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Thinkpad T40 adding Dothan C0 stepping support
#41
You can do in grub2
wrmsr 0x199 0x1128
before OS loading.
find
quote
#42
(11-18-2022, 01:37 PM)DeathBringer Wrote: 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
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quote
#43
(11-18-2022, 11:51 AM)DeathBringer Wrote: 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?
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quote
#44
If you asked then you can't do it.
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quote
#45
(11-19-2022, 07:56 AM)DeathBringer Wrote: 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.
find
quote
#46
You need to add new code to MBR:
xor edx,edx
mov eax, 1128h
mov ecx, 199h
wrmsr
find
quote
#47
(11-19-2022, 10:01 AM)DeathBringer Wrote: 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?
find
quote
#48
Yes.
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quote
#49
Try to flash my 3rd mod.
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quote
#50
(11-20-2022, 05:49 AM)DeathBringer Wrote: Try to flash my 3rd mod.

Sorry, a fiercely stubborn bios gives error 28640 again(
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quote


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