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Title: CEI 903 Diagnostic prom? Post by: SolidSilver on February 22, 2014, 08:51:29 PM Been collecting CEI 903/904 gaming software, anything I can get that is different from the usual v23.9 with 94% RTP,
just to make sense of it all. If/when I acquire enough varieties, I will publish the list on NLG. Have been offered a "903 Diagnostic" prom. Any idea what it does, how it's used, and if I need additional proms or hardware to use it? Title: Re: CEI 903 Diagnostic prom? Post by: dormi on March 01, 2014, 07:52:33 PM 903 diagnostic PROM is for testing the 903-904 logic board. Diagnostic PROM is inserted into U9 socket, CGO U67 needs to be in place. The rest of the PROMS can be in place or not. It is a very handy tool for board repair. There is another test PROM for 905 boards. Anyone know if there is one for 906 boards?
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