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| <H2><A NAME="s22">22. Hardware incompatibility</A></H2> |
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| <P>Several people have noticed that they lose typed characters when |
| a floppy disk is active. It seems that this might be a problem with |
| Uni-486WB motherboards. |
| <P>Tjalling Tjalkens (<CODE>tjalling@ei.ele.tue.nl</CODE>) reports very similar problems |
| with "a no-brand GMB-486 UNP Vesa motherboard with AMD 486DX2-66 CPU" - |
| during floppy activity some keystrokes are lost, during floppy tape streamer |
| (Conner C 250 MQ) activity many keystrokes are lost. |
| <P>Some people experience sporadic lockups - sometimes associated to |
| hard disk activity or other I/O. |
| <P>Ulf Tietz (<CODE>ulf@rio70.bln.sni.de</CODE>) wrote: |
| `I have had the same problems, when I had my motherboard tuned too fast. |
| So I reset all the timings ( CLK, wait statements etc ) to more |
| conventional values, and the problems are gone.' |
| <P>Bill Hogan (<CODE>bhogan@crl.com</CODE>) wrote: |
| `If you have an AMI BIOS, you might try setting the Gate A20 emulation |
| parameter to "chipset" (if you have that option). Whenever I have had |
| that parameter set to any of the other options on my machine |
| ("fast", "both", "disabled") I have had frequent keyboard lockups.' |
| <P>There may be a relation between keyboard problems and the video card in use. |
| <P>Shawn K. Quinn (<CODE>skquinn@wt.net</CODE>) wrote: |
| `I have a Zeos Pantera Pentium-90 that originally came with a Diamond Stealth |
| 64 S3-based video card. Under X I frequently got q's inserted into my text |
| (how annoying) especially if I typed very fast (during Netrek for instance, |
| even more annoying because guess what that does :-( ). |
| Switching to a Creative Labs Graphics Blaster MA202 solved the problem. |
| I'm assuming the Stealth 64 did something funny with the timings.' |
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