[vcf-midatlantic] ram card identification?
bob.flanders at gmail.com
Mon Nov 7 13:53:14 EST 2016
It has 9 chips per row. Doesn't that indicate it does have parity?
I bet the switches indicate what bank this memory starts at and (maybe) how
many banks are installed.
On Mon, Nov 7, 2016 at 1:36 PM, Steven Michelsen via vcf-midatlantic <
vcf-midatlantic at lists.vintagecomputerfederation.org> wrote:
> The card I have is entirely un-marked. Here's a picture.
> -----Original Message-----
> From: vcf-midatlantic [mailto:vcf-midatlantic-bounces at lists.
> vintagecomputerfederation.org] On Behalf Of william degnan via
> Sent: Monday, November 07, 2016 1:30 PM
> To: vcf-midatlantic <vcf-midatlantic at lists.vintagecomputerfederation.org>
> Cc: william degnan <billdegnan at gmail.com>
> Subject: Re: [vcf-midatlantic] ram card identification?
> On Mon, Nov 7, 2016 at 1:20 PM, Neil Cherry via vcf-midatlantic <
> vcf-midatlantic at lists.vintagecomputerfederation.org> wrote:
> > On 11/07/2016 12:07 PM, Steven Michelsen via vcf-midatlantic wrote:
> >> Hmmmm..... six switches.... could that equal 6 banks of 64k? I hate
> >> to guess at this.
> > Highly unlikely, the AST reference page seems to ring a bell.
> > I see that minuszerodegrees has a page on AST cards with plenty of
> > options
> >> for switches, but which one might represent mine?
> >> http://www.minuszerodegrees.net/manuals/AST/Cards/Many%20AST%20cards.
> >> txt
> > Rough guess:
> > MEMORY INSTALLED ON 6-PAK
> > 6 dips sw. (note that sw7 is NA and that SW8 is parity which your
> > board doesn't have).
> > See how your current switches match up with the existing board. Assume
> > that it was working but that the memory board may not have the correct
> > initial addressing. I do recall you said it worked when the case was
> > open. This gives us starting point to intelligently guess.
> > Oddly enough I only owned 1 PC clone that ran DOS. My work machines
> > were Windows (or OS9 & Flex). None were the type of PC clone that
> > would need this board. Although I built dozens of the clones. Those
> > usually the memory on board (3x256KB or 4x256KB). The one DOS machine
> > I had was a Packard Bell and was a bad clone.
> Which model is this? A six pak?
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