wesc
—
Warp Engine low level SCSI interface
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
wesc
, which then handles the hardware specific issues.
The wesc
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 wesc
uses is based
on the NCR53c710 SCSI chip.
The wesc
interface supports the following Zorro III
expansion cards:
- WARP ENGINE
- MacroSystem Development Warp Engine internal SCSI,
manufacturer 2203, product 19
- wesc%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.
The wesc
interface first appeared in
NetBSD 1.0