gse(7)gse(7)NAMEgse - 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 ALSOcleanup(1), em3270(1), em5080(1), gateway(1), ld5080(1), sh5080(1).
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