Re: GS-RAM, not Plus

[Greg Buchner <apple22@mn.rr.com>]

In article <Z-qdnRlnvOvzTpTYnZ2dnUVZ_rGdnZ2d@comcast.com>,
 "Bill Garber" <willy46pa@comcast.net> wrote:

> 
> "Greg Buchner" <apple22@mn.rr.com> wrote in message
> apple22-6D0112.16223614092006@news-rdr-03.rdc-kc.rr.com">news:apple22-6D0112.16223614092006@news-rdr-03.rdc-kc.rr.com...
> : In article <GN-dncXMEKE45ZTYnZ2dnUVZ_sudnZ2d@comcast.com>,
> :  "Bill Garber" <willy46pa@comcast.net> wrote:
> :
> : > "jsnospam@cimmeri.com" <js@cimmeri.com> wrote in message
> : > 1158246395.821534.223250@e3g2000cwe.googlegroups.com">news:1158246395.821534.223250@e3g2000cwe.googlegroups.com...
> : > :
> : > : Looking at the GS-RAM with the glue on
> : > : the right side, there's two verticle
> : > : stacks of chips.
> : > :
> : > : 1st (left): 74F139, 74F244, 74F244
> : > : 2nd (right: PAL26LB-15CN, 74LS245N
> : >
> : > Thanks,
> : >
> : > Mine is this PAL, and I'm sure you meant
> : > to type L8. You should look at that again.
> : >
> : >  "2nd (right: PAL16L8-15CN, 74LS245N"
> : >
> : > That would be the (c)1986 version. They
> : > changed the logic from that to (c)1987.
> : > I'm still studying them to see why.
> : > Neither one works properly in a ROM03,
> : > and I'm also looking at why that is also.
> : > Maybe a jumper wire or 2 will rectify it.
> :
> : I do remember that the GS-RAM/GS-RAM+ had different chips to plug in if
> : you had either a ROM 1 or a ROM 3 GS.  They had the instructions and the
> : different chip included with it.  When I got mine, I believe it came
> : already set up for a ROM 1.
> :
> : I ran across one the other day when I was looking for something else, I
> : don't know if it was for the ROM 1 or ROM 3 and for the life of me, I
> : can't remember where I saw it at this point...  I've looked in some of
> : the obvious spots in my apartment, but it hasn't helped me find it.
> :
> : Greg B.
> 
> 
> If you do run across it again, Greg, I'd appreciate a hi-res
> scan of the front and back, and any other info you have. I'm
> finding these cards very interesting.

Oops...not clear enough.  I found one of the chips.  Might have been for 
a ROM 1 or a ROM 3.  Didn't pay attention.  But then I guess I wouldn't 
have known for certain by just looking at it.

Greg

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