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From: rosenkra@hall.cray.com (Bill Rosenkranz)
Newsgroups: comp.sys.atari.st
Subject: resetting the mouse position
Summary: how?
Message-ID: <2947@hall.cray.com>
Date: 5 Jun 89 15:28:31 GMT
Reply-To: rosenkra@hall.UUCP (Bill Rosenkranz)
Organization: Cray Research, Inc., Mendota Heights, MN
Lines: 44


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help, please!!!

i need to know how i can change the position of the mouse cursor (and
of course its internal absolute coord).

i tried something like:

	hide_mouse ();
	Bconout (4, 0x0E);		/* ikbd command (set abs pos) */
	Bconout (4, 0x00);		/* filler */
	Bconout (4, newx_MSB);		/* new coord */
	Bconout (4, newx_LSB);
	Bconout (4, newy_MSB);
	Bconout (4, newy_LSB);
	show_mouse ();

to no avail. the coord are pixel coord, 0,0 in UL (i have left the ikbd
in the state it was booted at, and i invoked the gem program from gulam...
i hope my "obedient servent" is not biting again). or is there something
silly like the arg to Bconout is an int and the command/data packet needs
to be char? ir do i have to call the ikbdwc() function burried in the
bios somewhere? or do i have to set up some sort of interupt handler?
btw: does the ikbd send anything back after this call (i mean other than
"normal" mouse/key/joystick/inquiry packets)?

i guess the more general question is: how do you send data to the ikbd?
the commands themselves are easy, the Bconout works for a 1 byte command.
i know how to get data from an inquiry command (using a service routine
installed on the keyboard vector, say to read joysticks). i tried
this with a mega4 (TOS 1.2).

there is an illegal way of doing this, but (to keep allan happy :^)
the solution MUST be legal. the program "mousdoub" does it (i think)
illegally (at least it uses the pointer-to-bios-function-tables-returned-
in-a0-on-illegal-biosfunction trick...

infinite thanx...

-bill rosenkranz
rosenkra@hall.cray.com

(pls send mail as news is rather sporadic here...)