IRQS- Interrupt Request Line

0      0040-005F     System Timer
1      0060-006F     Keyboard controller
2      00A0-00AF   Access to IRQ's 7 and above
3      02F8-02FF    Com 2
3      02E8-02EE    Com 4
4      03F8-03FF    Com 1
4      03E8-03EF    Com 3
5      0278-027F     LPT 2 or Soundcard
6      03F0-03F7     Floppy
7      0378-037F     LPT 1
8      0070-007F     Real Time Clock
9                           Available
10                         Available
11                         Available or SCSI
12    0238-023F     PS/2 Mouse
13    00F8-00FF     Math coprocessor
14    01F0-01F7     IDE Hard Drive
15    0170-017F      Secondary IDE Hard Drive Available
DMA Channels

      8 bit transfer data            Faster 16 bit transfer data
0  1  2  3    4  5  6  7

DMA Channel 4 is not avialable for data transfer because it cascades down into the lower four DMA channels.

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