tcds
—
TURBOchannel dual-channel SCSI adapters
tcds* at tc? slot ? offset ?
The tcds
driver provides support for the DEC
TURBOchannel PMAZ-DS, PMAZ-FS, PMAZB-AA and PMAZC-AA dual-channel SCSI
adapters. Each channel is driven by the
asc(4) driver. The PMAZ-FS (Alpha
onboard only) and PMAZC-AA (option board) provide two Fast Narrow SCSI busses,
while the PMAX-DS (Alpha onboard only) and PMAZB-AA only provide Narrow SCSI.
For the onboard Alpha controllers, one bus is for internal devices and one bus
for external devices.