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iTRDC2

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Hello all,

I got some time ago a Sunset Riders KONAMI original board.
Despite it boots OK I noticed that the image is not 100% OK. Then I went to the test menu and ran the RAM/ ROM tests and I got the info that one IC (MASK ROM 3L is BAD).

On top of the MASK ROM 3L is written 064B07 054614 9138D and on the PCB is written MS8M16. The IC is a DIP42 package.
Does any one know what it is the equivalent EPROM than I can use to replace this bad MASK ROM? Will a M27C800 do the job?

Thanks in advance,
iTRDC2
 
Yes, a M27C800 should work fine as a replacement for that mask ROM. Before you remove the mask ROM, check continuity on the traces to it and make sure there isn't a break in one of the circuits.
 
If you have a 27C160 on hand, since they happen to be more common, you could just double up the ROM and use one of those.
Excellent idea.

Assuming Windows:
If you open command prompt then you navigate to the folder that your files are in. Then:

copy /b filename.bin + filename.bin = doubledfilename.bin

And program doubledfilename.bin to the rom.
 
If you have a 27C160 on hand, since they happen to be more common, you could just double up the ROM and use one of those.
Indeed I have one 27C160 from a Naomi bios that can do the job.

Thank you for the tip :thumbup:
 
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