[Coco] Upgrading RAM for CoCo 1

Don Akins donald at dra.space
Sat Apr 25 08:37:40 EDT 2015


Ahh, thanks for the info. What made me think the chips were bad is that they
have scarring on the pins of some of them as if they arced from a short.

> 
>     On April 25, 2015 at 12:20 AM Arthur Flexser <flexser at fiu.edu> wrote:
> 
> 
>     You realize that it's normal for PRINT MEM to show something like 8K in a
>     16K CoCo? (PRINT MEM is only showing the memory available for Basic
>     programs, which doesn't include 8K or so reserved for the operating
>     system. I think 8487 is what you should see with Extended Basic). If you
>     had bad RAM chips, the CoCo likely would show garbage on screen if it
>     booted up at all.
> 
>     Art
> 
>     On Fri, Apr 24, 2015 at 10:19 PM, donald at dra.space donald at dra.space <
>     donald at dra.space> wrote:
> 
>     > Hi Guys,
>     >
>     >
>     > I recently bought a silver CoCo 1 and when I booted it up it only
>     > recognized 8k
>     > ram out of 16k. So I opened it up and noticed that some of the ram chips
>     > appeared to have burnt out. The motherboard has jumpers for 64k so this
>     > board
>     > must be one of the later revisions of the CoCo 1. I pulled one of the
>     > chips I
>     > out which is a 4116N-3GP. Are there any equivalent 64k chips out there
>     > today for
>     > a CoCo 1?
>     >
>     >
>     > Don
>     >
>     > --
>     > Coco mailing list
>     > Coco at maltedmedia.com
>     > https://pairlist5.pair.net/mailman/listinfo/coco
>     >
> 
>     --
>     Coco mailing list
>     Coco at maltedmedia.com
>     https://pairlist5.pair.net/mailman/listinfo/coco
> 


More information about the Coco mailing list