[vcf-midatlantic] ram card identification?

[Steven Michelsen]

The card I have is entirely un-marked.  Here's a picture.

https://dl.dropboxusercontent.com/u/65762317/forums/ram_card_for_IBM_5150.jpg



-----Original Message-----
From: vcf-midatlantic [mailto:vcf-midatlantic-bounces at lists.vintagecomputerfederation.org] On Behalf Of william degnan via vcf-midatlantic
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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