SNA IMF supports two modes of communication between the HP 3000 and
the host: programmatic access mode and Pass
Thru mode.
SNA IMF's programmatic access mode consists
of a set of subroutines called intrinsics.
Programs on the HP 3000 call these intrinsics to establish
communication and exchange data with application subsystems on the
IBM host. SNA IMF intrinsics can be called from programs written
in BASIC, COBOL, COBOL II, FORTRAN, Pascal, and SPL. In addition
to these languages, SNA IMF/XL also supports C. An HP 3000
program using SNA IMF intrinsics appears to the IBM host as an IBM
3278 display station or an IBM 3287 printer.
Pass Thru mode is SNA IMF's
interactive access mode. Through a program called Pass
Thru, HP terminals and printers attached to your HP
3000 can look, to the IBM host, like IBM 3278 display stations or IBM
3287 printers attached to an IBM 3276 or 3274 Cluster Controller. The
Pass Thru program calls the SNA IMF intrinsics that are used for programmatic
access mode. You can use Pass Thru for direct access to IBM host
application subsystems, without programming the HP 3000. Pass
Thru helps you develop and debug application programs that call SNA
IMF intrinsics.
