Re: Very mysterious card

[Rubywand <rubywand@swbell.net>]

Louis Schulman writes ...
> 
> This card was found in slot 5 of an Apple //e, and was specifically marked
> for slot 5.  The main chip is an AM25L04PC, which is not even listed in the
> Chip Directory.  There is a 34 pin block, which was hooked up to a long
> ribbon cable attached to a large Centronics connector (looked like SCSI type).
> 
> The card says REV4 C1980, and it appears that the name and other information
> was intentionally ground off!  The card has two adjustable Pots, and 18 total
> chips.  The //e that it was in had a Grappler printer card and a Super Serial
> Card in other slots, along with a standard disk controller in slot 6.
> 
> Well, experts, what is it?  A very early SCSI card?  One more thing, there is
> a label that says SN 6025.
>

     The AM25L04 appears to be a 12-bit successive approximation
register. Perhaps the card was used to interface with some piece of
laboratory equipment.

  

Rubywand