16. PARALLEL BIT PARITY GENERATOR USING MRC NOR-OR CIRCUITRY
Scope and Contents
A 6-page Technical Disclosure, plus 2-page Appendix, and thirteen (13) hand-drawn circuit/logic diagrams. Parity-checking is a paradigm in logic/data-processing circuitry to represent the odd or even count of the eight (8) "0 or 1" data bits, for example, of an 8-bit byte. A ninth bit - the parity bit - is a "1" if the "1" count within the 8-bit byte is 'odd', or is a "0" if the "1" bit count is even. This is known as an "odd" parity-bit generator; an even-bit parity generator would output a "0" bit for this example. This disclosure, authored by JVM, describes a general-case solution for a "2 to N bit-wide" word, employing MRC NOR-OR transistorized logic circuits. Developed in the early 1960's, long before integrated circuits were commonly available, this logic would fit in a tiny corner of an IC chip today
Dates
- Creation: 1952-1980
Creator
- From the Collection: McMillin, John V. (Person)
Conditions Governing Access
This collection is open for research.
Extent
From the Collection: 14.50 Linear Feet
Language of Materials
From the Collection: English
Repository Details
Part of the University of Iowa Archives Repository
100 Main Library
University of Iowa Libraries
Iowa City IA 52242
319-335-5921
lib-spec@uiowa.edu