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This commit is contained in:
Angelo Salese 2015-10-15 18:36:51 +02:00
parent d9ad061e2a
commit 3ccb79bbbb
1 changed files with 7 additions and 5 deletions
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src/mame/drivers/cntsteer.c
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@ -16,11 +16,13 @@
- according to a side-by-side test, sound should be "darker" by some octaves, - according to a side-by-side test, sound should be "darker" by some octaves,
likely that a sound filter is needed; likely that a sound filter is needed;
cntsteer specific: cntsteer specific:
- proper bus request support, starting from understanding the role of DP register in M6809 core - In Back Rotate Test, rotation is tested with the following arrangement (upper bits of rotation parameter):
(having that returning non-zero in NMI for subcpu forces a reset?); 04 -> 05 -> 02 -> 03 -> 00 -> 01 -> 06 -> 07 -> 04 and backwards
- Understand how irq communication works between CPUs. Buffer $415-6 seems involved in the protocol. Anything with bit 0 set is tested from 0xff to 0, with bit 0 clear that's 0 -> 0xff, fun.
- understand who's master and who's slave between "back" and "mix" CPUs (order might be actually inverted); - Understand how irq communication works between CPUs. Buffer $415-6 seems involved in the protocol.
- understand why background mirroring causes wrong gfxs on title screen (wrong tilemap paging); We currently have slave CPU irq hooked up to vblank, might or might not be correct.
- invert order between maincpu and subcpu, subcpu is clearly the master CPU here.
- understand why background mirroring causes wrong gfxs on title screen (wrong tilemap paging, missing video bit or it's actually a RMW thing);
cleanup cleanup
- split into driver/video; - split into driver/video;