mirror of
https://github.com/sehugg/8bitworkshop.git
synced 2024-12-09 19:49:18 +00:00
apple2: can read from boot prom
This commit is contained in:
parent
a815b18d7d
commit
0131ed15f3
@ -436,3 +436,51 @@ https://bellard.org/tcc/
|
||||
https://wiki.osdev.org/Smaller_C
|
||||
https://yasm.tortall.net/
|
||||
https://wiki.osdev.org/Tool_Comparison
|
||||
|
||||
|
||||
COMPONENT EMULATION
|
||||
|
||||
Emulate discrete chips
|
||||
- verilog
|
||||
- js
|
||||
- wasm? (overhead?)
|
||||
Block diagram level
|
||||
Buses
|
||||
Insn/cycle timing
|
||||
Pos/neg clock edge
|
||||
Timers
|
||||
Polling vs. callbacks (https://github.com/floooh/chips)
|
||||
- callbacks might only affect devices internally, until next cycle
|
||||
CRT simulator
|
||||
Move leaf nodes to workers (sound chips)
|
||||
CPU opcode-step switch: https://floooh.github.io/2019/12/13/cycle-stepped-6502.html
|
||||
- macros are cool!
|
||||
Inspect bus edges and internal state
|
||||
|
||||
type Bits<N> = number;
|
||||
interface Clocked { }
|
||||
interface BusListener<N> {
|
||||
recv(value : Bits<N>) : void;
|
||||
}
|
||||
class Bus<N> {
|
||||
listeners : BusListener<N>;
|
||||
send(value : Bits<N>) : void {
|
||||
}
|
||||
}
|
||||
function bus(bits : number) {
|
||||
return function(
|
||||
target: any,
|
||||
propertyKey: string,
|
||||
descriptor: PropertyDescriptor
|
||||
) {
|
||||
//descriptor.configurable = value;
|
||||
};
|
||||
}
|
||||
class M6502_T {
|
||||
IR : Bits<16>; /* internal instruction register */
|
||||
addr : Bus<16>;
|
||||
data : Bus<8>;
|
||||
|
||||
@bus(16) address : Bus<16>;
|
||||
}
|
||||
|
||||
|
11
scripts/dist.sh
Executable file
11
scripts/dist.sh
Executable file
@ -0,0 +1,11 @@
|
||||
# https://github.com/Kentzo/git-archive-all
|
||||
# build archives
|
||||
export VERSION=`git tag | tail -1`
|
||||
export OUTDIR=dist
|
||||
echo Creating $OUTDIR
|
||||
git-archive-all --prefix . release/$OUTDIR.zip
|
||||
zip -9r release/$OUTDIR.zip gen
|
||||
mkdir $OUTDIR
|
||||
cd $OUTDIR
|
||||
unzip ../release/$OUTDIR.zip
|
||||
|
@ -2,5 +2,5 @@
|
||||
|
||||
. ./scripts/env.sh
|
||||
DESTPATH=$RSYNC_PATH/dev/
|
||||
git ls-files -z | rsync --stats --exclude '.*' --exclude 'scripts/*' --exclude=node_modules -ril --chmod=a+rx -e "ssh" --files-from - -0 . $DESTPATH
|
||||
rsync --stats -rpilvz --chmod=a+rx -e "ssh" ./gen config.js $DESTPATH/
|
||||
git ls-files -z | rsync --stats -riltz --exclude '.*' --exclude 'scripts/*' --exclude=node_modules --chmod=a+rx -e "ssh" --files-from - -0 . $DESTPATH
|
||||
rsync --stats -riltz --chmod=a+rx -e "ssh" ./gen config.js $DESTPATH/
|
||||
|
@ -28,7 +28,7 @@ interface AppleIIControlsState {
|
||||
interface AppleIIState extends AppleIIStateBase, AppleIIControlsState {
|
||||
c : MOS6502State;
|
||||
grswitch : number;
|
||||
slots: any[];
|
||||
slots: SlotDevice[];
|
||||
}
|
||||
|
||||
interface SlotDevice extends Bus {
|
||||
@ -147,30 +147,40 @@ export class AppleII extends BasicScanlineMachine {
|
||||
this.auxRAMselected = false;
|
||||
this.auxRAMbank = 1;
|
||||
this.writeinhibit = true;
|
||||
this.skipboot();
|
||||
}
|
||||
skipboot() {
|
||||
// execute until $c600 boot
|
||||
for (var i=0; i<2000000; i++) {
|
||||
this.cpu.advanceClock();
|
||||
if (this.cpu.getPC() == 0xc602) {
|
||||
break;
|
||||
}
|
||||
if ((this.cpu.getPC()>>8) == 0xc6) break;
|
||||
}
|
||||
// get out of $c600 boot
|
||||
for (var i=0; i<2000000; i++) {
|
||||
this.cpu.advanceClock();
|
||||
if ((this.cpu.getPC()>>8) < 0xc6) break;
|
||||
}
|
||||
}
|
||||
noise() : number {
|
||||
return (this.rnd = xorshift32(this.rnd)) & 0xff;
|
||||
}
|
||||
readConst(address:number) : number {
|
||||
if (address < 0xc000) {
|
||||
return this.ram[address];
|
||||
} else if (address >= 0xd000) {
|
||||
if (!this.auxRAMselected)
|
||||
return this.bios[address - 0xd000];
|
||||
else if (address >= 0xe000)
|
||||
return this.ram[address];
|
||||
else
|
||||
return this.ram[address + this.bank2rdoffset];
|
||||
} else
|
||||
return 0;
|
||||
}
|
||||
readConst(address: number): number {
|
||||
if (address < 0xc000) {
|
||||
return this.ram[address];
|
||||
} else if (address >= 0xd000) {
|
||||
if (!this.auxRAMselected)
|
||||
return this.bios[address - 0xd000];
|
||||
else if (address >= 0xe000)
|
||||
return this.ram[address];
|
||||
else
|
||||
return this.ram[address + this.bank2rdoffset];
|
||||
} else if (address >= 0xc100 && address < 0xc800) {
|
||||
var slot = (address >> 8) & 7;
|
||||
return (this.slots[slot] && this.slots[slot].readROM(address & 0xff)) | 0;
|
||||
} else {
|
||||
return 0;
|
||||
}
|
||||
}
|
||||
read(address:number) : number {
|
||||
address &= 0xffff;
|
||||
if (address < 0xc000 || address >= 0xd000) {
|
||||
@ -221,8 +231,7 @@ export class AppleII extends BasicScanlineMachine {
|
||||
return (this.slots[slot-8] && this.slots[slot-8].read(address & 0xf)) | 0;
|
||||
}
|
||||
} else if (address >= 0xc100 && address < 0xc800) {
|
||||
var slot = (address >> 8) & 7;
|
||||
return (this.slots[slot] && this.slots[slot].readROM(address & 0xff)) | 0;
|
||||
return this.readConst(address);
|
||||
}
|
||||
return this.noise();
|
||||
}
|
||||
|
Loading…
Reference in New Issue
Block a user