Thinkpad T40 adding Dothan C0 stepping support

[DeathBringer]

You can do in grub2
wrmsr 0x199 0x1128
before OS loading.

[wastedyears]

You can do in grub2
wrmsr 0x199 0x1128
before OS loading.

Added it to grub2.
However no miracle happened.
Windows boot time was so long.
Cpu is 598Mhz.

I executed a command
rdmsr 0x199
and saw output
Read MSR 0x199 : High 32bit(EDX) = 0x0000000000000000, Low 32bit(EAX) = 0x0000000000000612
63    56 55    48 47    40 39    32 31    24 23    16 15    8 7      0
00000000-00000000-00000000-00000000-00000000-00000000-00000110-00010010

Ps. Debian changed cpu speed after your trick.
/proc/cpuingo gives 1695Mhz

anyway many thanks man

[wastedyears]

You can use custom OS loader. Or patch MBR or boot sector.

May I ask you? What way can I patch MBR or boot sector?

[DeathBringer]

If you asked then you can't do it.

[wastedyears]

If you asked then you can't do it.

I was misled you, I've decided your words about patching MBR or boot sector could solve improper CPU speed in Windows.

[DeathBringer]

You need to add new code to MBR:
xor edx,edx
mov eax, 1128h
mov ecx, 199h
wrmsr

[wastedyears]

You need to add new code to MBR:
xor edx,edx
mov eax, 1128h
mov ecx, 199h
wrmsr

Do I understand right - this code always set cpu to a maximum speed?

[DeathBringer]

Yes.

[DeathBringer]

Try to flash my 3rd mod.

[wastedyears]

Try to flash my 3rd mod.

Sorry, a fiercely stubborn bios gives error 28640 again(