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From: ramcte01@ULKYVX.BITNET
Newsgroups: sci.electronics
Subject: Re: Barcode readers
Message-ID: <50ramcte01@ULKYVX.bitnet>
Date: 25 May 90 12:57:00 GMT
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: University of Louisville
Lines: 26

The manual referred to is "Microprocessor Applications Manual", published by
Motorola (printed by McGraw-Hill) in 1975.

Pages 5-12 to 5-40 describe the hardware and software for using an MC6800
processor to read UPC codes. Included are flowcharts, schematics, and a
software listing.

One could probably lift the code and port it more or less directly to a newer
processor like the HD63P01 (a 6801 compatible made by Hitachi [and one of my
favorite chips - why doesn't Motorola make one with a piggyback Eprom socket?])

We had a student design a bar-code reader using some of this information. Watch
out for parasitics in the analog section...


Rick McTeague
Electrical Engineering Department, Speed Scientific School
University of Louisville, Louisville, KY 40292
(502) 588-7020

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