Reinstall BIOS when removing a 1802-01c9 wifi-card?

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#1 Post by **RealBlackStuff** » Sun Mar 04, 2007 7:03 am

I have removed the Atheros wifi-card from my T23 (see sig) and want to put in the Intel wifi/modem-card from my T30.
The Atheros card caused the 1802 error in the T23, which was then patched with No-1802.
After the boot-error 01c9 of 2 ethernet cards, I used to press Esc and the T23 booted up without any problems and everything was fine.
I have now also uninstalled all the Atheros stuff from Windows XP.

Q: Before I put the Intel card in my T23, do I need to reset the BIOS because of this 1802-patch, or can I happily ignore that?

The Intel card is:
IBM ThinkPad High Rate Wireless Mini PCI Card w/Modem 802.11b WIFI P/N 26P8519 / FRU 26P8520

Website · #2 Post by **tfflivemb2** » Sun Mar 04, 2007 9:53 am

You should still be able to insert the Intel card. I believe that the no-1802.com patch essentially "adds" the Atheros card to the whitelist, thus allowing you to use the card.

If you do run into a problem, you can always go back and reinstall the current BIOS version.

#3 Post by **RealBlackStuff** » Sun Mar 04, 2007 10:45 am

As it happened, there was a newer T23 BIOS version available, so I D/L'd and installed that. Problem was moot in that case.
Thanks for the info anyway.

danage · #4 Post by **danage** » Sun Mar 04, 2007 6:31 pm

nothing needs to be changed. the no1802 doesnt change the bios at all. the no01c9 changes the atheros card, not the computer.

#5 Post by **RealBlackStuff** » Sun Mar 04, 2007 6:52 pm

I understood that the no-1802 de-activates the whitelist which is in the BIOS.
That 01c9 only works on Atheros chipsets up to 5004, mine has a 5006.
I have no problem hitting Esc at boot time.
The chip that other people have 'clipped' on different Atheros models is not accessible on my card. There is a metal cover soldered all around it (and other components).

#6 Post by **tomh009** » Sun Mar 04, 2007 7:11 pm

Correct. The no-1802 doesn't change the BIOS -- it simply sets a bit in the CMOS to deactivate the wireless card compatibility check.

#7 Post by **RealBlackStuff** » Mon Mar 05, 2007 3:00 am

You're getting me confused now, AFAIK the BIOS is stored on and the sole occupant of the CMOS, different names for the same thing.
So no-1802 affects the BIOS (and with it the CMOS).

Anyway, the transplant went without any hiccups.
After having to apply No-1802, the Atheros card now works perfectly in the T30 (though still with 01c9-Esc at boot).
That Intel card is rubbish by the way, it only allows WEP security, no WPA. I'll get another card for the T23 eventually.
Until then I'll use my trusted 802.11b/g PC-card.

danage · #8 Post by **danage** » Tue Mar 06, 2007 10:25 am

nah. the bios sits in a protected and usually not writeable area on a flash chip. this is non-dram. the bios settings are stored in the cmos dram, which can be reset by unplugging the cmos battery and are not crucial to the computer working.

its really somewhat a leftover from the original ibm pc's

Reinstall BIOS when removing a 1802-01c9 wifi-card?

Reinstall BIOS when removing a 1802-01c9 wifi-card?

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