NetBSD/share/man/man4/man4.pmax/tc.4

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.\"
.\" Copyright (c) 1996 Jonathan Stone.
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.\" $Id: tc.4,v 1.1 1996/08/11 02:29:26 jonathan Exp $
.\"
.Dd August 6, 1996
.Dt TC 4 pmax
.Os NetBSD 1.2
.Sh NAME
.Nm tc
.Nd
turbochannel SCSI adaptor
.Sh SYNOPSIS
.Cd "tc? at ioasic?"
.Sh DESCRIPTION
The
.Nm
driver provies support for the DEC TURBOchannel expansion
bus on Decstation 5000 series machines. Turbochannel is a 32-bit wide
synchronous DMA-capable bus, running at 25 Mhz on higher-end machines
and at 12.5MHz on lower-end machines.
.Nm
.Sh SEE ALSO
.Xr intro 4 ,
.Xr asc 4 ,
.Xr le 4 ,
.Xr cfb 4 ,
.Xr sfb 4 ,
.Xr mfb 4 ,
.Sh HISTORY
The
.Nm
driver
first appeared in
.Nx 1.1 .
.Sh BUGS
The Decstation 5000/200 does not actually have an
.Nm ioasic
chip, but for consistency it must be configured as if it
did.
The
.Nm
driver makes poor use of interrupt priority on the 5000/1xx
series.