First post, by mpe
Building an ultimate 486 VL-Bus system for my benchmarking project to run against Socket 4/5 platforms.
Will be running high-end 486 chips (Am 5x86, Cyrix 5x86 and Pentium Overdrive 83). Even with some mild overclocking.
Which of these two boards do you like better. This one (A-Trend 1442G):
or (ELITEGROUP UM4981 rev 1.0):
I am currently torn between these two. I like the I/O on the UMC. But the Opti has better layout (no issue with long ISA cards) and one more VL-Bus slot. And it has also board printed markings which helps to configure for the CPU.
On the other hand I have no documentation whatsoever for the Opti board (and what I found online is very confusing). Also no board markings. Last couple of days I've been trying to figure out the jumper setup using multimeter. So far I've been able to figure out settings for Cyrix 5x86 in WB mode and can even overclock to 120 MHz, but no luck with Am5x86 at 133 MHz. Only in wt mode and with extra interposer.
Also the UMC doesn't have any visible CMOS battery or Dallas chip. Only the external battery header. It does seem to remember settings somehow without the external battery. It is a bit of mistery for me how is it doing it.
Anybody by any chance has a manual for either of these boards?