Path: utzoo!attcan!uunet!lll-winken!sol.ctr.columbia.edu!zaphod.mps.ohio-state.edu!caen!umich!yale!husc6!unix!mxmora
From: mxmora@unix.SRI.COM (Matt Mora)
Newsgroups: comp.sys.mac.programmer
Subject: Re: How can I move the cursor with THINKC??
Message-ID: <17590@unix.SRI.COM>
Date: 25 Oct 90 16:10:55 GMT
References: <55432.2723256d@pttrnl.nl>
Reply-To: mxmora@unix.UUCP (Matt Mora)
Organization: SRI International, Menlo Park, CA
Lines: 55

In article <55432.2723256d@pttrnl.nl> nugteren@pttrnl.nl writes:
>I am writing a trackball driver that would allow connection of an MSDOS Mouse
>(actually optical trackball) to a Mac II. One of the problems I have to solve
>is how to change to cursor position on the screen from a software level.
>I have found the addresses in RAM that contain the current cursor position
>(0x830). But now I would like to know which routine to call to refresh the
>screen. Does anyone know where this ROM routine starts??
>
>
>I would appreciate any tips you might have!!
>
>Thanks in advance,
>
>Nils


From UMPG page 10:


This seems to come up every few months. I've posted bad Pascal code for this SetMouse routine in the past. Here's a Think C version:


/* ------------------------- SetMouse ------------------------- */
/* some dangerous low-memory-global equates */
extern	Point	MTemp		:	0x828;
extern	Point	RawMouse	:	0x82c;
extern	Point	Mouse		:	0x830;
extern	Byte	MBState		:	0x172;
extern	int	CrsrNewCouple	:	0x8ce;  /* both New & Couple */
extern	Byte	CrsrNew		:	0x8ce;
extern	Byte	CrsrCouple	:	0x8cf;

#define 	Couple		0xff;	/* value for CrsrCouple */
#define 	Uncouple	0x00;	/* value for CrsrCouple */

void	SetMouse(where)
Point	where;
{
long	finalTicks;
	LocalToGlobal(&where);   /* Get ready to store mouse position */
	RawMouse = where;        /* into RawMouse */
	MTemp = where;           /* and MTemp */
	CrsrNewCouple = 0xffff;  /* Hit CrsrNew & CrsrCouple */
	Delay(5, &finalTicks);   /* let the cursor catch up */
}	/* SetMouse */


From: cbm@well.UUCP (Chris Muir)


-- 
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Matthew Mora                |   my Mac  Matt_Mora@sri.com
SRI International           |  my unix  mxmora@unix.sri.com
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