> Triforce type1/2 media board just contain ALTERA FPGA, 2Mb flash chip (IPL?) and > connected to (regular?) Sega DIMM board. so at first must be emulated DIMM with SH4 > and then RE how ALTERA emulate Drive Interface commands and scrambles it. All this > looks too complicated.
"looks too complicated, let's do that" is the unofficial MAME motto. I realize Demul has different goals (fame, women, money) than we do though ;-)
> I've extracted firmware.asic file and decrypted it - it looks like code for some CPU, > but I cant identify for what CPU-type it is ( > if anyone can/want help with this - PM me.
Didn't tmbinc identify the CPU as an NEC V850? I would guess that's probably a similar instruction set to the V810 used in Virtual Boy and PC-FX.