Organization:	Ecole Nationale Superieure des Telecommunications, Paris
From:	David Powers <powers AT inf DOT enst DOT fr>
Subject:	Re: Async library for djgpp - experience and/or suggestions?
To:	mennen!mennil!crummi!dani AT acsu DOT buffalo DOT edu (Dani Flexer)
Date:	Mon, 14 Jun 1993 11:39:17 +0200 (MET DST)
Cc:	djgpp AT sun DOT soe DOT clarkson DOT edu

> I can probably get by without interrupt-driven transmission, but it
> would mean some nasty kludging in my code to make sure it behaves
> itself when there is a lot of output to the line going on. Does
> anybody have any suggestions as to how best to implement interrupt
> driven transmission in "async"? Has anybody tried doing this? Does
> anyone care to volunteer hints/tips/warnings on this?
> 
> Thanks a lot. Your a great bunch...
> 
> ---------------------------------------------------------------------
> Dani Flexer,                                       MENNEN MEDICAL LTD.

 I just picked this async stuff up recently, and haven't figured
 it out yet (I think there is something else I haven't tracked
 down yet: the original DJ version and documentation).

 Last year I dealt with my async problems by writing a series
 of assembler routines which checked whether a port was ready
 to read or write before attempting it, waited or returned without
 wait, checked (and buffered and updated) status, etc.

 I did still have a problem which seemed only would go away
 by handling interrupts, so I rewrote it to work with a FOSSIL
 driver (I think it was X00 I got it working with).

 I meant to knock it into shape, but have moved on to other
 things (and to another country where it is too expensive to
 use a modem from home).  I've reformatted my harddisk since
 then, but I mean to dig through my backups for this sometime.
 Working with a FOSSIL driver made everything pretty simple,
 and the second library was I think all written directly in
 GCC (C or C++, I forget which).  (With some FOSSIL drivers
 I had problems relating to status signals which my modems
 and cables didn't use, but X00 was the one that worked for
 me I think.)

 dP


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