Re: Testing Cinematronics CPU's

There already is a document with all the signatures for the game boards,
both the Rockola version and the vectorbeam carry the sigs for their
games. What you need is the signature generator gizmo, currently in
development (I beleive)...someone here will pop up with the info. I
forget who right now, and it is late...

John :-#)#

Matt Rossiter - Verio Southern California wrote:
>
> As I mentioned before - I've been wanting to document an "easy to use"
> procedure for fixing most of the Cinematronics vector game CPUs (unless
> someone already has done this and I don't know about it).
>
> Aside from basic troubleshooting tips that the Cinematronics manuals cover
> - I thought that documenting signatures and logic probe data on each chip
> without using the exorsizor would be helpfull.
>
> So - the first thing I wanted to do was create a ROM image filled with
> nops to make the signatures readable.
>
> Would I be able to take a standard 2716 ROM and do a Bank Fill between the
> addresses 000h and FFFh with an Opcode of 0x5f "nop" and let the board sit
> there and do nothing? Some of these ideas came into my head after
> reading Zonn and Chris Moore's assembler docs. If it sounds like I don't
> know what I'm talking about, just keep in mind that I was a music major in
> college - not an electronics engineer :) - But if I'm close, suggestions
> are certainly welcome.
>
> Someone also suggested earlier that I could hardwire the nops into the
> board. I'd like to know how this is done. I'm assuming I could tie
> certain pins to ground - thus loading all zeros through the data lines?
>
> Anyway - I just thought one or two of you guys might give some advice.
>
> Thanks...
>
> Matt

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