486 BIOS (AMIBIOS) reporting different cache and CPU-speed \ VOGONS

486 BIOS (AMIBIOS) reporting different cache and CPU-speed

Posted on 2016-02-08, 08:29

saturday_sun Offline

Rank Newbie

Hello!

Recently started up an old 486 with a DX2-66 CPU.

When i boot and reboot (soft) the BIOS shows different amounts of cache and CPU-speed.

Sometimes it shows
64KB Cache Memory
80486DX2-66Mhz CPU
Starting MS-DOS...

Sometimes it is
256KB Cache Memory
80486DX2-66MHz CPU
Starting MS-DOS...

And after pressing reset button it shows just
80486DX2-50MHz CPU
Starting MS-DOS...

Any ideas? Hardware problems? BIOS bug?

It's an AMIBIOS (American Megatrends).

Posted on 2016-02-08, 10:50

alexanrs Offline

Rank l33t

Have you tried CACHECHK and SPEEDSYS to check if this is just a cosmetic error or that the performance is actually hampered?

Posted on 2016-02-08, 12:33

saturday_sun Offline

Rank Newbie

HIMEM started to show an error message at boot aswell, so I tried changing the memory sticks.

Now everything looks normal when booting the computer, BIOS reports right cache and CPU speed, even after soft reboot. Speedsys shows DX2-66MHz.