Date:	Mon, 6 Oct 1997 18:51:27 -0700 (PDT)
Message-Id:	<199710070151.SAA24347@adit.ap.net>
Mime-Version:	1.0
To:	"Alex Holden" <bigal2000 AT hotmail DOT com>, djgpp AT delorie DOT com
From:	Nate Eldredge <eldredge AT ap DOT net>
Subject:	Re: Writing code for both DJGPP and Linux.

At 05:03  10/6/1997 PDT, Alex Holden wrote:
>I am just starting a project in DJGPP (A PIC17C75XX programmer), which
>I want to be able to port to Linux at a later stage. It will use a 
>colour text interface, possibly the mouse, and will need to access the 
>serial port directly (to communicate with the device programmer).
>The problem is that I have no experience of Linux programming 
>whatsoever, and so I need some advice on exactly what I should do/avoid 
>doing, to make the job of porting the program to Linux as painless as 
>possible.
If you just want to do vanilla serial port access, you can read and write
the appropriate /dev/ttySx device. There are ioctl() calls to change the
baud rate and stuff; see the man pages. If you need to poke the port
directly, see the "Linux I/O port programming mini-HOWTO".
> I particularly would like to know how you set up/access the 
>serial port in Linux, and whether it's possible to do direct console io 
>(gotoxy(), intensevideo(), that type of thing).
I don't think you can, but I could be wrong. If it doesn't *have* to be
interactive, you could go with the usual Unix tradition of command-line
invocation with hairy options.
>Does anyone know of any 'beginners guide to Linux programming' or 'DOS 
>programmers guide to Linux programming' type of document available 
>online?
Sorry, no.

Nate Eldredge
eldredge AT ap DOT net

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