6502/8bitworkshop
1
0
Fork 0
mirror of https://github.com/sehugg/8bitworkshop.git synced 2024-06-08 08:33:32 +00:00
Code Issues Projects Releases Wiki Activity

apple2: allow mis-sized BIOS files

Browse Source
This commit is contained in:
Micah Cowan 2022-01-27 01:54:57 -08:00
parent 5970ae5bcc
commit 8e3f929098
1 changed files with 7 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
src/machine/apple2.ts
View File

@ -130,9 +130,13 @@ export class AppleII extends BasicScanlineMachine implements AcceptsBIOS {
this.kbdlatch = s.kbdlatch;
}
loadBIOS(data, title?) {
if (data.length != 0x3000) {
console.log(`apple2 loadBIOS !!!WARNING!!!: BIOS wants length 0x3000, but BIOS '${title}' has length 0x${data.length.toString(16)}`);
console.log("will load BIOS to end of memory anyway...");
}
this.bios = Uint8Array.from(data);
this.bios[0x39a] = 0x60; // $d39a = RTS
this.ram.set(this.bios, 0xd000);
this.bios[0xD39A - (0x10000 - this.bios.length)] = 0x60; // $d39a = RTS
this.ram.set(this.bios, 0x10000 - this.bios.length);
}
loadROM(data) {
if (data.length == 35*16*256) { // is it a disk image?
@ -167,7 +171,7 @@ export class AppleII extends BasicScanlineMachine implements AcceptsBIOS {
return this.ram[address];
} else if (address >= 0xd000) {
if (!this.auxRAMselected)
return this.bios[address - 0xd000];
return this.bios[address - (0x10000 - this.bios.length)];
else if (address >= 0xe000)
return this.ram[address];
else