Printer port adapter with overlaid one-wire interface for electr

Details Printer port adapter with overlaid one-wire interface for electr Printer port adapter with overlaid one-wire interface for electr

1990-12-19

1996-04-09

Lall, Parshotam S.

Boots, shoes, and leggings

3642295, 3642385, 3642865, 364DIG1, G06F 1300

Patent

active

055069916

ABSTRACT:
A printer port adapter which permits electronic keys to be accessed through the printer port of the PC, without disrupting the normal operation of the printer port in any mode of operation whatsoever. The electronic keys used have a one-wire signal interface, and this interface can be inserted into the full standard ISA printer port pin assignment, as well as the all known nonstandard additional assignments which have been overlaid onto the standard printer port.

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Dallas Semiconductor Printer Pont Keying DS1255, p. 326.

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