This looks like an interesting card. Does it have any cache or RAM onboard? It doesn't appear that way. (Those toshiba chips appear to be SRAMs)
It's interesting that there are four sockets for 40-pin ICs. Looks like the two on the left are for the V30 and 8087. But what are the two on the right for? One looks like it's holding a dummy chip. Are you supposed to plug your old 8088 into one of those sockets?

Thanks!

It is indeed an interesting card. I don’t think they had cache in there, but cannot tell for certain.

The ribbon would connect to the connector on top of the “dummy” chip (it is indeed an Intel 8088 with markings faded), and plug into the motherboard’s 8088 socket.

You are quite correct - the empty slots are for the 8087 counterparts of the 4.77mhz 8088 and the 9mhz NEC 8086 v30.

Now if I could decipher what those pesky 10 switches are….

So wait...you're telling me that this thing can take TWO 8087s? Now that's crazy!

From what I can tell your card is very rare. I only managed to find one discussion about it on VCFed, where the author asks if anyone had one, because he'd seen it in a magazine but never in real life.

My guess is that there might be some usenet posts about it, but tracking down the manual will be hard.

If you have it in slot 8, try moving it to another slot.

Plasma wrote on 2022-05-23, 04:27:

If you have it in slot 8, try moving it to another slot.

Thanks! Nope - it’s in slot 3 I believe

Anonymous Coward wrote on 2022-05-23, 00:03:

So wait...you're telling me that this thing can take TWO 8087s? Now that's crazy!

Yup. The two 8087’s would be rated for different clock frequencies, and thus two different chips would be needed.