Apple-2-Tools/apple2js
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apple2js/js/cards/smartport.js
Will Scullin 3b95726655
Crude native woz support. (#13) 
Readonly for now.
2019-10-01 19:56:10 -07:00

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JavaScript
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/* 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 { base64_decode } from '../base64';
import { debug, toHex } from '../util';
export default function SmartPort(io, slot, cpu) {
/*
$Cn01=$20
$Cn03=$00
$Cn05=$03
$Cn07=$00
*/
var ROM = [
0xA2, 0x20, 0xA0, 0x00, 0xA2, 0x03, 0xA0, 0x3C, 0x20, 0x58, 0xFF, 0xBA, 0xBD, 0x00, 0x01, 0x0A,
0x0A, 0x0A, 0x0A, 0xAA, 0x4C, 0x01, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x60, 0x00, 0x00, 0x60, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xDF, 0x20
];
var disks = [];
function decodeDisk(unit, disk) {
disks[unit] = [];
for (var idx = 0; idx < disk.blocks.length; idx++) {
disks[unit][idx] = base64_decode(disk.blocks[idx]);
}
}
function Address() {
var lo;
var hi;
if (arguments.length == 1) {
lo = arguments[0] & 0xff;
hi = arguments[0] >> 8;
} else if (arguments.length == 2) {
lo = arguments[0];
hi = arguments[1];
}
return {
loByte: function() {
return lo;
},
hiByte: function() {
return hi;
},
inc: function(val) {
return new Address(((hi << 8 | lo) + val) & 0xffff);
},
readByte: function() {
return cpu.read(hi, lo);
},
readWord: function() {
var readLo = this.readByte();
var readHi = this.inc(1).readByte();
return readHi << 8 | readLo;
},
readAddress: function() {
var readLo = this.readByte();
var readHi = this.inc(1).readByte();
return new Address(readLo, readHi);
},
writeByte: function(val) {
cpu.write(hi, lo, val);
},
writeWord: function(val) {
this.writeByte(val & 0xff);
this.inc(1).writeByte(val >> 8);
},
writeAddress: function(val) {
this.writeByte(val.loByte());
this.inc(1).writeByte(val.hiByte());
},
toString: function() {
return '$' + toHex(hi) + toHex(lo);
}
};
}
/*
* dumpBlock
*/
/*
function dumpBlock(drive, block) {
var result = '';
var b;
var jdx;
for (var idx = 0; idx < 32; idx++) {
result += toHex(idx << 4, 4) + ': ';
for (jdx = 0; jdx < 16; jdx++) {
b = disks[drive][block][idx * 16 + jdx];
if (jdx == 8) {
result += ' ';
}
result += toHex(b) + ' ';
}
result += ' ';
for (jdx = 0; jdx < 16; jdx++) {
b = disks[drive][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
*/
function getDeviceInfo(state, drive) {
if (disks[drive]) {
var blocks = disks[drive].length;
state.x = blocks & 0xff;
state.y = blocks >> 8;
state.a = 0;
state.s &= 0xfe;
} else {
state.a = 0x28;
state.s |= 0x01;
}
}
/*
* readBlock
*/
function readBlock(state, drive, block, buffer) {
debug('read drive=' + drive);
debug('read buffer=' + buffer);
debug('read block=$' + toHex(block));
if (!disks[drive] || !disks[drive].length) {
debug('Drive', drive, 'is empty');
return;
}
// debug('read', '\n' + dumpBlock(drive, block));
for (var idx = 0; idx < 512; idx++) {
buffer.writeByte(disks[drive][block][idx]);
buffer = buffer.inc(1);
}
state.a = 0;
state.s &= 0xfe;
}
/*
* writeBlock
*/
function writeBlock(state, drive, block, buffer) {
debug('write drive=' + drive);
debug('write buffer=' + buffer);
debug('write block=$' + toHex(block));
if (!disks[drive] || !disks[drive].length) {
debug('Drive', drive, 'is empty');
return;
}
// debug('write', '\n' + dumpBlock(drive, block));
for (var idx = 0; idx < 512; idx++) {
disks[drive][block][idx] = buffer.readByte();
buffer = buffer.inc(1);
}
state.a = 0;
state.s &= 0xfe;
}
/*
* formatDevice
*/
function formatDevice(state, drive) {
for (var idx = 0; idx < disks[drive].length; idx++) {
disks[drive][idx] = [];
for (var jdx = 0; jdx < 512; jdx++) {
disks[drive][idx][jdx] = 0;
}
}
state.a = 0;
state.s &= 0xfe;
}
/*
* Interface
*/
return {
read: function(page, off, debugFlag) {
var state = cpu.getState();
var cmd;
var unit;
var buffer;
var block;
if (!debugFlag) {
debug('read $' + toHex(page) + toHex(off) + '=$' + toHex(ROM[off]), cpu.sync());
}
if (off == 0x00 && cpu.sync()) {
readBlock(state, 1, 0, new Address(0x0800));
} else if (off == 0x20 && cpu.sync()) { // Regular block device entry POINT
debug('block device entry');
cmd = cpu.read(0x00, 0x42);
unit = cpu.read(0x00, 0x43);
var bufferAddr;
var blockAddr;
var drive = (unit & 0x80) ? 2 : 1;
var driveSlot = (unit & 0x70) >> 4;
debug('cmd=' + cmd);
debug('unit=$' + toHex(unit));
debug('slot=' + driveSlot + ' drive=' + drive);
switch (cmd) {
case 0: // INFO
getDeviceInfo(state, drive);
break;
case 1: // READ
bufferAddr = new Address(0x44);
buffer = bufferAddr.readAddress();
blockAddr = new Address(0x46);
block = blockAddr.readWord();
readBlock(state, drive, block, buffer);
break;
case 2: // WRITE
bufferAddr = new Address(0x44);
buffer = bufferAddr.readAddress();
blockAddr = new Address(0x46);
block = blockAddr.readWord();
writeBlock(state, drive, block, buffer);
break;
case 3: // FORMAT
formatDevice(state, unit);
break;
}
} else if (off == 0x23 && cpu.sync()) {
debug('smartport entry');
var retVal = {};
var stackAddr = new Address(state.sp + 1, 0x01);
retVal = stackAddr.readAddress();
debug('return=' + retVal);
var cmdBlockAddr = retVal.inc(1);
cmd = cmdBlockAddr.readByte();
var cmdListAddr = cmdBlockAddr.inc(1).readAddress();
debug('cmd=' + cmd);
debug('cmdListAddr=' + cmdListAddr);
stackAddr.writeAddress(retVal.inc(3));
var parameterCount = cmdListAddr.readByte();
unit = cmdListAddr.inc(1).readByte();
buffer = cmdListAddr.inc(2).readAddress();
var status;
debug('parameterCount=' + parameterCount);
switch (cmd) {
case 0x00: // INFO
status = cmdListAddr.inc(4).readByte();
debug('info unit=' + unit);
debug('info buffer=' + buffer);
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:
var blocks = disks[unit].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();
readBlock(state, unit, block, buffer);
break;
case 0x02: // WRITE BLOCK
block = cmdListAddr.inc(4).readWord();
writeBlock(state, unit, block, buffer);
break;
case 0x03: // FORMAT
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;
}
}
cpu.setState(state);
return ROM[off];
},
write: function() {
},
getState: function() {
},
setState: function() {
},
setBinary: function (drive, name, fmt, data) {
disks[drive] = [];
if (fmt == '2mg') {
data = data.slice(64);
}
for (var idx = 0; idx < data.byteLength; idx += 512) {
disks[drive].push(new Uint8Array(data.slice(idx, idx + 512)));
}
},
setDisk: function(drive, json) {
decodeDisk(drive, json);
}
};
}
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