Altirra 2.0 Test 28 is released. Altirra is an Atari 8 bit Emulator on the Windows/DOS platform. Altirra emulates several models of the 8-bit Atari computers. This includes the the 800, 800XL, and 130XE versions. It has a lot of options, and compatibility is decent especially given the emulator's early stages. It also supports some copy protected games properly in emulation.
Altirra 2.0 Test 28 Changelog:
| LOL... good catch, that was a fun bug.
It happened when a POKEY timer was active for more than two billion cycles before the IRQ was activated. Two billion cycles is a lot. Problem is, the Atari executes about 1.8 million cycles per second, so that happens in under 20 minutes. At 1500% turbo that's less than two minutes. Ordinarily I'm pretty careful about writing code that handles timestamp wraparound, but I missed the case where a timer is running deferred for longer than that. Now the emulator checks if a timer is more than two seconds old and kicks it forward to avoid the problem. |
Download: Altirra 2.0 Test 28
Source: Here
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