AHSC(4) | Device Drivers Manual (amiga) | AHSC(4) |
ahsc
— A3000 low
level SCSI interface
ahsc0 at mainbus0
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
ahsc
, which then handles the hardware specific
issues.
The ahsc
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 ahsc
uses is based
on the WD33c93 SCSI chip.
The ahsc
interface first appeared in
NetBSD 1.0
August 31, 1994 | NetBSD 10.99 |