Compaq Armada m300 Compaq Armada M300 Series of Personal Computers Maintenance - Page 96

System Interrupts, System DMA, Table 6-10

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6.8 System Interrupts Table 6-10 System Interrupts Hardware IRQ System Function IRQ1 Timer Interrupt IRQ2 Cascaded IRQ3 PCMCIA IRQ4 COM1 IRQ5 Audio (default)* IRQ6 Diskette drive IRQ7 Parallel IRQ8 RTC IRQ9 Infrared IRQ10 PCMCIA IRQ12 Internal Point Stick or External Mouse IRQ13 Coprocessor (Not available to any peripheral) IRQ14 IDE Interface (Hard Disk) Notes: 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. *Default configuration; audio possible configurations are: IRQ5, IRQ7, IRQ9, IRQ10, or none. 6.9 System DMA Table 6-11 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 = DMA0, 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. Specifications 6-7

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Specifications
6-7
6.8
System Interrupts
Table 6-10
System Interrupts
Hardware IRQ
System Function
IRQ1
Timer Interrupt
IRQ2
Cascaded
IRQ3
PCMCIA
IRQ4
COM1
IRQ5
Audio (default)*
IRQ6
Diskette drive
IRQ7
Parallel
IRQ8
RTC
IRQ9
Infrared
IRQ10
PCMCIA
IRQ12
Internal Point Stick or External Mouse
IRQ13
Coprocessor (Not available to any peripheral)
IRQ14
IDE Interface (Hard Disk)
Notes:
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.
*
Default configuration; audio possible configurations are: IRQ5, IRQ7, IRQ9, IRQ10, or none.
6.9
System DMA
Table 6-11
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 = DMA0, 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.