İntel P24D cpu and M912 V1.7 L1 wb cache setting \ VOGONS

İntel P24D cpu and M912 V1.7 L1 wb cache setting

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First post, by fsinan

Posted on 2025-12-18, 19:57

fsinan Offline

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Posts: 147
Joined: 2024-01-09, 19:35
Location: Turkiye

Set the jumpers according to P24D.

Set the L1 cache as WB in bios.

Chkcpu reports intel dx2 wb enhanced cpu, hwinfo reports as wb enhanced cpu. It is wb cpu, P24D.

But chkcpu reports l1 cache as configured write-thorough.

What is the problem? cleared the cmos and set everything again with amibios but didnt change.

Bios reports it as 80486dx2-66S.

System:1
Cyrix 5x86-120GP & X5-160ADZ
Lucky Star LS-486E
System:2
Intel DX4-WB & AMDDX4-120
PcChips M912 V1.7
System:3
AMD K6-2-475 & Cyrix 6x86MX PR-233
Asus P5A-B
System:4
UMC U5S-40
486UL-P101
System:5
P3 Coppermine 800EB
Gigabyte GA-6BX7

Reply 1 of 2, by Chkcpu

Posted on 2025-12-19, 10:07

Chkcpu Offline

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Rank: Oldbie
Posts: 673
Joined: 2021-05-13, 18:42
Location: The Netherlands

fsinan wrote on 2025-12-18, 19:57:
Set the jumpers according to P24D. […]
Show full quote

Set the jumpers according to P24D.

Set the L1 cache as WB in bios.

Chkcpu reports intel dx2 wb enhanced cpu, hwinfo reports as wb enhanced cpu. It is wb cpu, P24D.

But chkcpu reports l1 cache as configured write-thorough.

What is the problem? cleared the cmos and set everything again with amibios but didnt change.

Bios reports it as 80486dx2-66S.

Hi fsinan,

This thread should give you all the answers you need:
PC Chips M912 / DX4-100 and Write-Back L1 Cache

Although this thread talks about the DX4WB, it also applies to your P24D (486DX2WB). Only the multiplier jumper should be at x2 .
Also check the CPU for the required 3.3V or 5V Vcore and set the jumpers accordingly.

Cheers, Jan

CPU Identification utility
The Unofficial K6-2+ / K6-III+ page

Reply 2 of 2, by fsinan

Posted on 2025-12-19, 17:05

fsinan Offline

Rank Member

Rank: Member
Posts: 147
Joined: 2024-01-09, 19:35
Location: Turkiye

Chkcpu wrote on 2025-12-19, 10:07:
Hi fsinan, […]
Show full quote

fsinan wrote on 2025-12-18, 19:57:
Set the jumpers according to P24D. […]
Show full quote

Set the jumpers according to P24D.

Set the L1 cache as WB in bios.

Chkcpu reports intel dx2 wb enhanced cpu, hwinfo reports as wb enhanced cpu. It is wb cpu, P24D.

But chkcpu reports l1 cache as configured write-thorough.

What is the problem? cleared the cmos and set everything again with amibios but didnt change.

Bios reports it as 80486dx2-66S.

Hi fsinan,

This thread should give you all the answers you need:
PC Chips M912 / DX4-100 and Write-Back L1 Cache

Although this thread talks about the DX4WB, it also applies to your P24D (486DX2WB). Only the multiplier jumper should be at x2 .
Also check the CPU for the required 3.3V or 5V Vcore and set the jumpers accordingly.

Cheers, Jan

Tried all bioses and p24D settings, wb cache is not active.

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