5
5
The Seibu sound system comprises of a Z80A, a YM3812, a YM3931*, and
6
6
an Oki MSM6295. As well as sound the Z80 can controls coins and pass
7
7
data to the main cpu. There are a few little quirks that make it
10
10
* The YM3812 generates interrupt RST10, by asserting the interrupt line,
11
11
and placing 0xd7 on the data bus.