þa‹Rþw5þ mP9þhý oþ nSystem-wide^CL ^BOSpecification for InteGRiD driver for SAIT GPIB cartridge^BO ^CL ^UNBackground^UN SAIT has developed a GPIB cartridge for GRiDCase 1500 computers. The cartridge hardware design is based on (and fully compatible with) the IOtech GP488A GPIB Interface Board for IBM PC compatible computers. Software support is provided by IOtech's "Driver488" software, which is also supposed to support GPIB boards from National Instruments, IBM, Keithley, and Capital Equipment. This driver software provides MS-DOS programmatic access to the full GPIB command set. There are a number of GRiD-OS and InteGRiD programs which have been developed to perform various GPIB functions, using the built in GPIB interfaces on the GRiD Compass and Tempest GRiDCase (1307) computers. These programs have mainly used the computer's built in GPIB drivers, which all provide the same GRiD-OS/InteGRiD software interface, even though the underlying hardware differs. This GRiD GPIB software interface supports only a subset of the GPIB command set. It does not support parallel poll, group execute trigger, multiple listeners, serial polls other than in response to SRQ, and third party transfers (transfers where the computer is not a talker or listener). The SAIT GPIB cartridge provides a GPIB hardware interface on GRiDCase 1500 computers. To allow existing InteGRiD programs that use the GRiD GPIB software interface to run on this hardware, GRiD will develop an InteGRiD device driver that provides with the GRiD GPIB software interface to InteGRiD programs, but uses the IOtech Driver488 software toaccess the GPIB hardware.