swap eprom chips?

[mike357]

I have several games that no longer work, one is pac-man just as an experiment I swapped the eprom with another pacman and it worked, no big deal there. I'm wondering if a rom can be downloaded for repairs on other games. I think it would be legal as long as you are putting the frogger program in a frogger game cartridge. I can get access to an eprom burner and extra eproms (from duplicate games). Has anybody tried this, will it work? Any help would be appreciated, thanks.

[Junie]

Original Atari games used ROM chips, EPROM's are different. If you want to program EPROM's you will need to use a Hex Inverter on the PCB as well.

 

If you are interested in programming the original ROM chips you will need to find a old programmer. The chips are not available, and the old ROM chips are OTP (One time programable).

 

Perhaps others will join in and fill-in any other details.

[Mot]

Does anyone know of a site with FAQ on EPROM burners? Are these things big bucks like in $1,000 range or what range are they. Can one make it out of parts? How hard are the EPROM's to find.

 

Ok I think that is it for now.

[Junie]

quote:

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Originally posted by Mot:

Does anyone know of a site with FAQ on EPROM burners? Are these things big bucks like in $1,000 range or what range are they. Can one make it out of parts? How hard are the EPROM's to find.

 

Ok I think that is it for now.

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You can buy the EPROM programmers for about $150 - $200 on average, they can go up to several thousand for multiple chips at a time.

 

EPROM's can be purchased from many different places, usually they cost $5 - $6 a piece new. Or you can get them from eBay usually for about $1 - $2 a piece. If you get them from eBay they need to be erased first, you need a EPROM UV eraser costs about $50.

 

Sorry I don't have any links available currently, if you need them let me know and I'll post them.

[Mot]

Hey Junie thanks for the post. Now at least I know the cost of the thing.

 

I just wonder if I see (or saw) one at the thrift, if I knew what one looks like.

(Well I did see something at the thrift that had that green chip socket thing on it but it said something about logic probe and was something around $60, so I passed on it not knowing enough about it .)