I believe is a graphic card... the DB9 connector definitely matches what was used by MDA, CGA and Hercules cards on the oldest PCs.
Another thing that drew my attention is the Xtal: 14.31818 MHz, which is x3 the clock frequency of the earliest PCs (8088 @ 4.77) and x4 the NTSC color subcarrier (3.58 MHz).
Close to that crystal is another strange IC, the ICS1394 -- the rest (besides the big VIDCTLR) seem to be GALs and off-the-shelf 74 series. Took me a while to find some info on it, but according to http://www.datasheetpro.com/node/19718 it's a Video Dot Clock Generator.
Anyway, it's likely to be a monochrome card -- can't see any linear components (e.g. transistors)
Another thing that drew my attention is the Xtal: 14.31818 MHz, which is x3 the clock frequency of the earliest PCs (8088 @ 4.77) and x4 the NTSC color subcarrier (3.58 MHz).
Close to that crystal is another strange IC, the ICS1394 -- the rest (besides the big VIDCTLR) seem to be GALs and off-the-shelf 74 series. Took me a while to find some info on it, but according to http://www.datasheetpro.com/node/19718 it's a Video Dot Clock Generator.
Anyway, it's likely to be a monochrome card -- can't see any linear components (e.g. transistors)