Nowe poprawki w Altirra - emulatorze ośmiobitowych maszynek ATARI. Bug zgłoszony przez Breakera (problemy z jakością dźwięku) został poprawiony. Phaeron na zapas rozwiązał też problemy jakie jego emulator miał z działaniem pod Windows 8 (nomen omen, gdyby ktoś chciał looknąć to tutaj można ściągnąć oficjalnie dev-preview Win8).
![[ATARI] Altirra 2.0 test XXXIX](www/picphoto/19a443df1.jpg)
Altirra 2.0.0 test 39 - 23 09 2011
Author' comment:
Oops... regression in 16-bit timer handling. This version also allows finer grained speed adjustments by 1%. I forgot to add this to the change log. I also have some fixes pending for display issues with the Windows 8 Developer Preview, but I doubt anyone's hitting those at the moment.
Altirra 2.0.0 test XXXVII 13 09 2011
Author' comment:
OSS 8K and ROM path shuffling should be fixed. The OSS 8K mode is the same as the OSS M091 mode except that an 8K ROM is used instead of a 16K ROM. One difference between it and regular 8K is that the OSS 8K cart can be disabled whereas the standard 8K can't.
I hooked up the BASIC cart to the BASIC option for pre-800XL machines because it's such a commonly needed cartridge. I should change it to a different option now that the option's been renamed, but I'm not going to do it until after post 2.0.
Altirra 2.0.0 test XXXVII 12 09 2011
breaking changes
- Debugger: The step over command has been changed from s to o.
Features added:
- Debugger: Added fill (f) and search (s) commands.
- Debugger: Register (r) command can now set individual flags.
- Cartridge: Added support for OSS 8K, Blizzard 4K, AST 32K, Atrax SDX 64K, Turbosoft 64K, and Turbosoft 128K types.
Bugs Fixed:
- Debugger: Register (r) can no longer clear bits 4 and 5 of P when unsupported by current CPU mode.
Author' comment:
I missed the comment about the ROM image issue -- it's a bug in the code that saves it. I messed up the array order. I'll fix it on the next revision.
AFAIK there is no standard name for the XEGS kernel ROM image. What you should have for it is a 16K image; the BASIC and Missile Command (game) ROM images should be separate. I've heard rumors that the XL/XE and XEGS operating systems are actually the same and it's just that the XEGS support was added in a later revision.
wstecz23/09/2011 09:37
I was struck by both nostalgia and ambition and started to write a new 8-bit Atari emulator from scratch. This is the result.
At this point, I've learned a lot more about the Atari and Altirra now emulates more than I ever had or did years ago, but I still work on it periodically. It also serves as a modularity test for the VirtualDub code base, from which Altirra shares some components. If you are struck by nostalgia too or have a desire to do some Atari development, perhaps it might be useful to you, too.