From mboxrd@z Thu Jan  1 00:00:00 1970
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From: sjames@wam.umd.edu (Scott H. James)
Subject: Re: OS specific support in ADA
Date: 1996/07/03
Message-ID: <4re096$fpt@rac3.wam.umd.edu>#1/1
X-Deja-AN: 163499209
references: <31D5A7CF.6547@world2u.com>
organization: University of Maryland, College Park
newsgroups: comp.lang.ada
Date: 1996-07-03T00:00:00+00:00
List-Id: <comp.lang.ada>


As noted already, some OS support, and DOS support in particular, is
not properly speaking an Ada (or C) issue, however other Ada compilers
do in fact provide interrupt packages, port, and direct memory access
services.  Through the C interface to DJGPP functions you will find
GNAT readily suitable for the first two tasks, however, direct memory
access will not be as straight forward since using representation
clauses to access physical memory is, AFAIK, not possible in GNAT.

Another option for a cheap, more DOS friendly compiler is through R&R
software: (800)722-3248.  DOS and BIOS interrupts (procedures
provided) and direct memory access (through rep clauses) are
available.  It is not free, but if you are a student I believe the
16-bit version costs all of 75 bucks. (I'm not associated with R&R but
I did live in Madison WI once :-)

Have fun
scott