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Subject: Re: Device driver in Ada95
References: <3C7AAA8B.6020507@users.sf.net>
From: Jerry van Dijk <jvandyk@attglobal.net>
Date: 25 Feb 2002 23:06:21 +0100
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Dave Poirier <instinc@users.sf.net> writes:

> My next step is to start to write device drivers in Ada95 using this same
> setup, so as to have as useable os sooner or later.  As my first try, I
> decided to create a small vga driver for text mode.  This requires that I
> write in memory from 0xB8000 to 0xB8A9F.

This is not very difficult to do. However, GNAT generated x86 code depends
on the memory management used. So the question here is: are you using
real-mode, or DPMI, or some other PMODE driver for your own kernel ? Or
if you use your own scheme, how is the memory organised ?

-- 
--  Jerry van Dijk   | email: jvandyk@attglobal.net
--  Leiden, Holland  | web:   users.ncrvnet.nl/gmvdijk