Title :
An IEEE-488 interface for the CRL-32A microcomputer
Author :
Chen, Simon Jyh-Wen ; Hambacker, Kurt ; Dawson, Darrow F.
Author_Institution :
Dept. of Electr. Eng., Missouri Univ., Rolla, MO, USA
Abstract :
A general-purpose input/output (I/O) interface card, which includes an IEEE-488 bus, a parallel printer, and RS-232-C interfacing circuits, was designed and constructed. This interface card was designed to expand the present I/O communication capability of the main single-board computer CRL-32A. The design of the IEEE-488 bus interface was emphasized. The I/O support routines for the three types of interfacing were written both in assembly language and Forth. A Hazeltine terminal was used to help develop the routines for RS-232-C communication. A Centronics 737-1 printer was used to help develop the I/O routines for parallel printer communication. The HP-7470A graphics plotter and the HP-3438A digital multimeter were used to develop the routines for the IEEE-488 interface.<>
Keywords :
add-on boards; computer interfaces; microcomputers; standards; CRL-32A microcomputer; Centronics 737-1; Forth; HP-3438A digital multimeter; HP-7470A graphics plotter; Hazeltine terminal; IEEE-488 interface; RS-232-C interfacing circuits; assembly language; bus; input/output; interface card; parallel printer; support routines; Circuits; Computer interfaces; Instruments; Microcomputers; Microprocessors; Printers; Registers; Signal design; Timing; Transmitters;
Conference_Titel :
IEEE Region 5 Conference, 1988: 'Spanning the Peaks of Electrotechnology'
Conference_Location :
Colorado Springs, CO, USA
DOI :
10.1109/REG5.1988.15931
