evasive wrote on 2021-04-24, 10:55:
So a Genoa board sold under the FreeTech brand since the POST screen mentions the "10X".,or the other way around as the markings absolutely say: FreeTech board (ASY xxx-00ABC-xx is FreeTech/Flexus by definition). This BTW means the model name is 486F10X, so thank you for that info, still we would like to have a bios dump 😁 One reason for that is to find the actual core version of the bios, as the POST ID seems to be mutilated a bit. Where that 1017 is, the should be 101094-<chipset info>-8/0/K something I think. The only way to dig that up is from the bios dump itself.
Was playing around with the machine today, seeing if there was any ways I could tweak the BIOS (Wait states, timings, etc) or put a different BIOS on the board.
I have attached a zip file with a few different saves of the BIOS using NSSI and AMI BCP, also a couple of screen shots for further information. I would be interested to see someone else's analysis of this BIOS, this board is a bit of a mystery, only found one press cutting for it online, which again states it is a Freetech board.
The lack of BIOS options is annoying, especially when compared with other BIOS options of the era, I was thinking of making my own BIOS image, but it has been a very long time since I did that. (i.e. do a hash of two similar BIOS images one with EISA compatibility and another with more flexibility).
So I tried a little experiment, I inserted a similar AMI 486 ISA BIOS (had a few lying around) in the machine to see what would happen, better then expected really:
1) The ISA BIOS only sees up to 32MB
2) Does not initialise the EISA cards, apart from the VGA which works from boot
Both results as expected, but it would successfully boot up to needing me to insert a boot disk, I was just seeing if playing with any wait states on a BIOS with more options would improve memory performance, but this all needs a little more experimentation, i.e. put a ISA IDE card in and see if that works and boots, etc. But now my baby son is awake, so no more playing with computers for me today.
Also I put 15ns cache chips in, as I said before from experience this usually achieves nothing apart from bragging rights but you never know, and sure enough, it achieved nothing, benchmark results remained the same.