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New literature
Publication year - 1967
Publication title -
journal of the american oil chemists' society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.512
H-Index - 117
eISSN - 1558-9331
pISSN - 0003-021X
DOI - 10.1007/bf02908386
Subject(s) - citation , computer science , information retrieval , library science
The PCX, a personal computer ex-pander kit, has been announced by NCR Industrial Systems. The PCX kit consists of a terminal communications card, a software driver, a demonstration program , and an NCR 2840 data collection terminal. The terminal includes a bar code wand, an alphanumeric keyboard, a 16-character display, and an optical badge reader. The communications card features an optically isolated RS-422 port, an RS-232 port, and a timer. With superior common mode noise rejection and true ground isolation between the PC and the terminal network, the RS-422 driver can support as many as 32 devices at distances of up to 4000 feet. Communication rate is 9600 bps. The RS-232 port has selectable character length, parity bits, stop bits, and communication rates from 1200 to 9600 bps. The board can operate in a polled mode or with switch-selectable interrupts.