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OWNER’S HANDBOOK
A/4 Appendix
Priority IRQ Cause of interrupt
14 IRQ4 Serial port @ 3F8h (factory default)
15 IRQ5 Audio (factory default)
16 IRQ6 Diskette drive controller
17 IRQ7 Parallel port @ 378h (factory default)
DMA channels
The parallel port in ECP mode requires either DMA1, DMA2 or DMA3. The infrared port in IrDA 1.1 Fast
Infrared (FIR) mode requires either DMA1 or DMA3.
DMA requirements mean that the Pedion cannot use the diskette drive and the FIR, ECP and audio features at
the same time. If necessary, you can use the BIOS Setup utility to disable the diskette drive and free DMA2. The
audio system requires DMA1 and DMA3 and cannot be disabled.
Channel Function
1Audio
2 Diskette drive
3Audio
4 DMA controller