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From: "Jean-Pierre GHYS" <jean-pierre DOT ghys AT inrets DOT fr>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: WHY IRQ WANT RUN ????  HELP ???
Date: Fri, 8 Feb 2002 11:58:33 -0000
Organization: I.N.R.E.T.S.
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References: <a3tcqq$1tu$1 AT orion DOT inrets DOT fr> <570-Fri08Feb2002124307+0200-eliz AT is DOT elta DOT co DOT il>
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> I don't see any big bugs, except that you should call init_port and
> init_8259 only _after_ setting up the protected-mode handler for
> IRQ 7.
>
> The real problem in this program seems to be that it doesn't do
> anything that is supposed to trigger an interrupt from the LPT port.
> My references indicate that the interrupt happens when there's an
> acknowledge pulse, so you should do something that causes the printer
> to send such a pulse.

Thanks for anwser Eli or dear OM(I am a radioa amateur)
i will see for the call init port after after_ setting up the protected-mode
handler

and i saw this afternoon how the parallel port works and generate pulse down
from 1 to 0 in 5 to 50 micro seconde maximum to respect the ack of a real
printer
i will use a pulse generator to perform this pulse

Many thanks again

Ghys Jean-pierre