Mitsubishi Electric Pedion Owner's Handbook Manual page 85

OWNER'S HANDBOOK
Priority
14
15
16
17
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
1
2
3
4
A / 4 A p p e n d i x
IRQ Cause of interrupt
IRQ4 Serial port @ 3F8h (factory default)
IRQ5 Audio (factory default)
IRQ6 Diskette drive controller
IRQ7 Parallel port @ 378h (factory default)
Function
Audio
Diskette drive
Audio
DMA controller