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srmp2.cpp: X0-005 is probably an undumped MCU (nw)

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AJR 2017-11-05 13:10:00 -05:00
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src/mame/drivers/srmp2.cpp
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@ -30,17 +30,19 @@ System specs :
CPU : 68000 (8MHz)
Sound : AY8910 + MSM5205
Chips : X1-001, X1-002A, X1-003, X1-004x2, X0-005 x2
X1-001, X1-002A : Sprites
X1-003 : Video output
X1-004 : ???
X1-005 : ???
X1-001, X1-002A (64 pins) : Sprites
X1-003 (?? pins) : Video output
X1-004 (52 pins) : Inputs
X0-005 (40 pins) : Interface
Known issues :
===============
- IOX might be either a shared component between PCBs or every game have its own configuration.
For now I've opted for the latter solution, until an HW test will be done ...
Could also be that's a MCU of some sort.
- X0-005 is a probable MCU, most likely a 8741/8742 UPI type like the "M-Chip" in tnzs.cpp.
One X0-005 handles the inputs; the other drives the MSM5205 with the aid of a 8243 expander.
Are both of these functions really performed by the same (undumped) internal program?
- AY-3-8910 sound may be wrong.
- CPU clock of srmp3 does not match the real machine.
- MSM5205 clock frequency in srmp3 is wrong.