TC(4) | Device Drivers Manual | TC(4)

# NAME

`tc` —
TURBOchannel expansion bus driver

# SYNOPSIS

## alpha

`tc* at tcasic?`

## pmax

`tc* at mainbus0`

## vax

`tc0 at vsbus0`

# DESCRIPTION

The `tc` driver provides machine-independent support for the DEC TURBOchannel expansion bus found on all DEC 5000-series machines with MIPS, DEC 3000-series with Alpha processors and VAXstation 4000 machines with the optional TURBOchannel adaptor.

Your system may support additional TURBOchannel devices. Drivers for TURBOchannel devices not listed here are machine-dependent. Consult your system's intro(4) for additional information.

# HARDWARE

NetBSD includes machine-independent TURBOchannel drivers, sorted by device type and driver name:

## SCSI interfaces

asc
  PMAZ-A single-channel SCSI adapter
tcds
  PMAZ-DS, PMAZ-FS, PMAZB-AA and PMAZC-AA dual-channel SCSI adapters

## Network interfaces

fta
  PMAF-F DEFTA FDDI controller
le
  LANCE Ethernet interface

## Frame buffers

cfb
  PMAG-B CX colour unaccelerated 2-D framebuffer
mfb
  PMAG-A MX monochrome framebuffer
px
  PMAG-C PX accelerated graphics boards
pxg
  PMAG-D, PMAG-E and PMAG-F PXG accelerated graphics boards
sfb
  PMAGB-BA HX colour unaccelerated 2-D framebuffer
tfb
  PMAG-J TX 24-bit colour unaccelerated 2-D framebuffer

## Miscellaneous

ioasic
  baseboard IO control ASIC for DEC TURBOchannel systems
tcu
  TC-USB USB host and GPIO option

# SEE ALSO

asc(4), cfb(4), fta(4), intro(4), ioasic(4), le(4), mfb(4), px(4), pxg(4), sfb(4), tcds(4), tcu(4), tfb(4)

# HISTORY

The `tc` driver first appeared in NetBSD 1.1.

# BUGS

The `tc` driver makes poor use of interrupt priority on the 5000/1xx series systems.

June 23, 2017 | NetBSD 9.4