Apple-2-Tools
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apple2js
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Goose slot detection code

This commit is contained in:
Will Scullin 2021-03-08 19:28:52 -08:00
parent b9bd03b958
commit 63e49696b8
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GPG Key ID: 26DCD1042C6638CD
3 changed files with 12 additions and 2 deletions
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4
js/apple2io.ts
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@ -11,7 +11,7 @@
import CPU6502 from './cpu6502';
import { Card, Memory, MemoryPages, TapeData, byte, Restorable } from './types';
import { debug } from './util';
import { debug, garbage } from './util';
type slot = 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7;
type button = 0 | 1 | 2;
@ -364,6 +364,8 @@ export default class Apple2IO implements MemoryPages, Restorable<Apple2IOState>
}
if (card) {
result = card.read(page, off);
} else {
result = garbage();
}
break;
default:

8
js/mmu.ts
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@ -392,17 +392,25 @@ export default class MMU implements Memory, Restorable<MMUState> {
if (this._intcxrom) {
for (let idx = 0xc1; idx < 0xd0; idx++) {
this._readPages[idx] = this._pages[idx][1];
this._writePages[idx] = this._pages[idx][1];
}
if (this._slot3rom) {
this._readPages[0xc3] = this._pages[0xc3][0];
this._writePages[0xc3] = this._pages[0xc3][0];
}
} else {
for (let idx = 0xc1; idx < 0xd0; idx++) {
this._readPages[idx] = this._pages[idx][0];
this._writePages[idx] = this._pages[idx][0];
}
if (!this._slot3rom) {
this._readPages[0xc3] = this._pages[0xc3][1];
this._writePages[0xc3] = this._pages[0xc3][1];
}
if (this._intc8rom) {
for (let idx = 0xc8; idx < 0xd0; idx++) {
this._readPages[idx] = this._pages[idx][1];
this._writePages[idx] = this._pages[idx][1];
}
}
}

2
js/util.ts
View File

@ -17,7 +17,7 @@ const hex_digits = '0123456789ABCDEF';
const bin_digits = '01';
/** Returns a random byte. */
function garbage(): byte {
export function garbage(): byte {
return (Math.random() * 0x100) & 0xff;
}