1 |
/* |
2 |
* C64_Be.h - Put the pieces together, Be specific stuff |
3 |
* |
4 |
* Frodo (C) 1994-1997,2002-2004 Christian Bauer |
5 |
* |
6 |
* This program is free software; you can redistribute it and/or modify |
7 |
* it under the terms of the GNU General Public License as published by |
8 |
* the Free Software Foundation; either version 2 of the License, or |
9 |
* (at your option) any later version. |
10 |
* |
11 |
* This program is distributed in the hope that it will be useful, |
12 |
* but WITHOUT ANY WARRANTY; without even the implied warranty of |
13 |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
14 |
* GNU General Public License for more details. |
15 |
* |
16 |
* You should have received a copy of the GNU General Public License |
17 |
* along with this program; if not, write to the Free Software |
18 |
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
19 |
*/ |
20 |
|
21 |
#include <KernelKit.h> |
22 |
#include <device/Joystick.h> |
23 |
#include <device/DigitalPort.h> |
24 |
|
25 |
#undef PROFILING |
26 |
|
27 |
|
28 |
/* |
29 |
* Constructor, system-dependent things |
30 |
*/ |
31 |
|
32 |
void C64::c64_ctor1(void) |
33 |
{ |
34 |
joy[0] = joy[1] = NULL; |
35 |
joy_geek_port[0] = joy_geek_port[1] = false; |
36 |
} |
37 |
|
38 |
void C64::c64_ctor2(void) |
39 |
{ |
40 |
// Initialize joystick variables |
41 |
joy_minx = joy_miny = 32767; |
42 |
joy_maxx = joy_maxy = 0; |
43 |
|
44 |
// Initialize semaphores (initially acquired) |
45 |
pause_sem = create_sem(0, "Frodo Pause Semaphore"); |
46 |
sound_sync_sem = create_sem(0, "Frodo Sound Sync Semaphore"); |
47 |
|
48 |
// Preset speedometer start time |
49 |
start_time = system_time(); |
50 |
} |
51 |
|
52 |
|
53 |
/* |
54 |
* Destructor, system-dependent things |
55 |
*/ |
56 |
|
57 |
void C64::c64_dtor(void) |
58 |
{ |
59 |
delete_sem(pause_sem); |
60 |
delete_sem(sound_sync_sem); |
61 |
} |
62 |
|
63 |
|
64 |
/* |
65 |
* Start main emulation thread |
66 |
*/ |
67 |
|
68 |
void C64::Run(void) |
69 |
{ |
70 |
// Reset chips |
71 |
TheCPU->Reset(); |
72 |
TheSID->Reset(); |
73 |
TheCIA1->Reset(); |
74 |
TheCIA2->Reset(); |
75 |
TheCPU1541->Reset(); |
76 |
|
77 |
// Patch kernal IEC routines |
78 |
orig_kernal_1d84 = Kernal[0x1d84]; |
79 |
orig_kernal_1d85 = Kernal[0x1d85]; |
80 |
PatchKernal(ThePrefs.FastReset, ThePrefs.Emul1541Proc); |
81 |
|
82 |
// Start the CPU thread |
83 |
the_thread = spawn_thread(thread_invoc, "Frodo 6510", B_URGENT_DISPLAY_PRIORITY, this); |
84 |
thread_running = true; |
85 |
quit_thyself = false; |
86 |
have_a_break = false; |
87 |
resume_thread(the_thread); |
88 |
} |
89 |
|
90 |
|
91 |
/* |
92 |
* Stop main emulation thread |
93 |
*/ |
94 |
|
95 |
void C64::Quit(void) |
96 |
{ |
97 |
long ret; |
98 |
|
99 |
// Ask the thread to quit itself if it is running |
100 |
if (thread_running) { |
101 |
if (have_a_break) |
102 |
Resume(); |
103 |
quit_thyself = true; |
104 |
wait_for_thread(the_thread, &ret); |
105 |
thread_running = false; |
106 |
} |
107 |
} |
108 |
|
109 |
|
110 |
/* |
111 |
* Pause main emulation thread |
112 |
*/ |
113 |
|
114 |
void C64::Pause(void) |
115 |
{ |
116 |
// Ask the thread to pause and wait for acknowledge |
117 |
if (thread_running && !have_a_break) { |
118 |
have_a_break = true; |
119 |
acquire_sem(pause_sem); |
120 |
TheSID->PauseSound(); |
121 |
} |
122 |
} |
123 |
|
124 |
|
125 |
/* |
126 |
* Resume main emulation thread |
127 |
*/ |
128 |
|
129 |
void C64::Resume(void) |
130 |
{ |
131 |
if (thread_running && have_a_break) { |
132 |
have_a_break = false; |
133 |
release_sem(pause_sem); |
134 |
TheSID->ResumeSound(); |
135 |
} |
136 |
} |
137 |
|
138 |
|
139 |
/* |
140 |
* Vertical blank: Poll keyboard and joysticks, update window |
141 |
*/ |
142 |
|
143 |
void C64::VBlank(bool draw_frame) |
144 |
{ |
145 |
bigtime_t elapsed_time; |
146 |
long speed_index; |
147 |
|
148 |
// To avoid deadlocks on quitting |
149 |
if (quit_thyself) return; |
150 |
|
151 |
// Pause requested? |
152 |
if (have_a_break) { |
153 |
release_sem(pause_sem); // Acknowledge pause |
154 |
acquire_sem(pause_sem); // Wait for resume |
155 |
} |
156 |
|
157 |
// Poll keyboard |
158 |
TheDisplay->PollKeyboard(TheCIA1->KeyMatrix, TheCIA1->RevMatrix, &joykey); |
159 |
|
160 |
// Poll joysticks |
161 |
TheCIA1->Joystick1 = poll_joystick(0); |
162 |
TheCIA1->Joystick2 = poll_joystick(1); |
163 |
|
164 |
if (ThePrefs.JoystickSwap) { |
165 |
uint8 tmp = TheCIA1->Joystick1; |
166 |
TheCIA1->Joystick1 = TheCIA1->Joystick2; |
167 |
TheCIA1->Joystick2 = tmp; |
168 |
} |
169 |
|
170 |
// Joystick keyboard emulation |
171 |
if (TheDisplay->NumLock()) |
172 |
TheCIA1->Joystick1 &= joykey; |
173 |
else |
174 |
TheCIA1->Joystick2 &= joykey; |
175 |
|
176 |
// Count TOD clocks |
177 |
TheCIA1->CountTOD(); |
178 |
TheCIA2->CountTOD(); |
179 |
|
180 |
// Update window if needed |
181 |
if (draw_frame) { |
182 |
TheDisplay->Update(); |
183 |
|
184 |
// Calculate time between VBlanks, display speedometer |
185 |
elapsed_time = system_time() - start_time; |
186 |
speed_index = 20000 * 100 * ThePrefs.SkipFrames / (elapsed_time + 1); |
187 |
|
188 |
// Limit speed to 100% if desired (20ms/frame) |
189 |
// If the SID emulation is on and no frames are skipped, synchronize to the SID |
190 |
if (ThePrefs.LimitSpeed && speed_index > 100) { |
191 |
if (ThePrefs.SIDType == SIDTYPE_DIGITAL && ThePrefs.SkipFrames == 1) { |
192 |
long l; |
193 |
get_sem_count(sound_sync_sem, &l); |
194 |
if (l > 0) // Avoid C64 lagging behind |
195 |
acquire_sem_etc(sound_sync_sem, l+1, 0, 0); |
196 |
else |
197 |
acquire_sem(sound_sync_sem); |
198 |
} else |
199 |
snooze(ThePrefs.SkipFrames * 20000 - elapsed_time); |
200 |
speed_index = 100; |
201 |
} |
202 |
|
203 |
start_time = system_time(); |
204 |
|
205 |
TheDisplay->Speedometer(speed_index); |
206 |
} |
207 |
} |
208 |
|
209 |
|
210 |
/* |
211 |
* Called by SID after playing 1/50 sec of sound |
212 |
*/ |
213 |
|
214 |
void C64::SoundSync(void) |
215 |
{ |
216 |
release_sem(sound_sync_sem); |
217 |
} |
218 |
|
219 |
|
220 |
/* |
221 |
* Open/close joystick drivers given old and new state of |
222 |
* joystick preferences |
223 |
*/ |
224 |
|
225 |
void C64::open_close_joystick(int port, int oldjoy, int newjoy) |
226 |
{ |
227 |
if (oldjoy != newjoy) { |
228 |
joy_minx = joy_miny = 32767; // Reset calibration |
229 |
joy_maxx = joy_maxy = 0; |
230 |
if (joy[port]) { |
231 |
if (joy_geek_port[port]) { |
232 |
((BDigitalPort *)joy[port])->Close(); |
233 |
delete (BDigitalPort *)joy[port]; |
234 |
} else { |
235 |
((BJoystick *)joy[port])->Close(); |
236 |
delete (BJoystick *)joy[port]; |
237 |
} |
238 |
joy[port] = NULL; |
239 |
} |
240 |
switch (newjoy) { |
241 |
case 1: |
242 |
joy[port] = new BJoystick; |
243 |
((BJoystick *)joy[port])->Open("joystick1"); |
244 |
joy_geek_port[port] = false; |
245 |
break; |
246 |
case 2: |
247 |
joy[port] = new BJoystick; |
248 |
((BJoystick *)joy[port])->Open("joystick2"); |
249 |
joy_geek_port[port] = false; |
250 |
break; |
251 |
case 3: |
252 |
joy[port] = new BDigitalPort; |
253 |
((BDigitalPort *)joy[port])->Open("DigitalA"); |
254 |
joy_geek_port[port] = true; |
255 |
break; |
256 |
case 4: |
257 |
joy[port] = new BDigitalPort; |
258 |
((BDigitalPort *)joy[port])->Open("DigitalB"); |
259 |
joy_geek_port[port] = true; |
260 |
break; |
261 |
} |
262 |
} |
263 |
} |
264 |
|
265 |
void C64::open_close_joysticks(int oldjoy1, int oldjoy2, int newjoy1, int newjoy2) |
266 |
{ |
267 |
open_close_joystick(0, oldjoy1, newjoy1); |
268 |
open_close_joystick(1, oldjoy2, newjoy2); |
269 |
} |
270 |
|
271 |
|
272 |
/* |
273 |
* Poll joystick port, return CIA mask |
274 |
*/ |
275 |
|
276 |
uint8 C64::poll_joystick(int port) |
277 |
{ |
278 |
uint8 j = 0xff; |
279 |
|
280 |
if (joy[port] == NULL) |
281 |
return j; |
282 |
|
283 |
if (joy_geek_port[port]) { |
284 |
|
285 |
// GeekPort |
286 |
uint8 val; |
287 |
if (((BDigitalPort *)joy[port])->Read(&val) == 1) |
288 |
j = val | 0xe0; |
289 |
|
290 |
} else { |
291 |
|
292 |
// Joystick port |
293 |
BJoystick *p = (BJoystick *)joy[port]; |
294 |
if (p->Update() != B_ERROR) { |
295 |
if (p->horizontal > joy_maxx) |
296 |
joy_maxx = p->horizontal; |
297 |
if (p->horizontal < joy_minx) |
298 |
joy_minx = p->horizontal; |
299 |
if (p->vertical > joy_maxy) |
300 |
joy_maxy = p->vertical; |
301 |
if (p->vertical < joy_miny) |
302 |
joy_miny = p->vertical; |
303 |
|
304 |
if (!p->button1) |
305 |
j &= 0xef; // Button |
306 |
|
307 |
if (joy_maxx-joy_minx < 100 || joy_maxy-joy_miny < 100) |
308 |
return j; |
309 |
|
310 |
if (p->horizontal < (joy_minx + (joy_maxx-joy_minx)/3)) |
311 |
j &= 0xf7; // Right |
312 |
else if (p->horizontal > (joy_minx + 2*(joy_maxx-joy_minx)/3)) |
313 |
j &= 0xfb; // Left |
314 |
|
315 |
if (p->vertical < (joy_miny + (joy_maxy-joy_miny)/3)) |
316 |
j &= 0xfd; // Down |
317 |
else if (p->vertical > (joy_miny + 2*(joy_maxy-joy_miny)/3)) |
318 |
j &= 0xfe; // Up |
319 |
} |
320 |
} |
321 |
return j; |
322 |
} |
323 |
|
324 |
|
325 |
/* |
326 |
* The emulation's main loop |
327 |
*/ |
328 |
|
329 |
long C64::thread_invoc(void *obj) |
330 |
{ |
331 |
((C64 *)obj)->thread_func(); |
332 |
return 0; |
333 |
} |
334 |
|
335 |
void C64::thread_func(void) |
336 |
{ |
337 |
#ifdef PROFILING |
338 |
static bigtime_t vic_time_acc = 0; |
339 |
static bigtime_t sid_time_acc = 0; |
340 |
static bigtime_t cia_time_acc = 0; |
341 |
static bigtime_t cpu_time_acc = 0; |
342 |
#endif |
343 |
#ifdef FRODO_SC |
344 |
while (!quit_thyself) { |
345 |
// The order of calls is important here |
346 |
if (TheVIC->EmulateCycle()) |
347 |
TheSID->EmulateLine(); |
348 |
TheCIA1->CheckIRQs(); |
349 |
TheCIA2->CheckIRQs(); |
350 |
TheCIA1->EmulateCycle(); |
351 |
TheCIA2->EmulateCycle(); |
352 |
TheCPU->EmulateCycle(); |
353 |
|
354 |
if (ThePrefs.Emul1541Proc) { |
355 |
TheCPU1541->CountVIATimers(1); |
356 |
if (!TheCPU1541->Idle) |
357 |
TheCPU1541->EmulateCycle(); |
358 |
} |
359 |
CycleCounter++; |
360 |
#else |
361 |
while (!quit_thyself) { |
362 |
// The order of calls is important here |
363 |
#ifdef PROFILING |
364 |
bigtime_t start_time = system_time(); |
365 |
#endif |
366 |
int cycles = TheVIC->EmulateLine(); |
367 |
#ifdef PROFILING |
368 |
bigtime_t vic_time = system_time(); |
369 |
#endif |
370 |
TheSID->EmulateLine(); |
371 |
#ifdef PROFILING |
372 |
bigtime_t sid_time = system_time(); |
373 |
#endif |
374 |
#if !PRECISE_CIA_CYCLES |
375 |
TheCIA1->EmulateLine(ThePrefs.CIACycles); |
376 |
TheCIA2->EmulateLine(ThePrefs.CIACycles); |
377 |
#endif |
378 |
#ifdef PROFILING |
379 |
bigtime_t cia_time = system_time(); |
380 |
#endif |
381 |
|
382 |
if (ThePrefs.Emul1541Proc) { |
383 |
int cycles_1541 = ThePrefs.FloppyCycles; |
384 |
TheCPU1541->CountVIATimers(cycles_1541); |
385 |
|
386 |
if (!TheCPU1541->Idle) { |
387 |
// 1541 processor active, alternately execute |
388 |
// 6502 and 6510 instructions until both have |
389 |
// used up their cycles |
390 |
while (cycles >= 0 || cycles_1541 >= 0) |
391 |
if (cycles > cycles_1541) |
392 |
cycles -= TheCPU->EmulateLine(1); |
393 |
else |
394 |
cycles_1541 -= TheCPU1541->EmulateLine(1); |
395 |
} else |
396 |
TheCPU->EmulateLine(cycles); |
397 |
} else |
398 |
// 1541 processor disabled, only emulate 6510 |
399 |
TheCPU->EmulateLine(cycles); |
400 |
#ifdef PROFILING |
401 |
bigtime_t cpu_time = system_time(); |
402 |
vic_time_acc += vic_time - start_time; |
403 |
sid_time_acc += sid_time - vic_time; |
404 |
cia_time_acc += cia_time - sid_time; |
405 |
cpu_time_acc += cpu_time - cia_time; |
406 |
#endif |
407 |
|
408 |
#endif |
409 |
} |
410 |
|
411 |
#ifdef PROFILING |
412 |
bigtime_t total_time = vic_time_acc + sid_time_acc + cia_time_acc + cpu_time_acc; |
413 |
printf("VIC: %Ld\n", vic_time_acc * 100 / total_time); |
414 |
printf("SID: %Ld\n", sid_time_acc * 100 / total_time); |
415 |
printf("CIA: %Ld\n", cia_time_acc * 100 / total_time); |
416 |
printf("CPU: %Ld\n", cpu_time_acc * 100 / total_time); |
417 |
#endif |
418 |
} |