Re: RamKeeper in a Rom03 with TranswarpGS?

["Tim Haynes" <timhaynes@no.spam.please.alumni.uwaterloo.ca>]

"Wayne Stewart" <waynes@telus.dotnet> wrote in message
news:SVzWc.49294$X12.11343@edtnps84...
> Christopher G. Mason wrote:
>
> > I thought those scans looked familiar. I recall making them about 5
> > years ago and posted them to the Delphi A2 forum. Anyway my Ramkeeper
> > came with the modified chip and works fine in a ROM 3. My board has
> > RK1A.N, RK2A.N, and RK3A.N GALs. The ROM revision is RK1.6, and the PCB
> > is Revision C. This was likely one of the last batches of RamKeepers
> > produced as the included gel cell is dated "1Q 1990". Hopefully the
> > above info helps.
>
> I think we discussed it a bit at the time. I have two versions but
> the later one is packed away in my storage but I think the GALs were
> the same as my Rev A, RK1A-Q, RK2A-Q, and RK3A-Q. I also think the
> ROM was the same, RK1.3. I wouldn't mind giving the later ROM a try.
> Any chance of getting a ROM image I can burm?
>
> Wayne

I wouldn't mind trying this, also.  But I believe the work would be more
extensive for me.  I would need to:

1. burn a new EPROM
2. replace my GALs (I will have to check tonight to see what I have)
3. modify the 74F27N as per the scans you have made available

#1 and #3 I know I can do.  #2 I'm not sure about - I've never had to source
or replace GALs.  Can it even be done?  (Without simply stripping them off
of a working RamKeeper?)

Thanks
Tim