
|
const readOnly = false;
|
|
const volume = 254;
|
|
const options = {
|
|
name,
|
|
rawData,
|
|
readOnly,
|
|
volume,
|
|
};
|
|
|
|
if (this.worker) {
|
|
const message: FormatWorkerMessage = {
|
|
type: PROCESS_BINARY,
|
|
payload: {
|
|
driveNo: driveNo,
|
|
fmt,
|
|
options,
|
|
},
|
|
};
|
|
this.worker.postMessage(message);
|
|
|
|
return true;
|
|
} else {
|
|
const disk = createDisk(fmt, options);
|
|
if (disk) {
|
|
this.insertDisk(driveNo, disk);
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
initWorker() {
|
|
if (!window.Worker) {
|
|
return;
|
|
}
|
|
|
|
try {
|
|
this.worker = new Worker('dist/format_worker.bundle.js');
|
|
|
|
this.worker.addEventListener(
|
|
'message',
|
|
(message: MessageEvent<FormatWorkerResponse>) => {
|
|
const { data } = message;
|
|
switch (data.type) {
|
|
case DISK_PROCESSED:
|
|
{
|
|
const { driveNo: drive, disk } = data.payload;
|
|
if (disk) {
|
|
this.insertDisk(drive, disk);
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
);
|
|
} catch (e: unknown) {
|
|
console.error(e);
|
|
}
|
|
}
|
|
|
|
private setDiskInternal(driveNo: DriveNumber, disk: FloppyDisk) {
|
|
this.disks[driveNo] = disk;
|
|
if (isNoFloppyDisk(disk)) {
|
|
this.driver[driveNo] = new EmptyDriver(this.drives[driveNo]);
|
|
} else if (isNibbleDisk(disk)) {
|
|
this.driver[driveNo] = new NibbleDiskDriver(
|
|
driveNo,
|
|
this.drives[driveNo],
|
|
disk,
|
|
this.state,
|
|
() => this.updateDirty(driveNo, true)
|
|
);
|
|
} else if (isWozDisk(disk)) {
|
|
this.driver[driveNo] = new WozDiskDriver(
|
|
driveNo,
|
|
this.drives[driveNo],
|
|
disk,
|
|
this.state,
|
|
() => this.updateDirty(driveNo, true),
|
|
this.io
|
|
);
|
|
} else {
|
|
throw new Error(`Unknown disk format ${disk.encoding}`);
|
|
}
|
|
this.updateActiveDrive();
|
|
}
|
|
|
|
private insertDisk(driveNo: DriveNumber, disk: FloppyDisk) {
|
|
this.setDiskInternal(driveNo, disk);
|
|
this.drives[driveNo].head = 0;
|
|
const { name, side } = disk.metadata;
|
|
this.updateDirty(driveNo, this.drives[driveNo].dirty);
|
|
this.callbacks.label(driveNo, name, side);
|
|
}
|
|
|
|
/**
|
|
* Returns the binary image of the non-WOZ disk in the given drive.
|
|
* For WOZ disks, this method returns `null`. If the `ext` parameter
|
|
* is supplied, the returned data will match that format or an error
|
|
* will be thrown. If the `ext` parameter is not supplied, the
|
|
* original image format for the disk in the drive will be used. If
|
|
* the current data on the disk is no longer readable in that format,
|
|
* an error will be thrown. Using `ext == 'nib'` will always return
|
|
* an image.
|
|
*/
|
|
getBinary(
|
|
driveNo: DriveNumber,
|
|
ext?: Exclude<NibbleFormat, 'woz'>
|
|
): MassStorageData | null {
|
|
const curDisk = this.disks[driveNo];
|
|
if (!isNibbleDisk(curDisk)) {
|
|
return null;
|
|
}
|
|
const { format, readOnly, tracks, volume } = curDisk;
|
|
const { name } = curDisk.metadata;
|
|
const len =
|
|
format === 'nib'
|
|
? tracks.reduce((acc, track) => acc + track.length, 0)
|
|
: this.sectors * tracks.length * 256;
|
|
const data = new Uint8Array(len);
|
|
|
|
ext = ext ?? format;
|
|
let idx = 0;
|
|
for (let t = 0; t < tracks.length; t++) {
|
|
if (ext === 'nib') {
|
|
data.set(tracks[t], idx);
|
|
idx += tracks[t].length;
|
|
} else {
|
|
let maxSector: SupportedSectors;
|
|
let sectorMap: typeof _PO | typeof _DO | typeof _D13O;
|
|
if (ext === 'd13') {
|
|
maxSector = 13;
|
|
sectorMap = _D13O;
|
|
} else {
|
|
maxSector = 16;
|
|
sectorMap = format === 'po' ? _PO : _DO;
|
|
}
|
|
|
|
for (let s = 0; s < maxSector; s++) {
|
|
const _s = sectorMap[s];
|
|
const sector = readSector(
|
|
{ ...curDisk, format: ext },
|
|
t,
|
|
_s
|
|
);
|
|
data.set(sector, idx);
|
|
idx += sector.length;
|
|
}
|
|
}
|
|
}
|
|
|
|
return {
|
|
ext,
|
|
metadata: { name },
|
|
data: data.buffer,
|
|
readOnly,
|
|
volume,
|
|
};
|
|
}
|
|
|
|
// TODO(flan): Does not work with WOZ or D13 disks
|
|
getBase64(driveNo: DriveNumber) {
|
|
const curDisk = this.disks[driveNo];
|
|
if (!isNibbleDisk(curDisk)) {
|
|
return null;
|
|
}
|
|
const data: string[][] | string[] = [];
|
|
for (let t = 0; t < curDisk.tracks.length; t++) {
|
|
if (isNibbleDisk(curDisk)) {
|
|
data[t] = base64_encode(curDisk.tracks[t]);
|
|
} else {
|
|
const track: string[] = [];
|
|
for (let s = 0; s < 0x10; s++) {
|
|
track[s] = base64_encode(readSector(curDisk, t, s));
|
|
}
|
|
data[t] = track;
|
|
}
|
|
}
|
|
return data;
|
|
}
|
|
}
|