apple2js/js/cards/smartport.ts
Will Scullin ce3631f3a2
Refactor disk parsing into webworker (#83)
* Refactor disk handling to allow disk processing to happen in a worker
* Type cleanup
* Convert format handlers to TypeScript
* Convert CFFA to TypeScript
2021-07-06 17:04:02 -07:00

476 lines
14 KiB
TypeScript

/* 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.
*/
import { debug, toHex } from '../util';
import { rom as smartPortRom } from '../roms/cards/smartport';
import { Card, Restorable, byte, word, rom } from '../types';
import { MassStorage, BlockDisk, ENCODING_BLOCK } from '../formats/types';
import CPU6502, { CpuState, flags } from '../cpu6502';
import { read2MGHeader } from '../formats/2mg';
import createBlockDisk from '../formats/block';
export interface SmartPortState {
disks: BlockDisk[]
}
export interface SmartPortOptions {
block: boolean;
}
class Address {
lo: byte;
hi: byte;
constructor(private cpu: CPU6502, a: byte | word, b?: byte) {
if (b === undefined) {
this.lo = a & 0xff;
this.hi = a >> 8;
} else {
this.lo = a;
this.hi = b;
}
}
loByte() {
return this.lo;
}
hiByte() {
return this.hi;
}
inc(val: byte) {
return new Address(this.cpu, ((this.hi << 8 | this.lo) + val) & 0xffff);
}
readByte() {
return this.cpu.read(this.hi, this.lo);
}
readWord() {
const readLo = this.readByte();
const readHi = this.inc(1).readByte();
return readHi << 8 | readLo;
}
readAddress() {
const readLo = this.readByte();
const readHi = this.inc(1).readByte();
return new Address(this.cpu, readLo, readHi);
}
writeByte(val: byte) {
this.cpu.write(this.hi, this.lo, val);
}
writeWord(val: word) {
this.writeByte(val & 0xff);
this.inc(1).writeByte(val >> 8);
}
writeAddress(val: Address) {
this.writeByte(val.loByte());
this.inc(1).writeByte(val.hiByte());
}
toString() {
return '$' + toHex(this.hi) + toHex(this.lo);
}
}
// ProDOS zero page locations
const COMMAND = 0x42;
const UNIT = 0x43;
const ADDRESS_LO = 0x44;
// const ADDRESS_HI = 0x45;
const BLOCK_LO = 0x46;
// const BLOCK_HI = 0x47;
export default class SmartPort implements Card, MassStorage, Restorable<SmartPortState> {
private rom: rom;
private disks: BlockDisk[] = [];
constructor(private cpu: CPU6502, options: SmartPortOptions) {
if (options?.block) {
const dumbPortRom = new Uint8Array(smartPortRom);
dumbPortRom[0x07] = 0x3C;
this.rom = dumbPortRom;
debug('DumbPort card');
} else {
debug('SmartPort card');
this.rom = smartPortRom;
}
}
private debug(..._args: any[]) {
// debug.apply(this, arguments);
}
/*
* dumpBlock
*/
dumpBlock(drive: number, block: number) {
let result = '';
let b;
let jdx;
for (let idx = 0; idx < 32; idx++) {
result += toHex(idx << 4, 4) + ': ';
for (jdx = 0; jdx < 16; jdx++) {
b = this.disks[drive].blocks[block][idx * 16 + jdx];
if (jdx == 8) {
result += ' ';
}
result += toHex(b) + ' ';
}
result += ' ';
for (jdx = 0; jdx < 16; jdx++) {
b = this.disks[drive].blocks[block][idx * 16 + jdx] & 0x7f;
if (jdx == 8) {
result += ' ';
}
if (b >= 0x20 && b < 0x7f) {
result += String.fromCharCode(b);
} else {
result += '.';
}
}
result += '\n';
}
return result;
}
/*
* getDeviceInfo
*/
getDeviceInfo(state: CpuState, drive: number) {
if (this.disks[drive]) {
const blocks = this.disks[drive].blocks.length;
state.x = blocks & 0xff;
state.y = blocks >> 8;
state.a = 0;
state.s &= ~flags.C;
} else {
state.a = 0x28;
state.s |= flags.C;
}
}
/*
* readBlock
*/
readBlock(state: CpuState, drive: number, block: number, buffer: Address) {
this.debug('read drive=' + drive);
this.debug('read buffer=' + buffer);
this.debug('read block=$' + toHex(block));
if (!this.disks[drive]?.blocks.length) {
debug('Drive', drive, 'is empty');
return;
}
// debug('read', '\n' + dumpBlock(drive, block));
for (let idx = 0; idx < 512; idx++) {
buffer.writeByte(this.disks[drive].blocks[block][idx]);
buffer = buffer.inc(1);
}
state.a = 0;
state.s &= 0xfe;
}
/*
* writeBlock
*/
writeBlock(state: CpuState, drive: number, block: number, buffer: Address) {
this.debug('write drive=' + drive);
this.debug('write buffer=' + buffer);
this.debug('write block=$' + toHex(block));
if (!this.disks[drive]?.blocks.length) {
debug('Drive', drive, 'is empty');
return;
}
// debug('write', '\n' + dumpBlock(drive, block));
for (let idx = 0; idx < 512; idx++) {
this.disks[drive].blocks[block][idx] = buffer.readByte();
buffer = buffer.inc(1);
}
state.a = 0;
state.s &= 0xfe;
}
/*
* formatDevice
*/
formatDevice(state: CpuState, drive: number) {
for (let idx = 0; idx < this.disks[drive].blocks.length; idx++) {
this.disks[drive].blocks[idx] = new Uint8Array();
for (let jdx = 0; jdx < 512; jdx++) {
this.disks[drive].blocks[idx][jdx] = 0;
}
}
state.a = 0;
state.s &= 0xfe;
}
private access(off: byte, val: byte) {
let result;
const readMode = val === undefined;
switch (off & 0x8f) {
case 0x80:
if (readMode) {
result = 0;
for (let idx = 0; idx < this.disks.length; idx++) {
result <<= 1;
if (this.disks[idx]) {
result |= 0x01;
}
}
}
break;
}
return result;
}
/*
* Interface
*/
ioSwitch(off: byte, val: byte) {
return this.access(off, val);
}
read(_page: byte, off: byte) {
const state = this.cpu.getState();
let cmd;
let unit;
let buffer;
let block;
const blockOff = this.rom[0xff];
const smartOff = blockOff + 3;
if (off === blockOff && this.cpu.getSync()) { // Regular block device entry POINT
this.debug('block device entry');
cmd = this.cpu.read(0x00, COMMAND);
unit = this.cpu.read(0x00, UNIT);
const bufferAddr = new Address(this.cpu, ADDRESS_LO);
const blockAddr = new Address(this.cpu, BLOCK_LO);
const drive = (unit & 0x80) ? 2 : 1;
const driveSlot = (unit & 0x70) >> 4;
buffer = bufferAddr.readAddress();
block = blockAddr.readWord();
this.debug('cmd=' + cmd);
this.debug('unit=$' + toHex(unit));
this.debug('slot=' + driveSlot + ' drive=' + drive);
this.debug('buffer=' + buffer + ' block=$' + toHex(block));
switch (cmd) {
case 0: // INFO
this.getDeviceInfo(state, drive);
break;
case 1: // READ
this.readBlock(state, drive, block, buffer);
break;
case 2: // WRITE
this.writeBlock(state, drive, block, buffer);
break;
case 3: // FORMAT
this.formatDevice(state, unit);
break;
}
} else if (off == smartOff && this.cpu.getSync()) {
this.debug('smartport entry');
const stackAddr = new Address(this.cpu, state.sp + 1, 0x01);
let blocks;
const retVal = stackAddr.readAddress();
this.debug('return=' + retVal);
const cmdBlockAddr = retVal.inc(1);
cmd = cmdBlockAddr.readByte();
const cmdListAddr = cmdBlockAddr.inc(1).readAddress();
this.debug('cmd=' + cmd);
this.debug('cmdListAddr=' + cmdListAddr);
stackAddr.writeAddress(retVal.inc(3));
const parameterCount = cmdListAddr.readByte();
unit = cmdListAddr.inc(1).readByte();
buffer = cmdListAddr.inc(2).readAddress();
let status;
this.debug('parameterCount=' + parameterCount);
switch (cmd) {
case 0x00: // INFO
status = cmdListAddr.inc(4).readByte();
this.debug('info unit=' + unit);
this.debug('info buffer=' + buffer);
this.debug('info status=' + status);
switch (unit) {
case 0:
switch (status) {
case 0:
buffer.writeByte(1); // one device
buffer.inc(1).writeByte(1 << 6); // no interrupts
buffer.inc(2).writeByte(0); // reserved
buffer.inc(3).writeByte(0); // reserved
buffer.inc(4).writeByte(0); // reserved
buffer.inc(5).writeByte(0); // reserved
buffer.inc(6).writeByte(0); // reserved
buffer.inc(7).writeByte(0); // reserved
state.x = 8;
state.y = 0;
state.a = 0;
state.s &= 0xfe;
break;
}
break;
default: // Unit 1
switch (status) {
case 0:
blocks = this.disks[unit].blocks.length;
buffer.writeByte(0xf0); // W/R Block device in drive
buffer.inc(1).writeByte(blocks & 0xff); // 1600 blocks
buffer.inc(2).writeByte((blocks & 0xff00) >> 8);
buffer.inc(3).writeByte((blocks & 0xff0000) >> 16);
state.x = 4;
state.y = 0;
state.a = 0;
state.s &= 0xfe;
break;
}
break;
}
state.a = 0;
state.s &= 0xfe;
break;
case 0x01: // READ BLOCK
block = cmdListAddr.inc(4).readWord();
this.readBlock(state, unit, block, buffer);
break;
case 0x02: // WRITE BLOCK
block = cmdListAddr.inc(4).readWord();
this.writeBlock(state, unit, block, buffer);
break;
case 0x03: // FORMAT
this.formatDevice(state, unit);
break;
case 0x04: // CONTROL
break;
case 0x05: // INIT
break;
case 0x06: // OPEN
break;
case 0x07: // CLOSE
break;
case 0x08: // READ
break;
case 0x09: // WRITE
break;
}
}
this.cpu.setState(state);
return this.rom[off];
}
write() {
}
getState() {
return {
disks: this.disks.map(
(disk) => {
const result: BlockDisk = {
blocks: disk.blocks.map(
(block) => new Uint8Array(block)
),
encoding: ENCODING_BLOCK,
readOnly: disk.readOnly,
name: disk.name,
};
return result;
}
)
};
}
setState(state: SmartPortState) {
this.disks = state.disks.map(
(disk) => {
const result: BlockDisk = {
blocks: disk.blocks.map(
(block) => new Uint8Array(block)
),
encoding: ENCODING_BLOCK,
readOnly: disk.readOnly,
name: disk.name,
};
return result;
}
);
}
setBinary(drive: number, name: string, fmt: string, rawData: ArrayBuffer) {
const volume = 254;
const readOnly = false;
if (fmt == '2mg') {
const { bytes, offset } = read2MGHeader(rawData);
rawData = rawData.slice(offset, offset + bytes);
}
const options = {
rawData,
name,
readOnly,
volume,
};
this.disks[drive] = createBlockDisk(options);
return true;
}
}