You can try BIOS patcher with it.

http://www.rom.by/articles/BP/index_english.htm

Unfortunately that isn't going to work, as BIOS-Patcher assumes that the BIOS file is LHA packed (early Award BIOSes, such as this one unfortunately, are unpacked. I tried another Award BIOS editor on it, but the editor couldn't make heads or tails of the file!) and it also assumes the file is at least 1 Mbit (128KB). This one is merely 64KB. (I *could* try doubling the file up via COPY /B file+file...)

Yeap, this be an odd (expletive deleted) duck.

Edit: Well, knowing that it's uncompressed I might try AwdHack with it. Blah, stupid 64-bit Windows! I guess I'll have to get DOSBox set up...

Update 2: Well, using MODBIN I was able to crudely hack the Chipset Features menu back into BIOS setup, which allowed me to tune up the memory a fair bit (shaving some 10us off the uncached-area access times reported by CACHECHK v7). It still needs LBA support, but for now Ontrack Disk Manager will have to do. I won't post the modded BIOS until I figure out how to fix some glitchy things (the hack to re-allow the Chipset Features menu overwrites the arguably useless Power Management Setup menu, which does nothing useful for this motherboard and has all the defaults set to disabled anyway). SPEEDSYS 4.78 indicates the IH4077C, configured with a 486DX-50 (50MHz FSB), has 54.22 MB/s memory bandwidth, and offers 24.15 MB/s memory throughput, which is still very low for a 50MHz bus, but far, far better than what it was getting prior to the BIOS hacks. I am so happy I invested in that Needham PB-10 programmer and Datarase II EPROM eraser kit!

Update 3: Just noticed it was dropping pixels in Speedsys at 40+ MHz with the Trident TVGA9400CXi card, so I put an Oak OTI-087 (which is NOT a slug, btw, despite the rather bad reputation it got from having to butt heads with the P9000 chipset over a PCI bus) ISA video card in there. Sure enough, it stopped dropping pixels. Obviously old VLB boards get cranky with speeds > 33 MHz.

Another update, I finally fixed the glitchy menu options and re-enabled all the hidden BIOS menu options (save for 'Additional Informations', that does not seem to do anything overly useful to the average user). They all seem to work, though I've only given them minimal functional testing. Now all the options, including Power Management, are available. I've named this modified BIOS 1.00.00A1, to differentiate it from the original 1.00.00 revision.

As usual I assume no responsibility for what may or may not happen should you choose to use this BIOS, use at your own risk!

The hacked 1.00.00A1 BIOS for the IH4077C: https://www.dropbox.com/s/j2dca2i917n1m22/IH4 … HACKED.BIN?dl=0

Again, here's the original "AT&T-authorized" IH4077C 1.00.00 BIOS: https://www.dropbox.com/s/ohkc8gr60rexgkt/IH4 … .00.00.BIN?dl=0

well done!