CYC(3)							     Library Functions Manual							    CYC(3)

NAME

       cyc - Cyclone fiber interface

SYNOPSIS

       bind #C /dev

       /dev/cyc

DESCRIPTION

       The  cyc  device  drives  the Cyclone CVME961 (not 960) card with an attached SQFBR Squall module to provide a high-speed point-to-point 9P
       link between a CPU server and a file server.  Both machines must of course have VME buses.  For debugging, the Cyclone may be  loaded  with
       on-board  software  using xms (see con(1)) and the NINDY ROM supplied with the device.  In production, though, it is easiest to replace the
       ROM with the program in the directory /sys/src/fs/cyc.  In either case, the on-board software expects an identical Cyclone  to  be  at  the
       other  end  of  the  fiber.   One of the boards must be in a CPU server, the other in a file server; the systems configure their respective
       boards dynamically as appropriate.

       The driver serves a single file, /dev/cyc.  When opened, the file initializes the connection  to  the  file  server.   The  resulting  file
       descriptor  should be used only to send and receive 9P messages.  Typically boot(8) will open /dev/cyc, prime the connection by sending nop
       and session messages (see attach(5)), and then mount (see bind(2)) the file descriptor in the CPU server's  name  space.   Thenceforth  all
       activity on /dev/cyc will be mediated by the mount driver mnt(3)).

FILES

       /sys/src/fs/cyc
	      Directory of on-board software for the Cyclone.

SEE ALSO

       CVME960, CVM961 Single Board Computer User's Manual and SQFBR User's Manual, Cyclone Microsystems, Inc., New Haven, CT, 1-203-7865536

SOURCE

       /sys/src/9/power/devcyc.c

BUGS

       The driver is specific to the SGI Power Series, although the device should operate on any VME bus.

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