byuu says:
Changelog:
- processor/lr35902: completed rewrite
I'd appreciate regression testing of the Game Boy and Game Boy Color
emulation between v103r24 and v103r26 (skip r25) if anyone wouldn't
mind.
I fixed up processor/lr35902-legacy to compile and run, so that trace
logs can be created between the two cores to find errors. I'm going to
kill processor/lr35902-legacy with the next WIP release, as well as make
changes to the trace format (add flags externally from AF; much easier
to read them that way), which will make it more difficult to do these
comparisons in the future, hence r26 may prove important later on if we
miss regressions this time.
As for the speed of the new CPU core, not too much to report ... at
least it's not slower :)
Mega Man II: 212.5 to 214.5fps
Shiro no Sho: 191.5 to 191.5fps
Oracle of Ages: 182.5 to 190.5fps
byuu says:
Changelog:
- gb/cpu: force STAT mode to 0 when LCD is disabled (fixes Pokemon
Pinball, etc)
- gb/ppu: when LCD is disabled, require at least one-frame wait to
re-enable, display white during this time
- todo: should step by a scanline at a time: worst-case is an
extra 99% of a frame to enable again
- gba/ppu: cache tilemap lookups and attribute parsing
- it's more accurate because the GBA wouldn't read this for every
pixel
- but unfortunately, this didn't provide any speedup at all ...
sigh
- ruby/audio/alsa: fixed const issue with free()
- ruby/video/cgl: removed `glDisable(GL_ALPHA_TEST)` [deprecated]
- ruby/video/cgl: removed `glEnable(GL_TEXTURE_2D)` [unnecessary as
we use shaders]
- processor/lr35902: started rewrite¹
¹: so, the Game Boy and Game Boy Color cores will be completely
broken for at least the next two or three WIPs.
The old LR35902 was complete garbage, written in early 2011. So I'm
rewriting it to provide a massive cleanup and consistency with other
processor cores, especially the Z80 core.
I've got about 85% of the main instructions implemented, and then I have
to do the CB instructions. The CB instructions are easier because
they're mostly just a small number of opcodes in many small variations,
but it'll still be tedious.
Tim Allen