--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/video/ataricommon/SDL_xbiosevents.c	Sun Mar 10 03:33:59 2002 +0000
@@ -0,0 +1,138 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002  Sam Lantinga
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Library General Public
+    License as published by the Free Software Foundation; either
+    version 2 of the License, or (at your option) any later version.
+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    Library General Public License for more details.
+
+    You should have received a copy of the GNU Library General Public
+    License along with this library; if not, write to the Free
+    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
+    Sam Lantinga
+    slouken@libsdl.org
+*/
+
+#ifdef SAVE_RCSID
+static char rcsid =
+ "@(#) $Id$";
+#endif
+
+/*
+ *	XBIOS mouse & joystick vectors
+ *
+ *	Patrice Mandin
+ */
+
+#include <stdlib.h>
+#include <string.h>
+#include <mint/osbind.h>
+
+#include "SDL_events_c.h"
+#include "SDL_xbiosevents_c.h"
+#include "SDL_xbiosinterrupt_s.h"
+
+/* Variables */
+
+int SDL_AtariXbios_enabled=0;
+
+static _KBDVECS *kbdvecs;		/* Pointer to access vectors */
+static _KBDVECS sys_kbdvecs;	/* Backup of system vectors */
+static Uint16 atari_prevmouseb;	/* buttons */
+
+void SDL_AtariXbios_InstallVectors(int vectors_mask)
+{
+	void *oldpile;
+
+	/* Clear variables */
+	SDL_AtariXbios_mouseb =
+		SDL_AtariXbios_mousex =
+		SDL_AtariXbios_mousey =
+		SDL_AtariXbios_joystick =
+		atari_prevmouseb = 0;
+
+	/* Read IKBD vectors base */
+	kbdvecs=Kbdvbase();
+
+	/* Go to supervisor mode */
+	oldpile=(void *)Super(0);
+
+	/* Backup system vectors */
+	memcpy(&sys_kbdvecs, kbdvecs, sizeof(_KBDVECS));
+
+	/* Install our vector */
+	SDL_AtariXbios_Install(
+		kbdvecs,
+		(vectors_mask & ATARI_XBIOS_MOUSEEVENTS) ? SDL_AtariXbios_MouseVector : NULL,
+		(vectors_mask & ATARI_XBIOS_JOYSTICKEVENTS) ? SDL_AtariXbios_JoystickVector : NULL
+	);
+
+	/* Back to user mode */
+	Super(oldpile);
+
+	SDL_AtariXbios_enabled=1;
+}
+
+void SDL_AtariXbios_RestoreVectors(void)
+{
+	void *oldpile;
+
+	/* Go to supervisor mode */
+	oldpile=(void *)Super(NULL);
+
+	/* Reinstall system vector */
+	SDL_AtariXbios_Install(kbdvecs,sys_kbdvecs.mousevec,sys_kbdvecs.joyvec);
+
+	/* Back to user mode */
+	Super(oldpile);
+}
+
+static int atari_GetButton(int button)
+{
+	switch(button)
+	{
+		case 0:
+			return SDL_BUTTON_RIGHT;
+			break;
+		case 1:
+		default:
+			return SDL_BUTTON_LEFT;
+			break;
+	}
+}
+
+void SDL_AtariXbios_PostMouseEvents(_THIS)
+{
+	/* Mouse motion ? */
+	if (SDL_AtariXbios_mousex || SDL_AtariXbios_mousey) {
+		SDL_PrivateMouseMotion(0, 1, SDL_AtariXbios_mousex, SDL_AtariXbios_mousey);
+		SDL_AtariXbios_mousex = SDL_AtariXbios_mousey = 0;
+	}
+	
+	/* Mouse button ? */
+	if (SDL_AtariXbios_mouseb != atari_prevmouseb) {
+		int i;
+
+		for (i=0;i<2;i++) {
+			int curbutton, prevbutton;
+
+			curbutton = SDL_AtariXbios_mouseb & (1<<i);
+			prevbutton = atari_prevmouseb & (1<<i);
+
+			if (curbutton & !prevbutton) {
+				SDL_PrivateMouseButton(SDL_PRESSED, atari_GetButton(i), 0, 0);
+			}
+			if (!curbutton & prevbutton) {
+				SDL_PrivateMouseButton(SDL_RELEASED, atari_GetButton(i), 0, 0);
+			}
+		}
+		atari_prevmouseb = SDL_AtariXbios_mouseb;
+	}
+}