NAME

ncr810 − NCR 53C810/820/825 SCSI I/O Processors (SIOPs)

DESCRIPTION

The ncr810 driver provides low-level interface routines between the High Perfomance Device Driver (see hpdd(7)) and the NCR 53C810, NCR 53C820, or NCR 53C825 SIOPs.  The NCR 53C810/820/825 must be the sole initiator on a SCSI bus.  The ncr810 driver currently does not support Logical Unit Numbers (LUNs).  Therefore, only seven SCSI devices can be attached to the NCR 53C810/820/825 SIOP at one time (target ID 0 through target ID 6).  SCSI target ID 7 is used by the NCR 53C810/820/825 SIOPs. 

IRQ 11, 10, 14, and 15 can be used by the ncr810 driver.  The ncr810 driver reads PCI configuration space to find the SIOP’s I/O port address and automatically configures itself to the IRQ set on the SIOP by reading the SIOP’s Interrupt Line field of the PCI configuration space. 

NOTES:

  The ncr810 driver is a multi-threaded driver. 

  On some PCI-EISA systems, the EISA configuration utility must be run to enable the on-board PCI NCR 53C810 SCSI ­processor. If the on-board NCR 53C810 is disabled when the systsem is booted, the ncr810 driver will not detect the on-board NCR 53C810 SCSI processor. 

SEE ALSO

aha1520(7), aha1540(7), aha1740(7), athd(7), bt742(7), disk(7), escx(7), hpdd(7), ida(7), mcesdi(7), mcst(7), ncr700(7), ncr710(7), pci(7), tape(7), tmc8x0(7), wdasc(7), wdex(7). 

ADDED VALUE

This entry, supplied by SunSoft, Inc., is an extension of UNIX System V. 
 
 
 
 
 
 
 

\*U  —  Version 1.0