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
NetBSD1.0