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_rm_
02-28-2015, 06:37 PM
I'm trying to read a Konami GFX rom from a Crime Fighters PCB, the reference is 821K05.

Since the file is 512KB, should i read it as a 27C4002?

Xian Xi
02-28-2015, 07:54 PM
yes or 4096. Just multiply the file size by 8 and it will tell you which chip to use.

512 x 8 = 4096 aka 4mbit eprom

bustedstr8
02-28-2015, 10:31 PM
Pretty sure TMNT type hardware used 4M mask pinout - 27C400.

_rm_
03-01-2015, 03:43 AM
Thanks guys. I just wanted to double check because the rom gives me an instant error no matter what option i choose, guess i found the problem with this game ;)

Xian Xi
03-02-2015, 04:02 AM
Pretty sure TMNT type hardware used 4M mask pinout - 27C400.

Oh ya, yes they do. I think I used MX4001s on mine, worked like a charm.

mainman
03-02-2015, 11:27 AM
Oh ya, yes they do. I think I used MX4001s on mine, worked like a charm.

MX4100

Xian Xi
03-03-2015, 02:23 PM
MX4100

LOL, damn my daughter's 1st bday party is on Sunday and the prep is frying my brain.

_rm_
03-03-2015, 03:10 PM
I savaged some 27C4100 and Toshiba TC574200D from Puzzle Bobble boots, but for some strange reason i can't erase them. I left them in the UV eraser for very long yesterday and today i took them with me to work to try on another UV eraser but with the same result. Each time i perform a blank check it always fails the test.

I find strange that all 4 eproms from two different games are all dead.

Anyway, i already bought new ones from evilbay, let's see if that resolves the problem.