One more try - Can you ID this S-100 Serial board?

[Jay Jaeger]

I had a look, and it seems to me that there is more going on on this
board than just serial ports.  It is even possible that the system it
was in had essentially re-purposed the board to use for a serial ports
in a way that the original designer did not intend.  That would explain
the lack of obvious level shifting - it may have been used for TTL level
serial I/O.

Also, there are lots more passive components on this board than I would
expect for a serial interface board.

A company with these initials made EPROM programmers, though their logo
was different - but perhaps it changed over time.  Maybe this was a very
early interface board to one of their very early programmers - and
perhaps it is missing some of the parts, like connector headers and
resistor packs, and then was re-purposed.

JRJ

On 9/30/2015 7:52 PM, drlegendre . wrote:
> (Months along, posts to several boards / lists, still no help on this one..
> so I'm giving it another shot. I'd really like to use this board)
> 
> Been trying to no avail to find any info on this 'MCT' S-100 serial card.
> I'm pretty sure the card works, as it came from a previously-working system
> - but all documents are missing, and without the info, I have no idea how
> to put it to use. Photos are here:
> 
> https://nerp.net/~legendre/altair/mct_serial_01.jpg
> https://nerp.net/~legendre/altair/mct_serial_02.jpg
> 
> Other than what I believe is an artwork / batch number on the rear, the
> only marking is "Assy 105510" on the front silk screen. My hunch is that
> this may have been a fairly generic 'OEM' type card which could have been
> re-badged and sold under one or more different names. So perhaps the docs
> exist under a name other than MCT?
> 
> Any help greatly appreciated - thanks!
> 
> -Bill
>