If you were hoping to find the ultimate 486 motherboard here, unfortunately no... :o)
The UNIchip was already used on some (late) 386 motherboards. I found this is a quite good exemplar to start with measurements of 486 boards - which gave it the status of "THE REFERENCE"... :o)
Jumper
I didn't find a manual for this board but the silk print on the board explains all important jumpers.
In the web is often claimed the board is a clone of the Gemlight GMP-486UNP and for this board exists a manual.
Measured performance of the board
I would say, the performance of this chip is mid-table for 1993: HiNT or Forex are better PcChip's SARC slower.
The board has "Write-Back" (as cache strategy) in its name but this is also urgently needed: if you select "Write-Through" in the bios the transfer rate to the cache drops by app. 35 percent.
All measurement results are documented here.
Facts
| Manufacturer: | DataExpert Corp. |
| Year of manufacture: | May 1994 |
| Bios-String: | 40-0200-001107-00101111-111192-U4800VLX-F |
| Bios: | AMIBIOS (64kBytes) |
| Chipset: | UNIchip U4800-VLX (27/1993) 4L04F1905 |
| Manual: | See chapter "Jumper", please. |
Summary
Strong points:
- Perhaps the most important thing is: the board has no really weak points...
- Seven full ISA and three VesaLocalBus slots without any height or length limitations
Weak points:
- Quite low performance with the cache strategy "Write-Through"
falk.richter*at*yandex.com
Last update: May 22, 2021