Compaq E500S, V300 manual System DMA, Hardware DMA System Function, System Interrupts

	Table 6-15
	System DMA
Hardware DMA	System Function
DMA0	Available for audio
DMA1	Entertainment Audio (default; alternate = DMA0, DMA3,
	None)
DMA2	Diskette drive
DMA3	ECP parallel port LPT1 (default; alternate = DMA 0, none)
DMA4	DMA controller cascading (not available)
DMA5	Available for PC Card
DMA6	Not assigned
DMA7	Not assigned
NOTE: PC Card controller can use DMA 1, 2, or 5.
	Table 6-16
	System Interrupts
Hardware DMA	System Function
IRQ0	System timer
IRQ1	Keyboard controller
IRQ2	Cascaded
IRQ3	COM2
IRQ4	COM1
IRQ5	Audio (default)*
IRQ6	Diskette drive
IRQ7	Parallel port
IRQ8	Real time clock (RTC)
IRQ9	Infrared
IRQ10	System use
IRQ11	System use
IRQ12	Internal point stick or external mouse
IRQ13	Coprocessor (not available to any peripheral)
IRQ14	IDE interface (hard disk and CD-ROM drive)
IRQ15	Fixed disk drives on the expansion base or convenience
	base

*Default configuration; audio possible configurations are: IRQ5, IRQ7, IRQ9, IRQ10, or none.

NOTE: PCMCIA cards may assert IRQ3, IRQ4, IRQ5, IRQ7, IRQ9, IRQ10, IRQ11, or IRQ15. Either the infrared or the serial port may assert IRQ3 or IRQ4.

Specifications 6-11