Compaq EP Series manual 4 I/O, Hardware DMA System Function

6.1.3	DMA
	Hardware DMA	System Function
	DMA 0	Unused
	DMA 1	Audio (Alternate = DMA 0 or 3)
	DMA 2	Diskette Drive
	DMA 3	ECP Parallel Port LPT1 (Default; Alternate = DMA 0)
	DMA 4	DMA Controller Cascading (Not on ISA Bus)
	DMA 5	Unused
	DMA 6	Unused
	DMA 7	Unused

6.1.4I/O

I/O Address (Hex)		System Function (Shipping Configuration)
000 - 00F		DMA Controller # 1
010	- 01F	Unused
020 - 03F		Interrupt Controller # 1
040 - 043		Counter/Timer
044	- 05F	Unused
060		Keyboard Controller
061		Port B
062 - 063		Unused
064		Keyboard Controller
065	- 06F	Unused
070 - 071		NMI Enable/Real-Time Clock
072	- 077	CMOS Storage
078	- 07F	Unused
080 - 08F		DMA Page Registers
090 - 091		Unused
092		Port A
093	- 09F	Unused
0A0 - 0BF		Interrupt Controller # 2
0C0 - 0DF		DMA Controller # 2
0E0 - 0EB		Unused
0EC - 0ED		483 Configuration Index/Data
0EE - 0EF		483 Fast A20/Fast Reset
0F0 - 0F1		Co-Processor Busy Clear/Reset
0F2 - 0F3		Unused
0F4 - 0F5		483 CPU Speed Slow/Fast
0F6 - 0F8		Unused
0F9		483/PGL Configuration Lock

Continued

Compaq Deskpro EP Series of Personal Computers 6-3