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From: cl1 <charles.w.lambert@gmail.com>
Newsgroups: comp.lang.ada
Subject: Re: updating a hardware cursor with assembly and ada
Date: Thu, 6 Mar 2008 09:51:37 -0800 (PST)
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Date: 2008-03-06T09:51:37-08:00
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On Mar 6, 11:26=A0am, Georg Bauhaus <rm.tsoh-plus.nicif-
bauh...@maps.futureapps.de> wrote:
> cl1 schrieb:
>
> > unsigned char outportb (unsigned short _port, unsigned char _data)
> > {
> > =A0__asm__ __volatile__ ("outb %1, %0" : : "dN" (_port), "a" (_data));
> > }
> > ------------------------------------------------------------------------=
---=AD--
> > =A0 procedure Update_Cursor (Console : Video_Console) is
> > =A0 =A0 =A0procedure OutportB (Port : Natural; Data : Natural);
>
> Does type Natural match C type unsigned short on your system?

If it didn't, what problem would this pose?

> (Just a guess.) Maybe Interfaces.Unsigned_N is better choice.

I have no runtime (this is os development code). I don't know if i can
use the Interfaces packages in gnat with out it. I tried to implement
Unsigned_16 with out the operations and the compiler complained about
not having primitive operations defined on the part where i was doing
Data : Unsigned_16 :=3D Console.Column * 80 + Console.Row; even when
Column and Row were of type Unsigned_16;

>
>
>
> > =A0 =A0 =A0pragma Import(C, OutportB, "outportB");- Hide quoted text -
>
> - Show quoted text -