Compaq Armada V300 Compaq Armada E500 and Armada V300 Maintenance and Service - Page 143

Table 6-15, System DMA, System Interrupts, Hardware DMA, System Function

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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

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Specifications
6
-
11
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.