About the article

Printer port extension:

up to 256 I/O lines on a standard printer port

Based on a Labs project | October 2011 | Find it here
Printer port extension:
With a modest number of components, the standard PC printer port can be transformed into an I/O system with up to 256 I/O lines. This article completely describes both the hardware and the necessary BASIC software. The hardware can also easily be controlled using other programming languages.
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