
APPENDIX A: Server Specifications
Address Range (hex) | Amount | Function |
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0E0000h to 0EFFFFh | 2 MB | Extended system BIOS |
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FC000000h to FFFFFFFFh | 64 MB | PCI memory space |
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Interrupts
Important
If you disable an IDE controller to free the interrupt for that controller, you must physically unplug the IDE cable from the system board. Simply disabling the drive by configuring the BIOS option does not make the interrupt available.
The following table reflects a typical configuration, but you can change these interrupts. Use this information to determine how to program each interrupt.
ISA Interrupt | Description |
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IRQ0 | 8254 timer |
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IRQ1 | Keyboard controller |
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IRQ2 | Cascade for IRQ9 |
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IRQ3 | Free |
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IRQ4 | Serial port |
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IRQ5 | VGA |
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IRQ6 | Diskette controller |
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IRQ7 | Free |
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IRQ8 | |
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IRQ9 | Generic, Option for SCI |
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IRQ10 | USB controller |
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IRQ11 | LAN |
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IRQ12 | Mouse controller |
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IRQ13 | Numeric data processor |
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IRQ14 | Primary IDE controller |
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IRQ15 | Free |
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Connector pinouts
Main power connector (J48)
Pin | Signal Name |
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1+3.3 V
2+3.3 V
3 Ground
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