Re: (slightly OT:) Parallel port question

From: Groepaz (
Date: 2003-10-15 17:40:14

On Wednesday 15 October 2003 07:49, Baltissen, GJPAA (Ruud) wrote:
> Hallo Gpz,
> > 8255 sorry :)
> What 8255? Only the old XT has a 8255 onboard and that one is used for the
> keyboard, reading the dipswitches etc. but not for the LPT. The original
> LPT is made out of several TTL IC's. In fact I hunt these older cards
> because a) they are very easy to turn into a bidirectional port by just
> some cutting and adding three wires and b) these TTL-IC's make it quite
> robust.

8255 is robust enough for me :)

> Remark: I once had an old dragable that indeed used a 8255 for its built-in
> LPT port but because of that it was incompatible with a lot of newer
> software.

oh well... just like almost every pc serial port "behaves like" a 16550UART, 
almost every (SPP-) parallelport "behaves like" a 8255. who carez whats actually
written on the damned chip? :=)


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