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From: jojo@crystal.UUCP
Newsgroups: comp.sys.ibm.pc
Subject: Turning on sound and keyboard info.
Message-ID: <262@crys.WISC.EDU>
Date: Tue, 24-Feb-87 14:19:03 EST
Article-I.D.: crys.262
Posted: Tue Feb 24 14:19:03 1987
Date-Received: Fri, 27-Feb-87 00:16:12 EST
Distribution: comp
Organization: U of Wisconsin CS Dept
Lines: 27
Keywords: sound, keyboard


	I'm currently writing a game in C and want to add sound.  The problem
is that the all the sound routines I have will play a frequency for some
duration. (usually by busy waiting)  What I'm looking for is something
similar to Turbo Pascal's soundon and soundoff routines.  These routines
turn the speaker on and have it play a frequency without supervision of
the cpu.  Does anyone know how to do this?

	Secondly, I know how int 9 and int 16 work for getting keyboard input,
when you press a key, the chip in the keyboard signals a hardware int. through
int 9.  Int 9 then reads in the scan code, etc from port 60(?)  From what I
hear, there's another port (61?) which can tell you if a key is being pressed.
This would be real handy, if it were true, for moving an object on the screen
for as long as the a key is being pressed.  I've seen this done in several
games and wondered HOW DO THEY DO IT?  I'm not talking about the shift keys
either since BIOS can tell you if they are pressed.  It's the rest of the
keypad I want to know about.  Does anyone know how this works.

thanx in advance,
--j


-- 
jon wesener
jojo@crys.wisc.edu
	"Than it struck me, I just might die with a smile on my face
	 after all."                                    --Morrissey