From d4a36c9971143fe48752664f42dde2cdde5611de Mon Sep 17 00:00:00 2001 From: David Haywood Date: Sat, 30 Aug 2014 16:14:04 +0000 Subject: [PATCH] better details (nw) --- src/mame/drivers/segas32.c | 22 ++++++++++++++++++++-- 1 file changed, 20 insertions(+), 2 deletions(-) diff --git a/src/mame/drivers/segas32.c b/src/mame/drivers/segas32.c index d23815ad20a..e7c0b97bf34 100644 --- a/src/mame/drivers/segas32.c +++ b/src/mame/drivers/segas32.c @@ -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 )