*nix Documentation Project
·  Home
 +   man pages
·  Linux HOWTOs
·  FreeBSD Tips
·  *niX Forums

  man pages->OpenBSD man pages -> hppa/gsc (4)              



NAME    [Toc]    [Back]

     gsc - General System Connect bus on HP 9000/700 machines

SYNOPSIS    [Toc]    [Back]

     gsc* at lasi?
     gsc* at asp?
     gsc* at wax?

DESCRIPTION    [Toc]    [Back]

     This is the core I/O bus for all HP  9000/700  workstations.
All I/O subsystems
  connect  to this bus.  The devices can be either on
     chips, expansion cards or on an  integrated  megacell,  like

     The  GSC  bus is a 32-bit wide, address and data multiplexed
bus.  In its
     "standard" implementation it has  a  maximum  throughput  of
160MB/s, the
     "2x"  implementation  reaches up to 250MB/s.  Some HPPA CPUs
directly attach
 to this bus, namely the PA7100LC and PA7300LC.

     As for the expansion cards, there  are  different  form-factors, depending
     on  bus-speed  (standard  or  2x)  and specific models.  The
standard formfactor
 is the "EISA form-factor"; cards that look like  typical
EISA cards
     with  a  different connector (100-pin female EBBL).  The Series 712 have
     their own special type of GSC expansion  cards,  called  the
"GIO form-factor",
 which is quite small and mostly has only one VLSI chip
on it (in
     most cases LASI/WAX).  Newer systems sometimes  feature  the
"HSC formfactor",
  which  is  a  1U-VME  card-like expansion card with a
100-pin male
     pin+socket connector.  Mixing cards with different speeds is
     but downgrades the performance of the whole I/O-subsystem.

SUPPORTED DEVICES    [Toc]    [Back]

     The system includes machine-dependent GSC drivers, sorted by
driver name:

           com(4)        RS-232 ports.
           gsckbc(4)     PC-style keyboard controller.
           harmony(4)    CS4215/AD1849 audio.
           hil(4)        Human Interface Loop, for HP-proprietary
input devices
 like keyboard and mice.
           ie(4)          Intel i82596 DX/CA 32-bit LAN coprocessor.
           lpt(4)        Centronics printer port.
           oosiop(4)     Symbios/NCR 53C700 SCSI I/O Processor.
           osiop(4)      Symbios/NCR 53C710 SCSI I/O Processor.

     Some of these GSC devices also have PCI, EISA, or ISA equivalents.  These
     are listed in pci(4), eisa(4), or isa(4),

SEE ALSO    [Toc]    [Back]

     asp(4), cpu(4), intro(4), lasi(4), wax(4)

HISTORY    [Toc]    [Back]

     The gsc driver appeared in OpenBSD 2.6.

OpenBSD      3.6                           April      4,     1999
[ Back ]
 Similar pages
Name OS Title
asp OpenBSD core bus controller as present on older HP 9000/700 machines
ie OpenBSD Intel i82596 DX/CA LAN coprocessor as found in HP 9000/700 machines
cu FreeBSD connect to a remote system
cu OpenBSD connect to a remote system
tip FreeBSD connect to a remote system
tip OpenBSD connect to a remote system
frodo OpenBSD HP 9000/4xx Frodo ASIC
big5udf HP-UX HP 9000 Big5 code UDF utilities
ccdcudf HP-UX HP 9000 CCDC code UDF utilities
dce_version HP-UX print version information for HP DCE/9000 components
Copyright © 2004-2005 DeniX Solutions SRL
newsletter delivery service