First post, by seanneko
I bought a 486-VIP-IO2 recently from the Ukraine seller who had a number of them.
This site claims that it supports both AMD 5x86-133 and Cyrix 5x86 with the latest BIOS:
http://www.elhvb.com/supportbios.info/Archive … FIC/faqs486.htm
The issue is that the motherboard is poorly documented, both in terms of no manual being available, and also the jumpers not being clearly marked.
I can get the AMD 5x86 to work, but it's always shown as being a 100MHz DX4 regardless of how I jumper the board. I thought maybe the BIOS is just displaying it wrong, but benchmarks show that it's performing the same as (well, slightly slower actually) than an Intel DX4 100.
The Cyrix 5x86 will begin POSTing but then hang part way through.
Does anyone have these CPUs working properly on this board? How is it supposed to be jumpered for them?