Story of a Tp 770 (9548-310) upgrade
Posted: Mon Nov 20, 2006 12:47 pm
I hadn't used this machine for a long time before i found this forum about 3 weeks ago. Reading in here i found out it might be possible to upgrade the pentiumI 233 MHz inside to a pentiumII. Found 1 on ebay (PMF36602001AA with cache on die) very cheap and installed it. On boot-up i noticed that the internal memory wasn't switched of automatically (as it was before when using the pI) and i had now more than 256MB installed.... Next came the 192 error and the fan stopped spinning 
After doing the "esc" + "f1" procedure, the OS (w2k for me) started to load but then crashed before finishing. Next step for me was to disable the internal memory in bios (80 -> 81). On next boot memory count was only showing the memory in the slots and after doing the "esc" + "f1" again the OS booted as it should and installed new hardware (new chipset, etc). Success, i thought. Using the laptop i then noticed it getting very warm and it consequently crashed after a while of intensive use. The stupid fan never came on after boot-up. Only solution for me was to connect the fan directly to 5v so that it is allways running when the laptop is switched on. No more overheating now and even working nicely with a slight overclock @404 MHz. When i tried higher overclock, the thinkpad crashed very badly and i had to reinstall the OS (my own fault). Trying to do this, i found out that i can no longer boot from the cd-rom when an error message is shown on boot-up (regardless of the selected boot sequence in bios). Installing the Os from another partition of the hdd did work fine. To my surprise w2k now detected my system as an acpi system (was apm on the old install) and i now even get some temperature reading from mobile-meter. The system is currently running very well and i can live with the "esc" + "f1" procedure on boot-up.
A very big "thank you" for all the info on this forum.
But there are a few questions open for me:
Why is the 256MB memory barrier still there? I had that when using the pI with 430tx chipset, but now changed to pII with 440BX/ZX , so i was expecting that limitation would have been gone.
When using everest to show me the installed devices, i have now 14 ! fans and 7 ACPI thermalzones installed ??? Mobilemeter only shows me 4 temperatures from which 2 are constantly 27 degrees, the other 2 are changing with the use of the cpu.
Maybe someone in here can offer me an explanation for these strange things or even knows of a way to get rid of the 192 error on boot?
Manfred
After doing the "esc" + "f1" procedure, the OS (w2k for me) started to load but then crashed before finishing. Next step for me was to disable the internal memory in bios (80 -> 81). On next boot memory count was only showing the memory in the slots and after doing the "esc" + "f1" again the OS booted as it should and installed new hardware (new chipset, etc). Success, i thought. Using the laptop i then noticed it getting very warm and it consequently crashed after a while of intensive use. The stupid fan never came on after boot-up. Only solution for me was to connect the fan directly to 5v so that it is allways running when the laptop is switched on. No more overheating now and even working nicely with a slight overclock @404 MHz. When i tried higher overclock, the thinkpad crashed very badly and i had to reinstall the OS (my own fault). Trying to do this, i found out that i can no longer boot from the cd-rom when an error message is shown on boot-up (regardless of the selected boot sequence in bios). Installing the Os from another partition of the hdd did work fine. To my surprise w2k now detected my system as an acpi system (was apm on the old install) and i now even get some temperature reading from mobile-meter. The system is currently running very well and i can live with the "esc" + "f1" procedure on boot-up.A very big "thank you" for all the info on this forum.
But there are a few questions open for me:
Why is the 256MB memory barrier still there? I had that when using the pI with 430tx chipset, but now changed to pII with 440BX/ZX , so i was expecting that limitation would have been gone.
When using everest to show me the installed devices, i have now 14 ! fans and 7 ACPI thermalzones installed ??? Mobilemeter only shows me 4 temperatures from which 2 are constantly 27 degrees, the other 2 are changing with the use of the cpu.
Maybe someone in here can offer me an explanation for these strange things or even knows of a way to get rid of the 192 error on boot?
Manfred