AFSC(4)

NAME
afsc - A4091 low level SCSI interface

SYNOPSIS
afsc0 at zbus0

DESCRIPTION
The Amiga architecture uses a common machine independent scsi sub-system provided in the kernel source. The machine independent drivers that use this code access the hardware through a common interface. (see scsibus(4)) This common interface interacts with a machine dependent interface, such as afsc, which then handles the hardware specific issues.

The afsc interface handles things such as DMA and interrupts as well as actually sending commands, negotiating synchronous or asynchronous transfers and handling disconnect/reconnect of SCSI targets. The hardware that afsc uses is based on the NCR53c710 SCSI chip.

HARDWARE
The afsc interface supports the following Zorro III expansion cards:

A4091
    Commodore SCSI adapter, manufacturer 514, product 84

DIAGNOSTICS

afsc%s: abort %s: dstat %02x, sstat0 %02x sbcl %02x The scsi operation %s was aborted due to error. Dstat, sstat and sbcl are registers within the NCR53c710 SCSI chip.

siop id %d reset The NCR53c710 SCSI chip has been reset and configure at id %d.

SIOP interrupt: %x sts %x msg %x sbcl %x The NCR53c710 SCSI chip has interrupted unexpectedly.

SIOP: SCSI Gross Error The NCR53c710 SCSI chip has indicated that it is confused.

SIOP: Parity Error The NCR53c710 SCSI chip has indicated that it has detected a parity error on the SCSI bus.

SEE ALSO
scsibus(4)

HISTORY
The afsc interface first appeared in NetBSD 1.0