Hello Mr. Peter Jack,

Two of the best free programs can be downloaded at the below web sites.

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http://www.protel.com/resources...x161nd.exe

Autotrax (zip - 821KB) DOS Freeware version 1.61 - Complete PCB layout package with output support for printers, pen plotters and Gerber.
To install: Download and run the file in the root directory of your hard drive to extract the install program. The install program must be run from the root directory.
See the readme file for more information.
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http://www.protel.com/resources...sytrax.htm

EasyTrax (zip - 485KB) DOS Freeware version 2.06 - Complete PCB layout package with output support for printers, pen plotters and Gerber. System requirements: PC-compatible; DOS 2.0 or later; 640K RAM; 2Mb of hard disk space.

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The following web address schmatic was created using this software.

http://members.aol.com/cpu8052/motdet.gif

Regards,

Charles Bannister