AlphaServer 8400
Optional Controller Configuration Table
With multiple adapters that provide the same interface available on different I/O buses (PCI or XMI), it is possible to exceed operating system limit on number of ports supported for that interface. Follow these guidelines for maximum number of ports that each operating system will support. Fill in table under the relevant area, add up the number of controllers/ports available, and verify the operating system limits will not be exceeded. Do not exceed these values.
| A | B | C | DIGITAL |
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| Number | Number | Total |
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| of | of | Ports | UNIX | OpenVMS |
Option Name | Ports/Buses | Options | (A * B) | Limit | Limit |
SCSI Options |
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Included | 4 | 1 | 4 |
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SCSI ports* |
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Additional | 4 |
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FWD SCSI ports |
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1 |
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2 |
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Add column “C”— must be less than or equal to value listed under |
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| 32 | 26 |
operating system to be used. |
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802.3/Ethernet Options |
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Included | 2 | 1 | 2 |
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Additional | 2 |
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1 |
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1 |
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Add column “C”— must be less than or equal to value listed under |
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| 8 | 8 |
operating system to be used. |
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FDDI Options |
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Included | 1 |
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installed |
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Additional | 1 |
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installed |
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1 |
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1 |
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Add column “C”— must be less than or equal to value listed under |
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| 8 | 8 |
operating system to be used. |
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EISA Bus IRQ Address Table
Configuration Rules and Information
EISA Bus IRQ address assignments are for DIGITAL UNIX and OpenVMS systems only.
In some cases, the maximum number of each supported device is less than the number of EISA bus addresses available; this is due to other limitations.
Only one device can occupy any given IRQ address; if multiples of a device are configured, each device occupies separate address.
Match each device to one available address. (Note: With the table as a worksheet, fill in “0” for each device; fill in only one “0” per column.)
Actual IRQ address assignment will be made by the EISA Configuration Utility (ECU), which is run during system manufacture, or in the installed system if the EISA bus is reconfigured.
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| EISA Bus IRQ Addresses |
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| Maximum of Each Supported | |||||
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Option | 5 | 7 | 8 |
| 9 | 10 | 11 |
| 12 | 14 | 15 | OpenVMS | DIGITAL UNIX |
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– | – | 0 |
| 0 | 0 | 0 |
| 0 | 0 | 0 | 1 | 2 | |
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0 | – | – |
| 0 | 0 | 0 |
| – | – | 0 | 1 | 1 | |
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| NA | NA | NA |
| NA | NA | NA |
| NA | NA | NA | 1 | 1 |
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| NA | NA | NA |
| NA | NA | NA |
| NA | NA | NA | 1 | 1 |
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Table Codes: |
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0 = address is available for device, | – = address not available for device | NA = Not Applicable |
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Alpha Servers 3.227