IBASE SI-38N - Manual (Page 47)

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0070h-0073h System CMOS/real time clock
0074h-007Fh Motherboard resources
0080h-0090h Direct memory access controller
0091h-0093h Motherboard resources
0094h-009Fh Direct memory access controller
00A0h-00A1h Programmable interrupt controller
00A2h-00BFh Motherboard resources
00C0h-00DFh Direct memory access controller
00E0h-00EFh Motherboard resources
00F0h-00FFh Numeric data processor
0170h-0177h Secondary IDE Channel
01F0h-01F7h Primary IDE Channel
0274h-0277h ISAPNP Read Data Port
0279h-0279h ISAPNP Read Data Port
03F8H-03FFFh Communications Port (COM1)
B. Interrupt Request Lines (IRQ)
Peripheral devices use interrupt request lines to notify CPU for the service required.
The following table shows the IRQ used by the devices on board.