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apple2: implement loadBIOS / apple2.rom

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This commit is contained in:
Micah Cowan 2022-01-27 00:22:59 -08:00
parent b3d42f944b
commit 5970ae5bcc
1 changed files with 8 additions and 5 deletions
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13
src/machine/apple2.ts
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@ -1,6 +1,6 @@
import { MOS6502, MOS6502State } from "../common/cpu/MOS6502"; import { MOS6502, MOS6502State } from "../common/cpu/MOS6502";
import { Bus, BasicScanlineMachine, SavesState } from "../common/devices"; import { Bus, BasicScanlineMachine, SavesState, AcceptsBIOS } from "../common/devices";
import { KeyFlags } from "../common/emu"; // TODO import { KeyFlags } from "../common/emu"; // TODO
import { hex, lzgmini, stringToByteArray, RGBA, printFlags } from "../common/util"; import { hex, lzgmini, stringToByteArray, RGBA, printFlags } from "../common/util";
@ -33,7 +33,7 @@ interface SlotDevice extends Bus {
readConst(address: number) : number; readConst(address: number) : number;
} }
export class AppleII extends BasicScanlineMachine { export class AppleII extends BasicScanlineMachine implements AcceptsBIOS {
// approx: http://www.cs.columbia.edu/~sedwards/apple2fpga/ // approx: http://www.cs.columbia.edu/~sedwards/apple2fpga/
cpuFrequency = 1022727; cpuFrequency = 1022727;
@ -88,9 +88,7 @@ export class AppleII extends BasicScanlineMachine {
constructor() { constructor() {
super(); super();
this.bios = new lzgmini().decode(stringToByteArray(atob(APPLEIIGO_LZG))); this.loadBIOS(new lzgmini().decode(stringToByteArray(atob(APPLEIIGO_LZG))));
this.bios[0x39a] = 0x60; // $d39a = RTS
this.ram.set(this.bios, 0xd000);
this.ram[0xbf00] = 0x4c; // fake DOS detect for C this.ram[0xbf00] = 0x4c; // fake DOS detect for C
this.ram[0xbf6f] = 0x01; // fake DOS detect for C this.ram[0xbf6f] = 0x01; // fake DOS detect for C
this.connectCPUMemoryBus(this); this.connectCPUMemoryBus(this);
@ -131,6 +129,11 @@ export class AppleII extends BasicScanlineMachine {
loadControlsState(s:AppleIIControlsState) { loadControlsState(s:AppleIIControlsState) {
this.kbdlatch = s.kbdlatch; this.kbdlatch = s.kbdlatch;
} }
loadBIOS(data, title?) {
this.bios = Uint8Array.from(data);
this.bios[0x39a] = 0x60; // $d39a = RTS
this.ram.set(this.bios, 0xd000);
}
loadROM(data) { loadROM(data) {
if (data.length == 35*16*256) { // is it a disk image? if (data.length == 35*16*256) { // is it a disk image?
var diskii = new DiskII(this, data); var diskii = new DiskII(this, data);