Technical Reference Guide
Compaq Personal Computers
Original - December 2000
L-3
L.3
SCSI ADAPTER PROGRAMMING
L.3.1 SCSI ADAPTER CONFIGURATION
The Adaptec SCSI Host Adapter Card is a PCI device and configured using PCI protocol and PCI
Configuration Space registers (PCI addresses 00h-FFh) as discussed in Chapter 4 of this guide.
Configuration is accomplished by BIOS during POST and re-configurable with software. The
vender ID and device ID for the adapter are as follows:
Vender ID (PCI config. addr. 00h): 9005h
Device ID (PCI config, addr. 02h): 0080h
L.3.2 SCSI ADAPTER CONTROL
Control of the SCSI host adapter is affected through I/O mapped registers mapped as listed in
Table L-1.
Table L–1.
SCSI Host Adapter Card Control Register Mapping
Table L-1.
Ultra SCSI Host Adapter Card
Control Register Mapping
I/O Addr.
Function
n00h-n1Fh
SCSI Register Array
n20h-n5Fh
Scratch RAM
n60h-n7Fh
Phase Engine (Sequencer)
n80h-n9Fh
Host Registers
n00h-nFFh
SCB Array
n = prefix address supplied by the BASEADR0 PCI Config. Reg.
L.4 SPECIFICATIONS
The operating specifications are listed in Table L-2.
Table L–2.
Ultra SCSI Host Adapter Card Specifications
Table L-2.
Ultra SCSI Host Adapter Card Specifications
Operating Voltage
+5 VDC
Maximum Current Draw
2 A
Operating Temperature
32
°
F (0
°
C) to 131
°
F (55
°
C)
Содержание Deskpro EXS
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