CTCM reports this:

XMM-Version: 3.00 Internal Revision No. : 3.09 HMA available.
available extended Memory : 64443 KBytes.
Largest Block :64443 KBytes.
64443 KBytes requested . Handle = 43090
from addr.: 00111400

CTCM, translated by Thomas Pabst, copyright ct-Mag. V1.5b/t2
Processor-Timing : i486DX,i487DX,i486DX2,am486DX,am486DX2,am486DX4,am5x86
Processor CPUID : am486/ Typ:00 Fam:04 Mod:0F Stp:04
Clck : 129.2 MHz
internal Bus : 32 Bit between CPU and primary Cache or Memory
FPU : i487-Typ
L1 Cache : 8 KByte,4-way associative
L2 Cache : 16 KByte,4-way associative
Write Strategy L1 : Write Back
Write Strategy L2 : Write Back
Dirty Tag L2 : for Assoziativity > 1 not detectable

Through Put & Bus Performance: Main Memory from 00111400

Best Time for 8K MOVSD (Cache /Page Hits) : 44 mcs - 184.2 MByte/s
average t. for 8K MOVSD (Miss + Hit) : 2507 mcs - 3.3 MByte/s
average t. for 8K MOVSD (if clean) : 1262 mcs - 6.5 MByte/s
average t. for 8K MOVSD (if dirty) : 1287 mcs - 6.4 MByte/s
Main Memory 8K MOVSD (Cache misses) : 2507 mcs - 3.3 MByte/s

average with 16 KB L2-Cache /DOS (640K) : 1290 mcs - 6.4 MByte/s
average with 16 KB L2-Cache /WIN (4M ) : 1287 mcs - 6.4 MByte/s

I don't use a secondary cache for my 486, besides my only COAST module doesn't really work with my similar motherboard chipset either.

p.s. bump the multiplier to 4x, and try to aggressively time your memory as low as you can get while not freezing on soft resets and being able to boot. This greatly helps the am5x86 😀

leileilol wrote:

I don't use a secondary cache for my 486, besides my only COAST module doesn't really work with my similar motherboard chipset either.

p.s. bump the multiplier to 4x 😀

Wouldn't bother with the L2 cache either if it wasn't for that it makes this PC as slow as my 386DX 40mhz 😜

You have a socket 3 mobo with a coaster slot? if so it's fake...have one too...it's a PC chips board...it's completely L2 cacheless

Here's a pic of my cache.
Socketed and as you can see the traces go to the UM8881F chipset

Must be broken cache or chipset then and crap mobo design that doesn't detect it's broken and just ignores it like it was a L2 cacheless board?

Amigaz wrote:

it makes this PC as slow as my 386DX 40mhz 😜

there's your wing commander machine 🤣

leileilol wrote:

Amigaz wrote:

it makes this PC as slow as my 386DX 40mhz 😜

there's your wing commander machine 🤣

nah, 386DX 33mhz with some cache is the sweet spot for WC1 😁
It runs a tad to fast on my 386DX 40mhz 128k cache

You need to replace the cache with cache from a known working board before going further. This will rule things out.

Maybe this kind of strange behaviour can result if only the tag piece is broken or something similar.

Finally solved this pain-in-the-ass issue

in the end it was just a BIOS issue

I fiddled with turning the cache off in the BIOS....booted...turned it on...booted...nothing happened...did the same again turned off/turned on and my L2 cache just worked (?????) 😜

Now my sys performance is just what you can expect...get a nice score of 8.6 in pcplayer with my Diamond Stealth 64 (S3 vision 968) without univbe

Now I have really seen how much inpact a non active L2 cache can have 😮

The results are quite impressive to what I got before, here a speedsys result:

Sounds like you should have cleared your CMOS when upgrading the BIOS

h-a-l-9000 wrote:

Sounds like you should have cleared your CMOS when upgrading the BIOS

Thought I did that....these Phoenix bios'es are a mess....it feels like you have 3 different options to clear the BIOS 😕

The most reliable options are to pull out the battery or use a CMOS clear jumper on the board if present...

w00t

I would still remove the battery to clear the CMOS to clear out other stuff that might still be hanging in there.

nice work there, eh.

Was a big relief to me when I found the solution....it was to weird and unlikely that the cache was broken or tampered with

Now I need to find out why I can make the jachine to stay in non turbo mode 😜

Yes, it booted without the cache module. BTW, it has an UMC VIP (VESA-ISA-PCI) chipset and AMD 5x86/133 CPU. No major drop in performance. Only when I disabled internal cache had big speed loss.