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better details (nw)

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David Haywood 2014-08-30 16:14:04 +00:00
parent 28e6e7d574
commit d4a36c9971
1 changed files with 20 additions and 2 deletions
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src/mame/drivers/segas32.c
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@ -2516,8 +2516,26 @@ MACHINE_CONFIG_END
requires 2 linked system32 pcbs
requires additional math DSP to be emulated
The link PCB attaches 2 System 32 mainboards together, then ROM boards for each mainboard attaches to the link PCB.
Contains 2 GALs / PALs and one MB8421 & MB8431 Dual Port SRAMs chips.
The link PCB attaches 2 System 32 mainboards together, then ROM boards for each mainboard attaches to the link PCB.
This provides a direct connection between the PCBS (NOT a network link) so they effectively operate as a single boardset
sharing RAM (we should emulate it as such)
Link PCB is a single sparsely populated romless PCB but contains
Left side
1x MB8431-12LP (IC2)
2x HD74LS74AP (IC6, IC7)
2x GAL16V8A-25LP (stamped 315-5545) (IC3)
Right side
1x MB8431-12LP (IC1)
1x GAL16V8A-25LP (stamped xxx-xxxx) (IC5)
1x HD74LS74AP (IC8)
1x GAL16V8A-25LP (stamped 315-5545) (IC4)
(todo, full layout)
The left PCB (master?) contains a sub-board on the ROM board with the math DSP, the right PCB does not have this.
*/
ROM_START( arescue )