1 |
/* |
2 |
* C64_WIN32.h - Put the pieces together, WIN32 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 <process.h> |
22 |
#include "main.h" |
23 |
|
24 |
#define FRAME_INTERVAL (1000/SCREEN_FREQ) // in milliseconds |
25 |
#ifdef FRODO_SC |
26 |
#define SPEEDOMETER_INTERVAL 4000 // in milliseconds |
27 |
#else |
28 |
#define SPEEDOMETER_INTERVAL 1000 // in milliseconds |
29 |
#endif |
30 |
#define JOYSTICK_SENSITIVITY 40 // % of live range |
31 |
#define JOYSTICK_MIN 0x0000 // min value of range |
32 |
#define JOYSTICK_MAX 0xffff // max value of range |
33 |
#define JOYSTICK_RANGE (JOYSTICK_MAX - JOYSTICK_MIN) |
34 |
|
35 |
static BOOL high_resolution_timer = FALSE; |
36 |
|
37 |
/* |
38 |
* Constructor, system-dependent things |
39 |
*/ |
40 |
|
41 |
void C64::c64_ctor1() |
42 |
{ |
43 |
Debug("C64::c64_ctor1\n"); |
44 |
|
45 |
// Initialize joystick variables. |
46 |
joy_state = 0xff; |
47 |
|
48 |
// No need to check for state change. |
49 |
state_change = FALSE; |
50 |
|
51 |
// Start the synchronization timer. |
52 |
timer_semaphore = NULL; |
53 |
timer_id = NULL; |
54 |
StartTimer(); |
55 |
} |
56 |
|
57 |
void C64::c64_ctor2() |
58 |
{ |
59 |
Debug("C64::c64_ctor2\n"); |
60 |
} |
61 |
|
62 |
|
63 |
/* |
64 |
* Destructor, system-dependent things |
65 |
*/ |
66 |
|
67 |
void C64::c64_dtor() |
68 |
{ |
69 |
Debug("C64::c64_dtor\n"); |
70 |
|
71 |
StopTimer(); |
72 |
} |
73 |
|
74 |
|
75 |
/* |
76 |
* Start emulation |
77 |
*/ |
78 |
|
79 |
void C64::Run() |
80 |
{ |
81 |
// Reset chips |
82 |
TheCPU->Reset(); |
83 |
TheSID->Reset(); |
84 |
TheCIA1->Reset(); |
85 |
TheCIA2->Reset(); |
86 |
TheCPU1541->Reset(); |
87 |
|
88 |
// Patch kernal IEC routines |
89 |
orig_kernal_1d84 = Kernal[0x1d84]; |
90 |
orig_kernal_1d85 = Kernal[0x1d85]; |
91 |
patch_kernal(ThePrefs.FastReset, ThePrefs.Emul1541Proc); |
92 |
|
93 |
// Start the CPU thread |
94 |
thread_func(); |
95 |
} |
96 |
|
97 |
|
98 |
/* |
99 |
* Stop emulation |
100 |
*/ |
101 |
|
102 |
void C64::Quit() |
103 |
{ |
104 |
// Ask the thread to quit itself if it is running |
105 |
quit_thyself = TRUE; |
106 |
state_change = TRUE; |
107 |
} |
108 |
|
109 |
|
110 |
/* |
111 |
* Pause emulation |
112 |
*/ |
113 |
|
114 |
void C64::Pause() |
115 |
{ |
116 |
StopTimer(); |
117 |
TheSID->PauseSound(); |
118 |
have_a_break = TRUE; |
119 |
state_change = TRUE; |
120 |
} |
121 |
|
122 |
|
123 |
/* |
124 |
* Resume emulation |
125 |
*/ |
126 |
|
127 |
void C64::Resume() |
128 |
{ |
129 |
StartTimer(); |
130 |
TheSID->ResumeSound(); |
131 |
have_a_break = FALSE; |
132 |
} |
133 |
|
134 |
|
135 |
/* |
136 |
* Vertical blank: Poll keyboard and joysticks, update window |
137 |
*/ |
138 |
|
139 |
void C64::VBlank(bool draw_frame) |
140 |
{ |
141 |
//Debug("C64::VBlank\n"); |
142 |
|
143 |
// Poll the keyboard. |
144 |
TheDisplay->PollKeyboard(TheCIA1->KeyMatrix, TheCIA1->RevMatrix, &joykey); |
145 |
// Poll the joysticks. |
146 |
TheCIA1->Joystick1 = poll_joystick(0); |
147 |
TheCIA1->Joystick2 = poll_joystick(1); |
148 |
|
149 |
if (ThePrefs.JoystickSwap) { |
150 |
uint8 tmp = TheCIA1->Joystick1; |
151 |
TheCIA1->Joystick1 = TheCIA1->Joystick2; |
152 |
TheCIA1->Joystick2 = tmp; |
153 |
} |
154 |
|
155 |
// Joystick keyboard emulation. |
156 |
if (TheDisplay->NumLock()) |
157 |
TheCIA1->Joystick1 &= joykey; |
158 |
else |
159 |
TheCIA1->Joystick2 &= joykey; |
160 |
|
161 |
// Count TOD clocks. |
162 |
TheCIA1->CountTOD(); |
163 |
TheCIA2->CountTOD(); |
164 |
|
165 |
#if 1 |
166 |
// Output a frag. |
167 |
TheSID->VBlank(); |
168 |
#endif |
169 |
|
170 |
if (have_a_break) |
171 |
return; |
172 |
|
173 |
// Update the window if needed. |
174 |
frame++; |
175 |
if (draw_frame) { |
176 |
|
177 |
// Synchronize to the timer if limiting the speed. |
178 |
if (ThePrefs.LimitSpeed) { |
179 |
if (skipped_frames == 0) { |
180 |
// There is a tiny race condtion here that |
181 |
// could cause a full extra delay cycle. |
182 |
WaitForSingleObject(timer_semaphore, INFINITE); |
183 |
} |
184 |
else { |
185 |
Debug("*** Skipped a frame! ***\n"); |
186 |
skipped_frames = 0; |
187 |
} |
188 |
} |
189 |
|
190 |
// Perform the actual screen update exactly at the |
191 |
// beginning of an interval for the smoothest video. |
192 |
TheDisplay->Update(); |
193 |
|
194 |
// Compute the speed index and show it in the speedometer. |
195 |
DWORD now = timeGetTime(); |
196 |
int elapsed_time = now - ref_time; |
197 |
if (now - ref_time >= SPEEDOMETER_INTERVAL) { |
198 |
double speed_index = double(frame * FRAME_INTERVAL * 100 + elapsed_time/2) / elapsed_time; |
199 |
TheDisplay->Speedometer((int)speed_index); |
200 |
ref_time = now; |
201 |
frame = 0; |
202 |
} |
203 |
|
204 |
// Make sure our timer is set correctly. |
205 |
CheckTimerChange(); |
206 |
} |
207 |
} |
208 |
|
209 |
|
210 |
void C64::CheckTimerChange() |
211 |
{ |
212 |
// Make sure the timer interval matches the preferences. |
213 |
if (!ThePrefs.LimitSpeed && timer_every == 0) |
214 |
return; |
215 |
if (ThePrefs.LimitSpeed && ThePrefs.SkipFrames == timer_every) |
216 |
return; |
217 |
StopTimer(); |
218 |
StartTimer(); |
219 |
} |
220 |
|
221 |
/* |
222 |
* Open/close joystick drivers given old and new state of |
223 |
* joystick preferences |
224 |
*/ |
225 |
|
226 |
BOOL joystick_open[2]; |
227 |
|
228 |
void C64::open_close_joysticks(int oldjoy1, int oldjoy2, int newjoy1, int newjoy2) |
229 |
{ |
230 |
if (oldjoy1 != newjoy1) { |
231 |
joystick_open[0] = FALSE; |
232 |
if (newjoy1) { |
233 |
JOYINFO joyinfo; |
234 |
if (joyGetPos(0, &joyinfo) == JOYERR_NOERROR) |
235 |
joystick_open[0] = TRUE; |
236 |
} |
237 |
} |
238 |
|
239 |
if (oldjoy2 != newjoy2) { |
240 |
joystick_open[1] = FALSE; |
241 |
if (newjoy1) { |
242 |
JOYINFO joyinfo; |
243 |
if (joyGetPos(1, &joyinfo) == JOYERR_NOERROR) |
244 |
joystick_open[1] = TRUE; |
245 |
} |
246 |
} |
247 |
|
248 |
// XXX: Should have our own new prefs! |
249 |
state_change = TRUE; |
250 |
} |
251 |
|
252 |
|
253 |
/* |
254 |
* Poll joystick port, return CIA mask |
255 |
*/ |
256 |
|
257 |
uint8 C64::poll_joystick(int port) |
258 |
{ |
259 |
uint8 j = 0xff; |
260 |
|
261 |
if (joystick_open[port]) { |
262 |
JOYINFO joyinfo; |
263 |
if (joyGetPos(port, &joyinfo) == JOYERR_NOERROR) { |
264 |
int x = joyinfo.wXpos; |
265 |
int y = joyinfo.wYpos; |
266 |
int buttons = joyinfo.wButtons; |
267 |
int s1 = JOYSTICK_SENSITIVITY; |
268 |
int s2 = 100 - JOYSTICK_SENSITIVITY; |
269 |
if (x < JOYSTICK_MIN + s1*JOYSTICK_RANGE/100) |
270 |
j &= 0xfb; // Left |
271 |
else if (x > JOYSTICK_MIN + s2*JOYSTICK_RANGE/100) |
272 |
j &= 0xf7; // Right |
273 |
if (y < JOYSTICK_MIN + s1*JOYSTICK_RANGE/100) |
274 |
j &= 0xfe; // Up |
275 |
else if (y > JOYSTICK_MIN + s2*JOYSTICK_RANGE/100) |
276 |
j &= 0xfd; // Down |
277 |
if (buttons & 1) |
278 |
j &= 0xef; // Button |
279 |
if (buttons & 2) { |
280 |
Pause(); |
281 |
while (joyGetPos(port, &joyinfo) == JOYERR_NOERROR && (joyinfo.wButtons & 2)) |
282 |
Sleep(100); |
283 |
Resume(); |
284 |
} |
285 |
} |
286 |
} |
287 |
|
288 |
return j; |
289 |
} |
290 |
|
291 |
void C64::StartTimer() |
292 |
{ |
293 |
ref_time = timeGetTime(); |
294 |
skipped_frames = 0; |
295 |
frame = 0; |
296 |
|
297 |
if (!ThePrefs.LimitSpeed) { |
298 |
timer_every = 0; |
299 |
StopTimer(); |
300 |
return; |
301 |
} |
302 |
timer_every = ThePrefs.SkipFrames; |
303 |
|
304 |
if (!timer_semaphore) { |
305 |
timer_semaphore = CreateSemaphore(NULL, 0, 1, NULL); |
306 |
if (!timer_semaphore) |
307 |
Debug("CreateSemaphore failed\n"); |
308 |
} |
309 |
|
310 |
if (!timer_id) { |
311 |
|
312 |
// Turn on high-resolution times and delays. |
313 |
int resolution = FRAME_INTERVAL; |
314 |
if (high_resolution_timer) { |
315 |
timeBeginPeriod(1); |
316 |
resolution = 0; |
317 |
} |
318 |
|
319 |
timer_id = timeSetEvent(timer_every*FRAME_INTERVAL, resolution, StaticTimeProc, (DWORD) this, TIME_PERIODIC); |
320 |
if (!timer_id) |
321 |
Debug("timeSetEvent failed\n"); |
322 |
} |
323 |
} |
324 |
|
325 |
void C64::StopTimer() |
326 |
{ |
327 |
if (timer_semaphore) { |
328 |
CloseHandle(timer_semaphore); |
329 |
timer_semaphore = NULL; |
330 |
} |
331 |
if (timer_id) { |
332 |
timeKillEvent(timer_id); |
333 |
timer_id = NULL; |
334 |
|
335 |
// Turn off high-resolution delays. |
336 |
if (high_resolution_timer) |
337 |
timeEndPeriod(1); |
338 |
} |
339 |
|
340 |
} |
341 |
|
342 |
void CALLBACK C64::StaticTimeProc(UINT uID, UINT uMsg, DWORD dwUser, DWORD dw1, DWORD dw2) |
343 |
{ |
344 |
C64* TheC64 = (C64 *) dwUser; |
345 |
TheC64->TimeProc(uID); |
346 |
} |
347 |
|
348 |
void C64::TimeProc(UINT id) |
349 |
{ |
350 |
if (id != timer_id) { |
351 |
Debug("TimeProc called for wrong timer id!\n"); |
352 |
timeKillEvent(id); |
353 |
return; |
354 |
} |
355 |
|
356 |
if (!ReleaseSemaphore(timer_semaphore, 1, NULL)) |
357 |
skipped_frames++; |
358 |
} |
359 |
|
360 |
|
361 |
/* |
362 |
* The emulation's main loop |
363 |
*/ |
364 |
|
365 |
void C64::thread_func() |
366 |
{ |
367 |
Debug("C64::thread_func\n"); |
368 |
|
369 |
thread_running = TRUE; |
370 |
|
371 |
while (!quit_thyself) { |
372 |
|
373 |
if (have_a_break) |
374 |
TheDisplay->WaitUntilActive(); |
375 |
|
376 |
#ifdef FRODO_SC |
377 |
if (ThePrefs.Emul1541Proc) |
378 |
EmulateCyclesWith1541(); |
379 |
else |
380 |
EmulateCyclesWithout1541(); |
381 |
state_change = FALSE; |
382 |
#else |
383 |
// The order of calls is important here |
384 |
int cycles = TheVIC->EmulateLine(); |
385 |
TheSID->EmulateLine(); |
386 |
#if !PRECISE_CIA_CYCLES |
387 |
TheCIA1->EmulateLine(ThePrefs.CIACycles); |
388 |
TheCIA2->EmulateLine(ThePrefs.CIACycles); |
389 |
#endif |
390 |
if (ThePrefs.Emul1541Proc) { |
391 |
int cycles_1541 = ThePrefs.FloppyCycles; |
392 |
TheCPU1541->CountVIATimers(cycles_1541); |
393 |
|
394 |
if (!TheCPU1541->Idle) { |
395 |
// 1541 processor active, alternately execute |
396 |
// 6502 and 6510 instructions until both have |
397 |
// used up their cycles |
398 |
while (cycles >= 0 || cycles_1541 >= 0) |
399 |
if (cycles > cycles_1541) |
400 |
cycles -= TheCPU->EmulateLine(1); |
401 |
else |
402 |
cycles_1541 -= TheCPU1541->EmulateLine(1); |
403 |
} else |
404 |
TheCPU->EmulateLine(cycles); |
405 |
} else |
406 |
// 1541 processor disabled, only emulate 6510 |
407 |
TheCPU->EmulateLine(cycles); |
408 |
#endif |
409 |
} |
410 |
|
411 |
thread_running = FALSE; |
412 |
|
413 |
} |
414 |
|
415 |
#ifdef FRODO_SC |
416 |
|
417 |
void C64::EmulateCyclesWith1541() |
418 |
{ |
419 |
thread_running = TRUE; |
420 |
while (!state_change) { |
421 |
// The order of calls is important here |
422 |
if (TheVIC->EmulateCycle()) |
423 |
TheSID->EmulateLine(); |
424 |
#ifndef BATCH_CIA_CYCLES |
425 |
TheCIA1->EmulateCycle(); |
426 |
TheCIA2->EmulateCycle(); |
427 |
#endif |
428 |
TheCPU->EmulateCycle(); |
429 |
TheCPU1541->CountVIATimers(1); |
430 |
if (!TheCPU1541->Idle) |
431 |
TheCPU1541->EmulateCycle(); |
432 |
CycleCounter++; |
433 |
} |
434 |
} |
435 |
|
436 |
void C64::EmulateCyclesWithout1541() |
437 |
{ |
438 |
thread_running = TRUE; |
439 |
while (!state_change) { |
440 |
// The order of calls is important here |
441 |
if (TheVIC->EmulateCycle()) |
442 |
TheSID->EmulateLine(); |
443 |
#ifndef BATCH_CIA_CYCLES |
444 |
TheCIA1->EmulateCycle(); |
445 |
TheCIA2->EmulateCycle(); |
446 |
#endif |
447 |
TheCPU->EmulateCycle(); |
448 |
CycleCounter++; |
449 |
} |
450 |
} |
451 |
|
452 |
#endif |