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Author Topic: S+ with error 68 (bad data prom)  (Read 755 times)

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Offline rjpohl

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S+ with error 68 (bad data prom)
« on: March 20, 2023, 03:08:14 PM »
I have a SS4949 (quartermania) type 5 game.  I've burnt several chips (27c64a) and keep getting the 68 error code.  I've tried using a SP1271 and SP709.  I know the SP chips and cpu are good/working.
thanks
Bob
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Online Stayouttadabunker

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Re: S+ with error 68 (bad data prom)
« Reply #1 on: March 20, 2023, 04:51:31 PM »
Wait...isn't that the code where you have to turn OFF the power , then flip it back ON?

Oh and sometimes you gotta move that jumper next to the chip socket for smaller chips?
I don't remember offhand because I usually burn to 512k sized chips.

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Offline Tilt

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Re: S+ with error 68 (bad data prom)
« Reply #2 on: March 20, 2023, 05:29:35 PM »
Possibly a bad file too?
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Offline rjpohl

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Re: S+ with error 68 (bad data prom)
« Reply #3 on: March 20, 2023, 06:10:09 PM »
I actually had made 6 different chips for a guy, 3 of the 6 were good.  the 4949, 4950 and 4960 were bad.  I guess it's possible I have a few bad files.  Can anyone legt me know checksum for 4949, 4950 and 4960?
Bob
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Re: S+ with error 68 (bad data prom)
« Reply #4 on: March 20, 2023, 07:08:27 PM »
The only one I have is SS4960 with a checksum of BA00
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Re: S+ with error 68 (bad data prom)
« Reply #5 on: March 20, 2023, 07:43:32 PM »
It seems you're attempting to run WAP games without the required hardware and software. The hardware is above my knowledge level but it obviously isn't going to work with your run of the mill SP chips. Read some of the WAP PSRs. See sample pic. There are others.
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