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| Newer page: | version 16 | Last edited on Tuesday, March 16, 2004 11:15:47 am | by JohnMcPherson | Revert |
| Older page: | version 15 | Last edited on Sunday, August 10, 2003 12:32:43 pm | by CraigBox | Revert |
@@ -1,23 +1,5 @@
This page is mostly here for my reference, and to vent as I couldn't find this information anywhere else (ie google).
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-! [IBM] Thinkpad Laptop External Microphone
-Some (or all?) thinkpads (such as my Thinkpad 600) have non-standard microphone sockets. They expect an external microphone to either be powered, or to make contact with a metal ring surrounding the socket, which supplies +5V, and give it to the "tip" of the jack. This is discussed at [http://www.pc.ibm.com/qtechinfo/LWIK-3QZJKZ.html?up=unknownuser]. If you plug in a regular, un-powered microphone then nothing will happen.
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-! [IBM] Thinkpad Simple Boot
-Thinkpads in the 600-770 series have a "simple boot" flag which is really a PNP OS=no flag. You should ''disable'' it for Linux 2.4, at least if you want the sound to work. Change the BIOS by pressing and holding F1 ''before'' you power up the machine, and hold it until the BIOS screen appears. The simple boot flag is under the Quick Boot icon. '' My sound works ok with this enabled, but see below'' -- JohnMcPherson
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-! [IBM] Thinkpad 600 soundcard
-The sound card uses the es4232 driver - this is documented on many pages on the web. However, I couldn't get the module to load - it couldn't find the card. I found this page that helped me... I had to boot into windows to run a utility to configure the soundcard (the ps2.exe file was in c:\windows\options\utility)
- > rem the cs4232 0x530, irq 5, dma 0 1
- > ps2 audio address 530
- > ps2 audio irq 5
- > ps2 audio sbaddress 220
- > ps2 audio dma 0 1
- > ps2 audio enable
- > ps2 audioctrl address 538
- > ps2 audioctrl enable
-After rebooting into linux, my sound worked. (This was a 600E Thinkpad)
! US Robotics Modem Power Supply
I had two USR modems in a bag without realising that their power adapters were different voltages, and which went with which is not documented anywhere. So for the benefit of anyone who needs to know, the 20 volt pack works with the 33.6K Sportster Voice modem and the 9 volt pack works with the 56K Voice modem. ''Disclaimer: if I have got this wrong, and this causes you to burn down your house, it's not my fault.''
