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I/O conflict

My Windows 98 system became unstable.  We had to reformat.  We took the SCSI from the Compro 4x8 recorder out and reformated C.  This gets complicated.  Got the regular CD drive going on E.  We tried installing windows, got through to almost the end of the first part, then got an invalid page fault on SUWIN,? crashed.  We put the SCSI back in.  At boot up, the primary master is different from what I remember.  The secondary master is like it used to be--the CD-ROM drive.  Then we get I/O conflict 3f8 and have to hit F1 to continue or delete to go into bios.  We have gone in and out of the bios, changing around everything but really don't know what we're doing.  Went ahead and tried to finish installing windows, got to the last part and ran into numerous illegal operations and finally installation terminated.  

I guess I need to know exactly what all the bios settings should be.  I know we'll have to format again but it's no use until we know what to do with the bios.  Could you please tell me what should they be set at with the SCSI out and then what should they be set at when Windows installs and we put it in again?  I have an abit LX6 motherboard, Pentium II 300, 128 RAM, Mitsumi CD drive, and the Compro 4x8 recorder.  Could you please help me?
Daniel
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ezrider081398

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My hard drive is PCI.  It is set to auto detect.  The CD recorder is SCSI.  The conflict we get at boot up is I/O conflict 3F8.  Then we have to it F1 to continue
When you put the SCSI controller back in did you place it in exactly the same PCI slot? If not put it back or try another slot?

3F8 is the address of COM1 serial port (perhaps it is COM2; check up that at BIOS setup). Try to disable COM1 at BIOS (section "Peripheral devices", or so), provided that you're using nothing on it (i.e.: the mouse, or other serial device).