Message-ID: <004401bdf76c$1abc0420$72eca8c1@ardanwen>
From: "Felix" <natter AT metronet DOT de>
To: <djgpp AT delorie DOT com>
X-Mailer: Microsoft Outlook Express 4.72.3110.5
Subject: Re: Detecting Arrow Key Presses
X-MimeOLE: Produced By Microsoft MimeOLE V4.72.3110.3
Date: Wed, 14 Oct 1998 13:13:48 +0100
Warning: Sender was natter AT primus-online DOT de
Reply-To: djgpp AT delorie DOT com

if you want to use allegro, you probably have to switch to DJGPP (which is
the newsgroup you are using right now), otherwise intercept IRQ 1 (INT 9),
then (when you receive an IRQ) keep track of the key states (ie with an
array, like char KEY_FLAGS[MAX_SCANCODES]).
so when your int-9-handler is called you have to read from the PPI
(programmable peripheral interface), port 0x60, to get the scancode. if it
has bit 7 set, the key is released, otherwise pressed (or the other way
around).
i have not figured out how to read extended scancodes, so if you do, let me
know!
there are also many other ways (like reading from port 0x64, which I believe
doesn't work on XT's), you can also call int 0x16 (BIOS), or use some dos
functions..
i've just started using DJGPP and I've been using Turbo C++ 3.0 for almost
half a year before.... somewhere on the web there is a doc on how to deal
with its bugs (like increasing memory available to the program, executing
32bit inline-assembly-instructions...) - you might want to look at that!
it's from Jouni Miettunen (jon AT stekt DOT oulu DOT fi)
besides, my name is Felix, not whatever the from-line says (i don't know how
to change it!)
DoctorXV AT aol DOT com schrieb in Nachricht <5a92fc80 DOT 36229998 AT aol DOT com>...
>How do I get C++ to detect when someone presses and arrow key. I want to
make
>something move when someone press the arrow key. Also...is it possible to
load
>an image into my program without using Allegro? I use Turbo C++ 3.0.
>
>- Brett