I believe "PIC" allows for the standard 16 IRQ's, while "APIC" allows for more (unlimited?). My BIOS
is set for APIC and everything works great in XP - EXCEPT - my old Adaptec 2940W SCSI card will no longer "rescan" the bus correctly. This means I need to turn on the scanner and reboot for detection if it's not altready turned on.
Today I tried resetting my BIOS
to "PIC", but XP would never boot. in fact, I never even got the logon pic! I guess, what I'm looking for, is anyone running in PIC mode? I'm sure there are older systems out there that do not have a choice, so how are they configured?
The point to this exercise in futility was to see if perhaps the old Adaptec card would respond to a rescan if it was on a lower (recognizable) IRQ. It's currently on IRQ 22!