Recent content by MetalliC

it smells like VDP1 has been died, or something wrong with its connection to SCU chip, so, all the 3 RAM chips connected through it doesn't pass RAM test. not sure which exactly chip it is on ST-V, it might be 315-5689 or 315-5883

out of curiosity, what is the differences with regular BIOS, only region code byte or more?

CPS3 store settings and unlocks in 93C46 EEPROM, perhaps it's just previous PCB owner already entered Akuma unlock code? :unsure:

are you sure it's true for SFIII 2nd? which by design use not encrypted game program SIMMs = no need to modify them = checksum should be OK

false what exactly? yes, I'm aware of CF vendor check is in firmware.asic

you've been already told - firmware programmed inside of ASIC (NEC V850 CPU with flash), and there is no known ways to manually reprogram it. for sure there should be the way to (re)program it, for case when new PCB was manufactured at factory and ASIC have no any firmware yet. but, it's...

@telmnstr media board firmware is inside of large Sega ASIC, there is no known to me way somehow manually reprogram it. TSOP flash ROM iirc is segaboot. that's the code which shows you test mode screens, and it's fine if you see them.

I see, missed this one. it looks like both codes works. there is no clear confirmation, simply hold the buttons until capcom logo. I'm wondering why you cant check this by yourself running this game on Naomi or in some emulator...

@Swirl confirm what? there is no known unlock codes or secrets for arcade Giga Wing 2

TLDR: AR protocol differs from BR with one status byte, in BR it's binary value while in AR it's ASCII digit iirc someone already did 1231AR simulator for some other game, but I can't remember which one it was

3.17 firmware doesn't supports CF cards, this feature was added in 4.01 update yes, you should netboot "4.02" firmware update (hack of 4.01 with removed CF card vendor check/protection).

I think it should work, I'd guess idc didn't cooked proper 256-byte XXX.BIN file, with same XXX as text in PIC key, and checksum of decrypted game binary

so called "4.02" hack is official 4.01 firmware with removed CF card vendor check and protection, just a few byte patch. it change nothing in other parts, including GD-ROM boot.

np, welcome it is common issue with many other arcade platforms/games as well, so even if sound chip(s) emulation (nearly) perfect it sounds quite different compared to real thing. modern MAME attempts to simulate that, but for quite small number of games, where is mostly simple RC-filters. as...

there is no issues with YMZ770 emulation, but missing analogue part simulation (amplifier with low pass filter), which hides how awful sound quality in CV1K games. simply configure low pass in your sound card driver (or install some 3rd party tool) and you'll get about same result as real PCB.