IBM Low Power 667Mhz Panel PC PPC-1510PT User Manual page 22

An IRQ number is automatically assigned to PCI expansion cards after those used by Legacy and PnP ISA cards. In
the PCI Bus design, the BIOS is automatically assigned an IRQ to a PCI slot that has a card in it which requires an IRQ.
To install a PCI card, you need to set the correct "ADSEL" and "INT" (interrupt) assignment. Please refer to "Chapter
2-5" Installing a Riser Card for detail assignments.
IRQ Status
0 Used
1 Used
2 Used
3 Used
4 Used
5 Used
6 Used
7 Used
8 Used
9 Used
10 Used
11 Used
12 Used
13 Used
14 Used
15 Used
2-8. Assigning DMA Channels for ISA Cards
Since ISA cards, both Legacy and PnP may also need to use a DMA (direct memory access) channel, DMA
assignments for this motherboard are handled the same way as the IRQ assignment process described above. You
can select a DMA channel in the PCI and PnP configuration section of the BIOS setup utility. In the BIOS setup, you
should choose "Yes" for those IRQ's and DMA's you wish to reserve for Legacy cards.
Assignment
Timer
Keyboard
Second 8259
COM2
COM1
COM3
Floppy Disk
LPT1
RTC
LPT2 or Audio
COM4
LAN Adapter (on board)
PS/2 Mouse
Coprocessor
Hard Disk (IDE 1)
Reserved (IDE 2)
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