119 lines
3.6 KiB
Groff
119 lines
3.6 KiB
Groff
.\" $NetBSD: gsc.4,v 1.1 2004/09/22 16:38:26 jkunz Exp $
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.\"
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.\" $OpenBSD: gsc.4,v 1.18 2004/03/12 00:04:56 miod Exp $
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.\"
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.\"
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.\" Copyright (c) 1999 Michael Shalayeff
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.\" All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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.\"
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.Dd April 4, 1999
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.Dt GSC 4 hp700
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.Os
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.Sh NAME
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.Nm gsc
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.Nd General System Connect bus on
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.Tn HP 9000/700
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machines
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.Sh SYNOPSIS
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.Cd "gsc* at lasi?"
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.Cd "gsc* at asp?"
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.Cd "gsc* at wax?"
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.Sh DESCRIPTION
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This is the core I/O bus for all HP 9000/700 workstations.
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All I/O subsystems connect to this bus.
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The devices can be either on separate chips, expansion
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cards or on an integrated megacell, like the LASI MBA.
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.Pp
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The
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.Tn GSC
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bus is a 32-bit wide, address and data multiplexed bus.
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In its "standard" implementation it has a maximum throughput of 160MB/s,
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the "2x" implementation reaches up to 250MB/s.
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Some HPPA CPUs directly attach to this bus, namely the PA7100LC and PA7300LC.
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.Pp
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As for the expansion cards, there are different form-factors, depending on
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bus-speed (standard or 2x) and specific models.
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The standard formfactor is the "EISA form-factor"; cards that look like
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typical EISA cards with a different connector (100-pin female EBBL).
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The Series 712 have their own special type
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of GSC expansion cards, called the "GIO form-factor", which is quite small and
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mostly has only one VLSI chip on it (in most cases LASI/WAX).
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Newer systems sometimes feature the "HSC formfactor", which is a 1U-VME
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card-like expansion card with a 100-pin male pin+socket connector.
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Mixing cards with different speeds is supported but downgrades
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the performance of the whole I/O-subsystem.
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.Sh SUPPORTED DEVICES
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The system includes machine-dependent
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.Tn GSC
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drivers, sorted by driver name:
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.Pp
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.Bl -tag -width 12n -offset indent -compact
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.It Xr com 4
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RS-232 ports.
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.It Xr gsckbc 4
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PC-style keyboard controller.
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.It Xr harmony 4
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CS4215/AD1849 audio.
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.It Xr hil 4
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Human Interface Loop, for HP-proprietary input devices like keyboard and mice.
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.It Xr iee 4
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Intel i82596 DX/CA 32-bit LAN coprocessor.
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.It Xr lpt 4
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Centronics printer port.
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.It Xr oosiop 4
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.Tn Symbios/NCR
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53C700 SCSI I/O Processor.
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.It Xr osiop 4
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.Tn Symbios/NCR
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53C710 SCSI I/O Processor.
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.El
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.Pp
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Some of these
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.Tn GSC
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devices also have
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.Tn PCI ,
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.Tn EISA ,
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or
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.Tn ISA
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equivalents.
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These are listed in
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.Xr pci 4 ,
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.Xr eisa 4 ,
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or
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.Xr isa 4 ,
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.Sh SEE ALSO
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.Xr asp 4 ,
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.Xr cpu 4 ,
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.Xr intro 4 ,
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.Xr lasi 4 ,
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.Xr wax 4
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.Sh HISTORY
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The
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.Nm
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driver
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appeared in
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.Ox 2.6 .
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It was ported to
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.Nx 1.6
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by Matthew Fredette.
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