src/MacOSX/Emulator.mm

/*
 *      Emulator.mm - Class whose actions are attached to GUI widgets in a window,
 *                                used to control a single Basilisk II emulated Macintosh. 
 *
 *      $Id: Emulator.mm,v 1.4 2002/12/18 11:50:12 nigel Exp $
 *
 *  Basilisk II (C) 1997-2002 Christian Bauer
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program 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 General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#import "Emulator.h"
#import "EmulatorView.h"

@implementation Emulator

#import "sysdeps.h"                     // Types used in Basilisk C++ code

#import "main_macosx.h"         // Prototypes for QuitEmuNoExit() and InitEmulator()
#import "misc_macosx.h"         // Some other prototypes
#import "video_macosx.h"        // Some window/view globals

#import <adb.h>
#import <main.h>
#import <prefs.h>
#import <timer.h>

#undef check()                          // memory.h defines a check macro, clashes with an OS X one?
#import <cpu_emulation.h>

#define DEBUG 0
#import <debug.h>

// NSWindow method, which is invoked via delegation

- (BOOL) windowShouldClose: (id)sender
{
        if ( uaeCreated )
        {
                NSLog(@"windowShouldClose returning NO");
                return NO;      // Should initiate poweroff and return NSTerminateLater ?
        }

        NSLog(@"windowShouldClose returning YES");
        return YES;
}

// Default methods

- (Emulator *) init
{
        int frameSkip;

        self = [super init];

        running = NO;                   // Save churn when application loads
//      running = YES;
        uaeCreated = NO;

        frameSkip = PrefsFindInt32("frameskip");
        if ( frameSkip )
                redrawDelay = frameSkip / 60.0;
        else
                redrawDelay = 0.0;

        // We do this so that we can work out if we are in full screen mode:
        parse_screen_prefs(PrefsFindString("screen"));

        [self createThreads];

        return self;
}

- (void) awakeFromNib
{
        the_win = win;                                  // Set global for access by Basilisk C++ code


        [win setDelegate: self];                // Enable windowShouldClose calling

        // Try to speed up everything
        //[win setHasShadow: NO];               // This causes view & window to now be drawn correctly
        [win useOptimizedDrawing: YES];                 

//      [win center];
        [win makeKeyAndOrderFront:self];

//      [self resizeWinToWidth:x Height:y];

        if ( redrawDelay )
                [speed setFloatValue: 1.0 / redrawDelay];
        else
                [speed setFloatValue: 60.0];


        if ( runOrPause == nil )
                NSLog(@"%s - runOrPause button pointer is nil!", __PRETTY_FUNCTION__);

        [self runUpdate];
}


// Helpers which other classes use to access our private stuff

- (BOOL)                        isRunning       {       return running;         }
- (BOOL)                        uaeCreated      {       return uaeCreated;      }
- (EmulatorView *)      screen          {       return screen;          }
- (NSSlider *)          speed           {       return speed;           }
- (NSWindow *)          window          {       return win;                     }


// Update some UI elements

- (void) runUpdate
{
        if ( running )
                [runOrPause setState: NSOnState];       // Running. Change button label to 'Pause'
        else
                [runOrPause setState: NSOffState];      // Paused.  Change button label to 'Run'
        
        [win setDocumentEdited: uaeCreated];    // Set the little dimple in the close button
}


// Methods invoked by buttons & menu items

- (IBAction) Benchmark: (id)sender;
{
        BOOL    wasRunning = running;

        if ( running )
                [self Suspend: self];
        [screen benchmark];
        if ( wasRunning )
                [self Resume: self];
}

- (IBAction) Interrupt: (id)sender;
{
        WarningSheet (@"Interrupt action not yet supported", win);
}

- (IBAction) PowerKey:  (id)sender;
{
        if ( uaeCreated )               // If Mac has started
        {
                ADBKeyDown(0x7f);       // Send power key, which is also
                ADBKeyUp(0x7f);         // called ADB_RESET or ADB_POWER
        }
        else
        {
                running = YES;                                          // Start emulator
                [self runUpdate];
                [self Resume: nil];
        }
}

- (IBAction) Restart: (id)sender
{
        if ( running )
//              reset680x0();
        {
                uaeCreated = NO;
                [redraw suspend];
                NSLog (@"%s - uae_cpu reset not yet supported, will try to fake it",
                                __PRETTY_FUNCTION__);

//              [screen blacken];
                [screen setNeedsDisplay: YES];

                [emul terminate]; QuitEmuNoExit();

                emul = [NNThread new];
                [emul perform:@selector(emulThread) of:self];
                [emul start];

                if ( display_type != DISPLAY_SCREEN )
                        [redraw resume];
                uaeCreated = YES;
        }
}

- (IBAction) Resume: (id)sender
{
        [RTC    resume];
        [emul   resume];
        if ( display_type != DISPLAY_SCREEN )
                [redraw resume];
        [tick   resume];
        [xPRAM  resume];
}

- (IBAction) ScreenHideShow: (NSButton *)sender;
{
        WarningSheet(@"Nigel doesn't know how to shrink or grow this window",
                                 @"Maybe you can grab the source code and have a go yourself?",
                                 nil, win);
}

- (IBAction) Snapshot: (id) sender
{
        if ( screen == nil || uaeCreated == NO  )
                WarningSheet(@"The emulator has not yet started.",
                                         @"There is no screen output to snapshot",
                                         nil, win);
        else
        {
                NSData  *TIFFdata;

                [self Suspend: self];

                TIFFdata = [screen TIFFrep];
                if ( TIFFdata == nil )
                        NSLog(@"%s - Unable to convert Basilisk screen to a TIFF representation",
                                        __PRETTY_FUNCTION__);
                else
                {
                        NSSavePanel *sp = [NSSavePanel savePanel];

                        [sp setRequiredFileType:@"tiff"];

                        if ( [sp runModalForDirectory:NSHomeDirectory()
                                                                         file:@"B2-screen-snapshot.tiff"] == NSOKButton )
                                if ( ! [TIFFdata writeToFile:[sp filename] atomically:YES] )
                                        NSLog(@"%s - Could not write TIFF data to file @%",
                                                        __PRETTY_FUNCTION__, [sp filename]);

                }
                if ( running )
                        [self Resume: self];
        }
}

- (IBAction) SpeedChange: (NSSlider *)sender
{
        float frequency = [sender floatValue];
        
        [redraw suspend];

        if ( frequency == 0.0 )
                redrawDelay = 0.0;
        else
        {
                frequencyToTickDelay(frequency);

                redrawDelay = 1.0 / frequency;

                [redraw changeIntervalTo: (int)(redrawDelay * 1e6)
                                                   units: NNmicroSeconds];
                if ( running && display_type != DISPLAY_SCREEN )
                        [redraw resume];
        }
}

- (IBAction) Suspend: (id)sender
{
        [RTC    suspend];
        [emul   suspend];
        [redraw suspend];
        [tick   suspend];
        [xPRAM  suspend];
}

- (IBAction) ToggleState: (NSButton *)sender
{
        running = [sender state];               // State of the toggled NSButton
        if ( running )
                [self Resume: nil];
        else
                [self Suspend: nil];
}

- (IBAction) Terminate: (id)sender;
{
        [self exitThreads];
        [win performClose: self];
}

#include <xpram.h>

#define XPRAM_SIZE      256

uint8 lastXPRAM[XPRAM_SIZE];            // Copy of PRAM

- (IBAction) ZapPRAM: (id)sender;
{
        memset(XPRAM,     0, XPRAM_SIZE);
        memset(lastXPRAM, 0, XPRAM_SIZE);
        ZapPRAM();
}

//
// Threads, Timers and stuff to manage them:
//

- (void) createThreads
{
#ifdef USE_PTHREADS
        // Make UI threadsafe:
        [NSThread detachNewThreadSelector:(SEL)"" toTarget:nil withObject:nil];
        //emul   = [[NNThread   alloc] initWithAutoReleasePool];
#endif
        emul   = [NNThread      new];
        RTC    = [NNTimer       new];
        redraw = [NNTimer       new];
        tick   = [NNTimer       new];
        xPRAM  = [NNTimer       new];

        [emul  perform:@selector(emulThread)    of:self];
        [RTC    repeat:@selector(RTCinterrupt)  of:self
                         every:1
                         units:NNseconds];
        [redraw repeat:@selector(redrawScreen)  of:self
                         every:(int)(1000*redrawDelay)
                         units:NNmilliSeconds];
        [tick   repeat:@selector(tickInterrupt) of:self
                         every:16625
                         units:NNmicroSeconds];
        [xPRAM  repeat:@selector(xPRAMbackup)   of:self
                         every:60
                         units:NNseconds];

        if ( running )          // Start emulator, then threads in most economical order
        {
                [emul   start];
                [xPRAM  start];
                [RTC    start];
                if ( display_type != DISPLAY_SCREEN )
                        [redraw start];
                [tick   start];
        }
}

- (void) exitThreads
{
        running = NO;
        [emul   terminate];  [emul       release]; emul   = nil;
        [tick   invalidate]; [tick       release]; tick   = nil;
        [redraw invalidate]; [redraw release]; redraw = nil;
        [RTC    invalidate]; [RTC        release]; RTC    = nil;
        [xPRAM  invalidate]; [xPRAM      release]; xPRAM  = nil;
        if ( uaeCreated )
                QuitEmuNoExit();
}

- (void) emulThread
{
        NSAutoreleasePool       *pool = [NSAutoreleasePool new];

        if ( ! InitEmulator() )
        {
                [redraw suspend];               // Stop the barberpole

                ErrorSheet(@"Cannot start Emulator", @"", @"Quit", win);
        }
        else
        {
                memcpy(lastXPRAM, XPRAM, XPRAM_SIZE);

                uaeCreated = YES;               // Enable timers to access emulated Mac's memory

                while ( screen == nil ) // If we are still loading from Nib?
                        [NSThread sleepUntilDate:[NSDate dateWithTimeIntervalSinceNow: 1.0]];

                [self   runUpdate];             // Set the window close gadget to dimpled

                Start680x0();                   // Start 68k and jump to ROM boot routine

                puts ("Emulator exited normally");
        }

        [pool release];
        QuitEmulator();
}

- (void) RTCinterrupt
{
        if ( uaeCreated )
                WriteMacInt32 (0x20c, TimerDateTime() );        // Update MacOS time
}

- (void) redrawScreen
{
        if ( display_type == DISPLAY_SCREEN )
        {
                NSLog(@"Why was redrawScreen() called?");
                return;
        }
        [barberPole animate:self];                      // wobble the pole
        [screen setNeedsDisplay: YES];          // redisplay next time through runLoop
        // Or, use a direct method. e.g.
        //      [screen cgDrawInto: ...];
}

#include <main.h>                               // For #define INTFLAG_60HZ
#include <rom_patches.h>                // For ROMVersion
#include "macos_util_macosx.h"  // For HasMacStarted()

- (void) tickInterrupt
{
        if ( ROMVersion != ROM_VERSION_CLASSIC || HasMacStarted() )
        {
                SetInterruptFlag (INTFLAG_60HZ);
                TriggerInterrupt  ();
        }
}

- (void) xPRAMbackup
{
        if ( uaeCreated &&
                memcmp(lastXPRAM, XPRAM, XPRAM_SIZE) )  // if PRAM changed from copy
        {
                memcpy (lastXPRAM, XPRAM, XPRAM_SIZE);  // re-copy
                SaveXPRAM ();                                                   // and save to disk
        }
}

@end
Revision:	1.5
Committed:	2003-03-26T01:45:31Z (21 years, 7 months ago) by nigel
Branch:	MAIN
Changes since 1.4:	+8 -12 lines
Log Message:	Correctly deal with error conditions from InitEmulator()
#	User	Rev	Content
1	nigel	1.1	/*
2			* Emulator.mm - Class whose actions are attached to GUI widgets in a window,
3			* used to control a single Basilisk II emulated Macintosh.
4			*
5	nigel	1.5	* $Id: Emulator.mm,v 1.4 2002/12/18 11:50:12 nigel Exp $
6	nigel	1.1	*
7			* Basilisk II (C) 1997-2002 Christian Bauer
8			*
9			* This program is free software; you can redistribute it and/or modify
10			* it under the terms of the GNU General Public License as published by
11			* the Free Software Foundation; either version 2 of the License, or
12			* (at your option) any later version.
13			*
14			* This program is distributed in the hope that it will be useful,
15			* but WITHOUT ANY WARRANTY; without even the implied warranty of
16			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17			* GNU General Public License for more details.
18			*
19			* You should have received a copy of the GNU General Public License
20			* along with this program; if not, write to the Free Software
21			* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22			*/
23
24			#import "Emulator.h"
25			#import "EmulatorView.h"
26
27			@implementation Emulator
28
29			#import "sysdeps.h" // Types used in Basilisk C++ code
30
31			#import "main_macosx.h" // Prototypes for QuitEmuNoExit() and InitEmulator()
32			#import "misc_macosx.h" // Some other prototypes
33			#import "video_macosx.h" // Some window/view globals
34
35			#import <adb.h>
36			#import <main.h>
37			#import <prefs.h>
38			#import <timer.h>
39
40	nigel	1.4	#undef check() // memory.h defines a check macro, clashes with an OS X one?
41	nigel	1.1	#import <cpu_emulation.h>
42
43	nigel	1.4	#define DEBUG 0
44	nigel	1.1	#import <debug.h>
45
46			// NSWindow method, which is invoked via delegation
47
48			- (BOOL) windowShouldClose: (id)sender
49			{
50			if ( uaeCreated )
51			{
52			NSLog(@"windowShouldClose returning NO");
53			return NO; // Should initiate poweroff and return NSTerminateLater ?
54			}
55
56			NSLog(@"windowShouldClose returning YES");
57			return YES;
58			}
59
60			// Default methods
61
62			- (Emulator *) init
63			{
64			int frameSkip;
65
66			self = [super init];
67
68			running = NO; // Save churn when application loads
69			// running = YES;
70			uaeCreated = NO;
71
72			frameSkip = PrefsFindInt32("frameskip");
73			if ( frameSkip )
74			redrawDelay = frameSkip / 60.0;
75			else
76			redrawDelay = 0.0;
77
78			// We do this so that we can work out if we are in full screen mode:
79			parse_screen_prefs(PrefsFindString("screen"));
80
81			[self createThreads];
82
83			return self;
84			}
85
86			- (void) awakeFromNib
87			{
88			the_win = win; // Set global for access by Basilisk C++ code
89
90
91			[win setDelegate: self]; // Enable windowShouldClose calling
92
93			// Try to speed up everything
94			//[win setHasShadow: NO]; // This causes view & window to now be drawn correctly
95			[win useOptimizedDrawing: YES];
96
97			// [win center];
98			[win makeKeyAndOrderFront:self];
99
100			// [self resizeWinToWidth:x Height:y];
101
102			if ( redrawDelay )
103			[speed setFloatValue: 1.0 / redrawDelay];
104			else
105			[speed setFloatValue: 60.0];
106
107
108			if ( runOrPause == nil )
109			NSLog(@"%s - runOrPause button pointer is nil!", __PRETTY_FUNCTION__);
110
111			[self runUpdate];
112			}
113
114
115			// Helpers which other classes use to access our private stuff
116
117			- (BOOL) isRunning { return running; }
118			- (BOOL) uaeCreated { return uaeCreated; }
119			- (EmulatorView *) screen { return screen; }
120			- (NSSlider *) speed { return speed; }
121			- (NSWindow *) window { return win; }
122
123
124			// Update some UI elements
125
126			- (void) runUpdate
127			{
128			if ( running )
129			[runOrPause setState: NSOnState]; // Running. Change button label to 'Pause'
130			else
131			[runOrPause setState: NSOffState]; // Paused. Change button label to 'Run'
132
133			[win setDocumentEdited: uaeCreated]; // Set the little dimple in the close button
134			}
135
136
137			// Methods invoked by buttons & menu items
138
139			- (IBAction) Benchmark: (id)sender;
140			{
141			BOOL wasRunning = running;
142
143			if ( running )
144			[self Suspend: self];
145			[screen benchmark];
146			if ( wasRunning )
147			[self Resume: self];
148			}
149
150			- (IBAction) Interrupt: (id)sender;
151			{
152	nigel	1.3	WarningSheet (@"Interrupt action not yet supported", win);
153	nigel	1.1	}
154
155			- (IBAction) PowerKey: (id)sender;
156			{
157			if ( uaeCreated ) // If Mac has started
158			{
159			ADBKeyDown(0x7f); // Send power key, which is also
160			ADBKeyUp(0x7f); // called ADB_RESET or ADB_POWER
161			}
162			else
163			{
164			running = YES; // Start emulator
165			[self runUpdate];
166			[self Resume: nil];
167			}
168			}
169
170			- (IBAction) Restart: (id)sender
171			{
172			if ( running )
173			// reset680x0();
174			{
175			uaeCreated = NO;
176			[redraw suspend];
177			NSLog (@"%s - uae_cpu reset not yet supported, will try to fake it",
178			__PRETTY_FUNCTION__);
179
180			// [screen blacken];
181			[screen setNeedsDisplay: YES];
182
183			[emul terminate]; QuitEmuNoExit();
184
185	nigel	1.4	emul = [NNThread new];
186	nigel	1.1	[emul perform:@selector(emulThread) of:self];
187			[emul start];
188
189			if ( display_type != DISPLAY_SCREEN )
190			[redraw resume];
191			uaeCreated = YES;
192			}
193			}
194
195			- (IBAction) Resume: (id)sender
196			{
197			[RTC resume];
198			[emul resume];
199			if ( display_type != DISPLAY_SCREEN )
200			[redraw resume];
201			[tick resume];
202			[xPRAM resume];
203			}
204
205	nigel	1.2	- (IBAction) ScreenHideShow: (NSButton *)sender;
206			{
207			WarningSheet(@"Nigel doesn't know how to shrink or grow this window",
208			@"Maybe you can grab the source code and have a go yourself?",
209			nil, win);
210			}
211
212	nigel	1.1	- (IBAction) Snapshot: (id) sender
213			{
214			if ( screen == nil \|\| uaeCreated == NO )
215			WarningSheet(@"The emulator has not yet started.",
216			@"There is no screen output to snapshot",
217	nigel	1.3	nil, win);
218	nigel	1.1	else
219			{
220			NSData *TIFFdata;
221
222			[self Suspend: self];
223
224			TIFFdata = [screen TIFFrep];
225			if ( TIFFdata == nil )
226			NSLog(@"%s - Unable to convert Basilisk screen to a TIFF representation",
227			__PRETTY_FUNCTION__);
228			else
229			{
230			NSSavePanel *sp = [NSSavePanel savePanel];
231
232			[sp setRequiredFileType:@"tiff"];
233
234			if ( [sp runModalForDirectory:NSHomeDirectory()
235			file:@"B2-screen-snapshot.tiff"] == NSOKButton )
236			if ( ! [TIFFdata writeToFile:[sp filename] atomically:YES] )
237			NSLog(@"%s - Could not write TIFF data to file @%",
238			__PRETTY_FUNCTION__, [sp filename]);
239
240			}
241			if ( running )
242			[self Resume: self];
243			}
244			}
245
246			- (IBAction) SpeedChange: (NSSlider *)sender
247			{
248			float frequency = [sender floatValue];
249
250			[redraw suspend];
251
252			if ( frequency == 0.0 )
253			redrawDelay = 0.0;
254			else
255			{
256			frequencyToTickDelay(frequency);
257
258			redrawDelay = 1.0 / frequency;
259
260			[redraw changeIntervalTo: (int)(redrawDelay * 1e6)
261			units: NNmicroSeconds];
262			if ( running && display_type != DISPLAY_SCREEN )
263			[redraw resume];
264			}
265			}
266
267			- (IBAction) Suspend: (id)sender
268			{
269			[RTC suspend];
270			[emul suspend];
271			[redraw suspend];
272			[tick suspend];
273			[xPRAM suspend];
274			}
275
276			- (IBAction) ToggleState: (NSButton *)sender
277			{
278			running = [sender state]; // State of the toggled NSButton
279			if ( running )
280			[self Resume: nil];
281			else
282			[self Suspend: nil];
283			}
284
285			- (IBAction) Terminate: (id)sender;
286			{
287			[self exitThreads];
288			[win performClose: self];
289			}
290
291			#include <xpram.h>
292
293			#define XPRAM_SIZE 256
294
295			uint8 lastXPRAM[XPRAM_SIZE]; // Copy of PRAM
296
297			- (IBAction) ZapPRAM: (id)sender;
298			{
299			memset(XPRAM, 0, XPRAM_SIZE);
300			memset(lastXPRAM, 0, XPRAM_SIZE);
301			ZapPRAM();
302			}
303
304			//
305			// Threads, Timers and stuff to manage them:
306			//
307
308			- (void) createThreads
309			{
310			#ifdef USE_PTHREADS
311	nigel	1.3	// Make UI threadsafe:
312			[NSThread detachNewThreadSelector:(SEL)"" toTarget:nil withObject:nil];
313	nigel	1.1	//emul = [[NNThread alloc] initWithAutoReleasePool];
314			#endif
315	nigel	1.4	emul = [NNThread new];
316			RTC = [NNTimer new];
317			redraw = [NNTimer new];
318			tick = [NNTimer new];
319			xPRAM = [NNTimer new];
320	nigel	1.1
321			[emul perform:@selector(emulThread) of:self];
322			[RTC repeat:@selector(RTCinterrupt) of:self
323			every:1
324			units:NNseconds];
325			[redraw repeat:@selector(redrawScreen) of:self
326			every:(int)(1000*redrawDelay)
327			units:NNmilliSeconds];
328			[tick repeat:@selector(tickInterrupt) of:self
329			every:16625
330			units:NNmicroSeconds];
331			[xPRAM repeat:@selector(xPRAMbackup) of:self
332			every:60
333			units:NNseconds];
334
335			if ( running ) // Start emulator, then threads in most economical order
336			{
337			[emul start];
338			[xPRAM start];
339			[RTC start];
340			if ( display_type != DISPLAY_SCREEN )
341			[redraw start];
342			[tick start];
343			}
344			}
345
346			- (void) exitThreads
347			{
348			running = NO;
349			[emul terminate]; [emul release]; emul = nil;
350			[tick invalidate]; [tick release]; tick = nil;
351			[redraw invalidate]; [redraw release]; redraw = nil;
352			[RTC invalidate]; [RTC release]; RTC = nil;
353			[xPRAM invalidate]; [xPRAM release]; xPRAM = nil;
354			if ( uaeCreated )
355			QuitEmuNoExit();
356			}
357
358			- (void) emulThread
359			{
360	nigel	1.4	NSAutoreleasePool *pool = [NSAutoreleasePool new];
361	nigel	1.1
362	nigel	1.5	if ( ! InitEmulator() )
363			{
364			[redraw suspend]; // Stop the barberpole
365	nigel	1.1
366	nigel	1.5	ErrorSheet(@"Cannot start Emulator", @"", @"Quit", win);
367			}
368	nigel	1.1	else
369			{
370			memcpy(lastXPRAM, XPRAM, XPRAM_SIZE);
371
372			uaeCreated = YES; // Enable timers to access emulated Mac's memory
373
374	nigel	1.3	while ( screen == nil ) // If we are still loading from Nib?
375	nigel	1.1	[NSThread sleepUntilDate:[NSDate dateWithTimeIntervalSinceNow: 1.0]];
376
377	nigel	1.5	[self runUpdate]; // Set the window close gadget to dimpled
378	nigel	1.1
379			Start680x0(); // Start 68k and jump to ROM boot routine
380
381			puts ("Emulator exited normally");
382			}
383
384			[pool release];
385	nigel	1.5	QuitEmulator();
386	nigel	1.1	}
387
388			- (void) RTCinterrupt
389			{
390			if ( uaeCreated )
391			WriteMacInt32 (0x20c, TimerDateTime() ); // Update MacOS time
392			}
393
394			- (void) redrawScreen
395			{
396			if ( display_type == DISPLAY_SCREEN )
397			{
398			NSLog(@"Why was redrawScreen() called?");
399			return;
400			}
401			[barberPole animate:self]; // wobble the pole
402			[screen setNeedsDisplay: YES]; // redisplay next time through runLoop
403			// Or, use a direct method. e.g.
404			// [screen cgDrawInto: ...];
405			}
406
407			#include <main.h> // For #define INTFLAG_60HZ
408			#include <rom_patches.h> // For ROMVersion
409			#include "macos_util_macosx.h" // For HasMacStarted()
410
411			- (void) tickInterrupt
412			{
413			if ( ROMVersion != ROM_VERSION_CLASSIC \|\| HasMacStarted() )
414			{
415			SetInterruptFlag (INTFLAG_60HZ);
416			TriggerInterrupt ();
417			}
418			}
419
420			- (void) xPRAMbackup
421			{
422			if ( uaeCreated &&
423			memcmp(lastXPRAM, XPRAM, XPRAM_SIZE) ) // if PRAM changed from copy
424			{
425			memcpy (lastXPRAM, XPRAM, XPRAM_SIZE); // re-copy
426			SaveXPRAM (); // and save to disk
427			}
428			}
429
430	nigel	1.2	@end