NAME

aha1540 − low-level controller module

DESCRIPTION

The aha1540 module provides low-level interface routines between the High Performance Device Driver (see hpdd(7)) and the Adaptec AHA-1540, AHA-154XA, and AHA-1640 Small Computer System Interface (SCSI) Host Adapters.  It can be configured for disk or streaming tape support for one or more host adapter boards, each of which must be the sole initiator on a SCSI bus.  The low-level code determines if the adapter is, in fact, present at the configured address (see disk(7) and tape(7)) and what types of devices are attached to it. It handles simultaneous requests for all devices, overlapping operations where the devices will permit. The aha1540 driver implements the SCSI passthrough operation. 

For information on configuring a kernel to include the aha1540 module, refer to the INTERACTIVE UNIX System Maintenance Guide.

Board Configuration

The default configurations described in the Adaptec AHA-1540/1542 User’s Manual or Adaptec AHA-1640 User’s Manual should be used for standard configurations of the system.  If more than one board is to be used in a single system, each must at least occupy a different set of I/O address ranges and use a different DMA channel.  Use of a different interrupt level for each board is encouraged, although not required. 

SEE ALSO

aha1520(7), aha1740(7), athd(7), bt742(7), disk(7), dpt20xx(7), greater16(7), hpdd(7), ida(7), mcesdi(7), mcst(7), passthru(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