Altirra 2.0 Test 28 - 模擬器

http://virtualdub.org/altirra.html

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.

http://www.virtualdub.org/beta/Altirra-2.00-test28.zip

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