gse(7)

NAME
     gse - Silicon Graphics 5080 workstation interface card

DESCRIPTION
     The special file /dev/gse provides access to the Silicon Graphics 5080
     workstation interface card, which connects a Silicon Graphics 4D system
     to a Channel Controller attached to an IBM mainframe.  The connection of
     the interface card can be coaxial, V.35, or T1.

     This special file is used by the IBM 5080 emulator (em5080(1)).  The
     following control functions are provided by the driver to the emulator
     via ioctl(2).

         #include <sys/gseio.h>
         struct gse_io gseio;

         ioctl(fd,GIO_INIT,0);/* reset the controller */
         ioctl(fd,GIO_SETIV,0);/* load the intr vector */
         ioctl(fd,GIO_WAIT,timeout);/* wait for controller intr */
         ioctl(fd,GIO_SIGNAL,signal);/* send signal on controller intr */
         ioctl(fd,GIO_READ,&gseio);/* cp from controller to user buf */
         ioctl(fd,GIO_WRITE,&gseio);/* cp from user buf to controller */

         struct gse_io {
              int  v_addr; /* user virtual address */
              int  d_addr; /* device real address */
              int  byte_ct;/* byte count */
         };

     Access to the board from the application level emulator is also done
     through memory mapped addressing directly.  The standard mmap(2) function
     is provided by the driver to set that up.

     The standard select(2) function is also supported by the driver to
     facilitate the operation on the controller event from the emulator.

FILES
     /dev/gse

SEE ALSO
     cleanup(1), em3270(1), em5080(1), gateway(1), ld5080(1), sh5080(1).