Robbert
gloriouscowWhat's this? Oh, this is just everyone's favorite EGA card, the Tseng Labs ET2500.
What do you mean you've never heard of the Tseng Labs ET2500?
As best as I can tell this card and chipset are a ghost - the only evidence of it actually existing is, well, the fact that it is right there, existing.
Oh, and I have the ROM dump.
It looks, at first glance, that it may simply be a single-chip VLSI integration of the 3-chip ET2000, which would be somewhat boring I guess. The BIOS ditches all the Z80 stuff, since there's no Z80 here obviously. That does open the possibility that the ET2500 has a more ET3000-style built-in CGA compatibility.
If nothing else, the ROM is dated a full two years after the last known existing ET2000 BIOS, so that's pretty cool.
It still has all the cute funky lil fonts for 132 column modes.
There's an FCC ID on the card too which is helpful. What's interesting is that the FCC application was filed on the same day as the one for the ET3000, their VGA chipset.
What was the market for an EGA card in 1989 anyway?
adorfer@gloriouscow TIL: there was a Tseng Labs chip before ET3000!
@adorfer They started with the ET1000!