NAME

mgnsc — Magnum low level SCSI interface

SYNOPSIS

mgnsc0 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 mgnsc, which then handles the hardware specific issues.

The mgnsc 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 mgnsc uses is based on the NCR53c710 SCSI chip.

DIAGNOSTICS

mgnsc%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 mgnsc interface first appeared in NetBSD 1.0