HP G70-100 HP G70 Notebook PC Compaq Presario CQ70 Notebook PC - Maintenance a - Page 90
System DMA specifications, System interrupt specifications
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Specifications System DMA specifications Hardware DMA System function DMA0 Not applicable DMA1* Not applicable DMA2* Not applicable DMA3 Not applicable DMA4 Direct memory access controller DMA5* Available for PC Card DMA6 Not assigned DMA7 Not assigned *PC Card controller can use DMA 1, 2, or 5. System interrupt specifications Hardware IRQ System function IRQ0 System timer IRQ1 Standard 101-/102-Key or Microsoft Natural Keyboard IRQ2 Cascaded IRQ4 COM1 IRQ6 Diskette drive IRQ7* Parallel port IRQ8 System CMOS/real-time clock IRQ9* Microsoft ACPI-compliant system IRQ12 Synaptics PS/2 TouchPad IRQ13 Numeric data processor IRQ14 Primary IDE channel IRQ15 Secondary IDE channel *Default configuration; audio possible configurations are IRQ5, IRQ7, IRQ9, IRQ10, or none. ✎ PC Cards may assert IRQ3, IRQ4, IRQ5, IRQ7, IRQ9, IRQ10, IRQ11, or IRQ15. Either the infrared or the serial port may assert IRQ3 or IRQ4. 6-6 Maintenance and Service Guide