M-AUDIO DMAN - Manual (Page 43)

43
Troubleshooting
This section addresses potential problems that can occur in all
operating system environments, with emphasis on hardware
troubleshooting. Within the PC environment there is a limited
number of hardware resources (addresses, IRQs, and DMA
channels) available for use. Since audio cards require many
resources, most audio card installation problems arise from
improperly set IRQ and DMA values. The tables below list the
IRQ and DMA channel assignments normally used in the PC
environment. When you experience problems that indicate a
resource conflict, you can compare the IRQ and DMA channels
shown in the tables below with your current parameters, as listed
in the Configuration screen.
Typical IRQ Assignments
Interrupt IBM PC Assigns This Interrupt To:
IRQ2/9 Available
IRQ3 COM2: Second Serial Port
IRQ4 COM1: First Serial Port
IRQ5 LPT2: Second Parallel Printer Port, usually
available
IRQ6 Floppy Disk Controller
IRQ7 LPT1: 1st Parallel Printer Port, usually available
IRQ8 Real Time Clock
IRQ10 Available
IRQ11 Available
IRQ12 Pointing Device (PS/2 or bus type Mouse)
IRQ13 Math Co-processor
IRQ14 Hard Disk Controller
IRQ15 Second Hard Disk Controller, usually available