September 12, 2001 TC 4

### NAME

tc - TURBOchannel expansion bus driver

### SYNOPSIS

#### alpha

tc* at tcasic?

#### pmax

tc* at mainbus0

### DESCRIPTION

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

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

### SEE ALSO

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

### HISTORY

The tc driver first appeared in NetBSD1.1.

### BUGS

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