L2 Cache

Speedup

I wanted to get more speed out of L2 cache. Memory settings are automaticaly configured by BIOS.

Baseline settings

Changed BIOS to manual and tested with speedsys.

Cache/Memory Benchmark                

                     Read          Write         Move         Average  
 Cache Level 1    113.16 MB/s    38.29 MB/s   143.89 MB/s    98.45 MB/s 
 Cache Level 2     61.30 MB/s    38.05 MB/s    32.25 MB/s    43.87 MB/s 
 Memory            26.51 MB/s    38.65 MB/s    11.35 MB/s    25.50 MB/s 

New settings in BIOS

512 KB L2 cache

Bought some new UM61512AK-15 L2 chips so i can upgrade to 512KB of L2 cache. I all ready had 4.
Installed and changed some jumpers on motherboard.

512 KB of L2 cache

Hardware configuration

Setting up this old PC is nothing special.
I used th99 archive to get spec for motherboard. But there are some differences as some markings and jumper locations are in different places.

I clocked CPU to 120MHz. It has 8KB of L1 cache.
Replaced L2 cache chips with UM61256AK-15. There are four 32K x 8 + one 32K x 8 as TAG. Total 128KB of L2 cache. Maximum can be 1MB, but i don't have chips. BIOS setting is WB.

First HDD all ready had Windows 95 code name Chicago installed. It is first version 4.00.950. See wikipedia.

I added second HDD from my collection FUJITSU MPB3032ATU.

Video card is PCI S3 Trio32/64 86C732 with 1MB of RAM.
Also PCI sound card Creative 5880. Not tested currently.
Motherboard has on free slot, witch can be filled with PCI USB board i have (VT6212L).