TC(4)                 OpenBSD Programmer's Manual (PMAX)                 TC(4)

NAME
     tc - TurboChannel SCSI adaptor

SYNOPSIS
     tc? at mainbus

DESCRIPTION
     The tc driver provides support for the DEC TurboChannel expansion bus on
     DECstation 5000 series machines. TurboChannel is a 32-bit wide syn-
     chronous DMA-capable bus, running at 25 Mhz on higher-end machines and at
     12.5MHz on lower-end machines.

SEE ALSO
     asc(4), cfb(4), intro(4), ioasic(4), le(4), mfb(4), px(4), sfb(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 se-
     ries.

OpenBSD 2.9                     August 6, 1996                               1
