Unfortunately I suspect that the Intel/AMD chip on the ACB-2072 is some sort of mask-programmed 8051 or similar. (That would be unusual for Adaptec, who usually preferred to keep their microcode external.)

I've added most of the BIOS versions at http://www.minuszerodegrees.net/xt_clone_bios/xt_clone_bios.htm

with the exception of two ...

... the Faraday one runs into a halt opcode, and the Hedaka HED-919 is a 286 mainboard that has only ISA8 slots ... can't figure out where and how to add that one properly.

I'd like to move the content of genpc.cpp over to pc.cpp and delete src/mame/drivers/genpc.cpp

- pc.cpp has provisions for loading different length BIOS files
- pc.cpp has provisions for speed switching ("Turbo")
- in src/devices/machine there is already a genpc.cpp/genpc.h pair

There's a BIOS I'd like to add that is 16K instead of the regular 8K, and rather than fiddling with the ROM loading of genpc.cpp I think it makes more sense to move over the content as outlined above.
This would mean that pccga, pcega, pcherc, pcmda and pcvga would reside in pc.cpp rather than genpc.cpp.

Any objections?

The idea is that genpc is for unbranded PCs (GENeric) and pc.cpp is for PCs with brands. (And if we hit a critical mass of some brand or it's got unique hardware, it gets its own driver). I believe that's gotten a little out of hand lately, and it's partially my fault for not enforcing it on submissions.

Yeah, I got that. The one in question, last in the 8088 list on http://chukaev.ru54.com/bios_en.htm, is a generic one but appears to be a genuine dump from a 27128 - 16KB rather than the 8KB that is expected in genpc.cpp.

I'll leave that one to the experts then.