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notes (nw)

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Vas Crabb 2015-12-29 15:53:42 +11:00
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10
src/mame/drivers/laserbat.cpp
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@ -9,9 +9,13 @@
The two games have identical game/video boards hardware, but
completely different sound boards. Laser Battle/Lazarian have a
dumb sound board with TMS organ and CSG chips driven directly by the
game program. Cat'N'Mouse
very different and they don't use the collision detection provided
by the s2636 chips.
game program. Cat and Mouse uses an intelligent sound board with
its own CPU that plays melodies on a pair of AY-3-8910 PSGs.
The video hardware uses a PLA to mix TTL-generated background,
effect and sprite layers with the S2636 PVI outputs. The collision
detection and interrupt generation capabilities of the S2636 PVIs
are not used.
Game board supports two different sound board interfaces: 16-bit
unidirectional bus on J3 and 8-bit bidirectional bus on J7.