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  Home > JCE Print > Journal of Chemical Education > Issues > 1996  > September  >
Information • Textbooks • Media • Resources
Computer Series
A Simple Digital Interface for the HP 5985 Mass Spectrometer Using a PC
K uruppu A. N. Dharmasiri, Michael Davenport, Curtis M. Regentin, Jack F. Holland, J. Throck Watson
Departments of Chemistry and Biochemistry, Michigan State University, East Lansing, MI 48824
Cover
September 1996
Vol. 73 No. 9
p. 881
Abstract
The design and construction of a simple digital interface for controlling a quadrupole mass spectrometer (HP 5985) and collecting data using a PC with an Intel 486 CPU is described. The asynchronous digital interface to the HP 5985 consists of separate 16-bit input and output ports with a write-strobe to initiate commands to the mass spectrometer and a status flag to indicate data validity for read/write operations. The host computer drives the interface via an enhanced version of the industry standard DIO24, the CIO-DIO48. The design of the CIO-DIO48 computer board is based on the industry workhorse 82C55 Programmable Peripheral Interface chips, which have two byte-wide bidirectional data ports, two 4-bit bidirectional data or control ports, and a control/status register which is used to configure data direction of the ports and mode of operation. An on-board PC/XT/AT bus interface plugs into an extra slot in the computer. All other electonic components of the HP 5985 can be used without modification.
More Information
*  Citation
 J. Chem. Educ. 1996 73 881.
*  Keywords
*  History
 Created:
Last Updated:		 September 21, 1999
February 21, 2006
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