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davidgiven / cpm65

CP/M for the 6502
BSD 2-Clause "Simplified" License
266 stars 23 forks source link

Saving files with BEDIT on the Atari doesn't work #91

Open davidgiven opened 8 months ago

davidgiven commented 8 months ago

It seems the Atari always returns carry set, indicating that there's a disk error. Most other programs don't check for this, but BEDIT does. This makes the mametest script fail.

ivop commented 8 months ago

I cannot reproduce this. What steps do you take? I did:

bedit 10 lda #0x12 save test.asm quit dir test.asm

No errors.

Tested with atari800 and Altirra 4.10 with stock Atari XL OS ROM.

davidgiven commented 8 months ago

I'm testing with MAME as part of the new emulator tests. Having done some poking I see that it fails differently on a800 than it does on a800xlp. Try this:

mame a800xlp -flop1 atari800.atr  -console -rompath roms/ -autoboot_script src/arch/atari800/mame-test.lua
mame a800 -flop1 atari800.atr  -console -rompath roms/ -autoboot_script src/arch/atari800/mame-test.lua

(Running sh scripts/get-roms.sh will download all the required ROMs)

ivop commented 8 months ago

Mame is notoriously bad for emulating the Atari 8-bit. Serial I/O is broken. Keyboard handling is broken. Both is done by Pokey and they have a half-baked Pokey emulation. Last time I checked (years ago) their pokey implementation was audio only, and even that was incomplete. Looks like not much has changed since. They intercept OS SIO calls but not mimic the OS correctly, like setting success flags. Similar problems with keyboard I/O. Try pressing backspace and see what I mean.

Retroarch has much better Atari 8-bit support, based on the atari800 emulator. It also has a VICE core, but I see Oric, BBC and Apple 2 are missing :/ There are several retroarch Mame cores though.