Re: Very mysterious card

[louiss@gate.net (Louis Schulman)]

In <3591C52F.106DEED1@swbell.net>, Rubywand <rubywand@swbell.net> writes:
>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 AM25L04 appears to be a 12-bit successive approximation
>register. Perhaps the card was used to interface with some piece of
>laboratory equipment.
>
This seems like the best guess.  The //e was from a large defense contractor,
and I have previously found lab interface cards (like an IEEE-488).

BTW, where did you get the info on the chip?

Louis