Re: [PARPORT] how fast is a parallel port really?

Tim Waugh (tim@cyberelk.demon.co.uk)
Tue, 28 Sep 1999 21:11:09 +0100 (BST)

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On Tue, 28 Sep 1999, Karl-Max Wagner wrote:

> The protocol stuff could probably be handled in software. But
> what do you mean by "in the electrical sense". Do the data lines
> not go high impedance in reception or what ?

You can't map control lines to status lines one-to-one. You have spare
signals left over.

> Where can I get the specs of PS2, ECP and EPP ?

IEEE 1284. (There are some good documents on the web if you do a search
though.)

Tim.
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