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AlphaServer 1200 (6 PCI slots)
In addition to 6 PCI vacant slots there are 2 PCI positions occupied by on-board devices. All 8 PCI positions are listed in the following table in the order in which Alpha SRM console enumerates them.
| Slot | pci_<N> | device | function | irq | Description |
|---|---|---|---|---|---|
| - | 1 | 1 | 0 | 4 | NCR 53C810 PCI SCSI Adapter |
| 0 | 1 | 2 | 0 | 6 | <option> |
| 1 | 1 | 3 | 0 | 12 | <option> |
| 2 | 1 | 4 | 0 | 16 | <option> |
| - | 0 | 1 | 0 | - | Intel i82375 PCI EISA Bridge (MERCURY) |
| 3 | 0 | 2 | 0 | 8 | <option> |
| 4 | 0 | 3 | 0 | 12 | <option> |
| 5 | 0 | 4 | 0 | 16 | <option> |
So far, the CHARON-AXP emulators do not emulate NCR 53C810 PCI SCSI adapter. Instead, emulation of QLOGIC ISP1040B PCI SCSI adapter is used.
AlphaServer 2000 (3 PCI slots)
In addition to 3 PCI vacant slots there are 3 PCI positions occupied by on-board devices. All 6 PCI positions are listed in the following table in the order in which Alpha SRM console enumerates them.
| Slot | pci_<N> | device | function | irq | Description |
|---|---|---|---|---|---|
| - | 0 | 0 | 0 | 2 | DEC TULIP PCI Ethernet adapter |
| - | 0 | 1 | 0 | 1 | NCR 53C810 PCI SCSI Adapter |
| - | 0 | 2 | 0 | - | Intel i82375 PCI EISA Bridge (MERCURY) |
| 0 | 0 | 6 | 0 | 0 | <option> |
| 1 | 0 | 7 | 0 | 4 | <option> |
| 2 | 0 | 8 | 0 | 5 | <option> |
The IRQ stands for input line of T2 resident cascade of Intel i8259 interrupt controllers. It has nothing to do with “EISA” style interrupts.
So far the CHARON-AXP emulators do not support virtual NCR 53C810 PCI SCSI adapter. Instead, virtual QLOGIC ISP1040B PCI SCSI adapter is used.
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