Build Your Own Arcade Controls Forum

Arcade Collecting => Restorations & repair => Topic started by: 8way on October 18, 2014, 09:31:40 am

Title: Primal Rage Bad ROM replacement?
Post by: 8way on October 18, 2014, 09:31:40 am
Ok, I got a Primal Rage PCB and everything works, except some of the character sprites are missing. So I ran a diagnostics in the test menu and it showing a bad ROM at MOH0.0. This is a 32pin chip and it has a part # 136102-0317. Anybody know were I can get this or if it possible to replace it with a EPROM?
Title: Re: Primal Rage Bad ROM replacement?
Post by: PL1 on October 18, 2014, 12:21:30 pm
You may want to check http://hobbyroms.com/ (http://hobbyroms.com/) -- many good reviews by KLOVers IIRC.


Scott
Title: Re: Primal Rage Bad ROM replacement?
Post by: 8way on October 18, 2014, 09:00:14 pm
Quote from: PL1 on October 18, 2014, 12:21:30 pm
You may want to check http://hobbyroms.com/ (http://hobbyroms.com/) -- many good reviews by KLOVers IIRC.


Scott

Thanks for the info, but the chip is not a standard EPROM. I have the ability to flash my own EPROM's that's not a problem. I just need to know if this chip can be replaced with a EPROM. I can't seem to find any info on it, except that its 1MB 32pin PROM chip.

MX T9430
ATARI GMS 94
136102-0317
21131A

Tha's all the info written on the chip. Any ideas?
Title: Re: Primal Rage Bad ROM replacement?
Post by: Malenko on October 18, 2014, 09:33:50 pm
Quote from: 8way on October 18, 2014, 09:00:14 pm
Tha's all the info written on the chip. Any ideas?

message steph at hobbyroms, he'd prolly know.
Title: Re: Primal Rage Bad ROM replacement?
Post by: 8way on October 20, 2014, 10:45:39 am
Quote from: Malenko on October 18, 2014, 09:33:50 pm
Quote from: 8way on October 18, 2014, 09:00:14 pm
Tha's all the info written on the chip. Any ideas?

message steph at hobbyroms, he'd prolly know.

OK, so I  messaged him and im waiting on a reply. Meanwhile i found a spare 27C010 and programed it with the correct rom. Unfortunately it did not work. It actually made it worse, visually could not see a difference, but when running a diagnostics it now shows multiple bad roms. This is the same behavior if you do not put in a rom at all at MOH0.0 location. So it looks like the pinouts are definitely different. So im really hopping someone can shed some light on this problem.
Title: Re: Primal Rage Bad ROM replacement?
Post by: 8way on October 21, 2014, 07:36:33 am
Made some progress thanks to Steph, turns out a made an error with the whole bit-to-byte as he was nice enough to point out. So I ordered some 27C801 witch should work nicely. I'll report back when it arrives.
Title: Re: Primal Rage Bad ROM replacement?
Post by: Malenko on October 21, 2014, 08:38:13 am
Steph is awesome.  Glad you're headed in the right direction  :applaud:
Title: Re: Primal Rage Bad ROM replacement?
Post by: 8way on October 24, 2014, 08:49:50 pm
Made a strange discovery today, not sure what to think of this. So I ran Primal Rage in MAME and did a diagnostics and WTF it shows the same error on ROM MOH0.0. How can this be ??? Can someone with a working board confirm they get a green pass on all the ROMS in the video section of the diagnostics? So now I'm pretty confident that its not a bad ROM, just don't know what it could be. Any ideas?