Dell OptiPlex GX520 & GX620: CPU Upgrade to P4 and Pentium D

[DeathBringer]

I used advances options in Phoenix Tool.
Create new topic in CPU Support Upgrades. And I'll try to help you.

[shulfe]

Hi everyone, thanks for work. A warning message is now not shown. But little trouble left. When "incopitable" processor installed after REBOOT command PC don't passed POST and halted POST code 17 or another .  SHUTDOWN command work well. I try different BIOS settings - no changes. May be I missed something, or BIOS need some mods. 
Sorry for my english.

[DeathBringer]

Tell S-spec of your CPU. And post screenshots of first (CPU) & third (Mainboard) tabs of CPU-Z.
And try this:
◦Power off the system from the power button or the wall jack.
◦Disconnect the power cable from the wall jack and remove all the cables connected to the back of system tower including the power cable.
◦Press and hold the power button pressed for 30 seconds.
◦Connect the power cable, keyboard and monitor cable only.
◦Power on the system and see if it works.

[shulfe]

S-spec sl8cp

[DeathBringer]

Ok. Did you follow my advice? Did you try to remove motherboard's battery for 30 sec?

[shulfe]

Clearing CMOS and battery removing does not produce results.

[DeathBringer]

Did this problem occur with native BIOS?

[shulfe]

This problem occur undo any versions of BIOS and all incopitable processors (PENTIUM D 8xx, 9xx)

[DeathBringer]

I found three places in 0B_9.ROM module where value in port 8B8 is checked.

Code:

mov     dx, 8B8h
in      al, dx
and     al, 2
cmp     al, 2
jnz     XXXX

In first time I modified only one place. Now I modified all three places.
Please check new version of mod.

[shulfe]

No changes. Once appeared this message.