I think this might be an old RAM disk card with a serial port?
@craigmaloney Tecmar Maestro maybe? My ancient IBM PC knowledge is fuzzy
@lmorchard Maybe? It came from a (now dead) Compaq Luggable.
@craigmaloney looks like expansion RAM board for an IBM PC or compatible.
What gender is the 25-way D-sub connector on the back? from memory (over two decades now) a *male* connector would be a RS232 (serial/COM*), whereas a female one would be parallel (LPT*). Parallel printers were also common back then.. could well be the item below which had both (connector on board was COM1/2 and a ribbon cable connected to another 25way female D-sub for LPT1/2)
@vfrmedia It has a 16450 so I'm thinking it's a 25 pin serial port.
Oh, apparently it's a Tecmar Captain.
@craigmaloney there is a link to a PDF of the entire manual for it in my previous toot, might be worth downloading in case you ever wanted to try and see if it worked in other similarly vintage equipment or were just curious (I wasn't expecting it to be so easy to identify 30+ year old hardware!)
@craigmaloney 1987 monster tech.
@craigmaloney The PAL is probably the most interesting feature of this board to me.
It's nice to see a setup that is so capable :)
This is a lovely expansion card, I must say.
Oh and it might also have a clock on it.
Fun stuff.