1 |
cebix |
1.1 |
/* |
2 |
|
|
* C64_Amiga.h - Put the pieces together, Amiga specific stuff |
3 |
|
|
* |
4 |
|
|
* Frodo (C) 1994-1997,2002 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 <proto/exec.h> |
22 |
|
|
#include <proto/timer.h> |
23 |
|
|
|
24 |
|
|
|
25 |
|
|
// Library bases |
26 |
|
|
struct Device *TimerBase; |
27 |
|
|
|
28 |
|
|
|
29 |
|
|
/* |
30 |
|
|
* Constructor, system-dependent things |
31 |
|
|
*/ |
32 |
|
|
|
33 |
|
|
void C64::c64_ctor1(void) |
34 |
|
|
{ |
35 |
|
|
// Open game_io |
36 |
|
|
game_port = CreateMsgPort(); |
37 |
|
|
game_io = (struct IOStdReq *)CreateIORequest(game_port, sizeof(IOStdReq)); |
38 |
|
|
game_io->io_Message.mn_Node.ln_Type = NT_UNKNOWN; |
39 |
|
|
game_open = port_allocated = false; |
40 |
|
|
if (!OpenDevice("gameport.device", 1, (struct IORequest *)game_io, 0)) |
41 |
|
|
game_open = true; |
42 |
|
|
} |
43 |
|
|
|
44 |
|
|
void C64::c64_ctor2(void) |
45 |
|
|
{ |
46 |
|
|
// Initialize joystick variables |
47 |
|
|
joy_state = 0xff; |
48 |
|
|
|
49 |
|
|
// Open timer_io |
50 |
|
|
timer_port = CreateMsgPort(); |
51 |
|
|
timer_io = (struct timerequest *)CreateIORequest(timer_port, sizeof(struct timerequest)); |
52 |
|
|
OpenDevice(TIMERNAME, UNIT_MICROHZ, (struct IORequest *)timer_io, 0); |
53 |
|
|
|
54 |
|
|
// Get timer base |
55 |
|
|
TimerBase = timer_io->tr_node.io_Device; |
56 |
|
|
|
57 |
|
|
// Preset speedometer start time |
58 |
|
|
GetSysTime(&start_time); |
59 |
|
|
} |
60 |
|
|
|
61 |
|
|
|
62 |
|
|
/* |
63 |
|
|
* Destructor, system-dependent things |
64 |
|
|
*/ |
65 |
|
|
|
66 |
|
|
void C64::c64_dtor(void) |
67 |
|
|
{ |
68 |
|
|
// Stop and delete timer_io |
69 |
|
|
if (timer_io != NULL) { |
70 |
|
|
if (!CheckIO((struct IORequest *)timer_io)) |
71 |
|
|
WaitIO((struct IORequest *)timer_io); |
72 |
|
|
CloseDevice((struct IORequest *)timer_io); |
73 |
|
|
DeleteIORequest((struct IORequest *)timer_io); |
74 |
|
|
} |
75 |
|
|
|
76 |
|
|
if (timer_port != NULL) |
77 |
|
|
DeleteMsgPort(timer_port); |
78 |
|
|
|
79 |
|
|
if (game_open) { |
80 |
|
|
if (!CheckIO((struct IORequest *)game_io)) { |
81 |
|
|
AbortIO((struct IORequest *)game_io); |
82 |
|
|
WaitIO((struct IORequest *)game_io); |
83 |
|
|
} |
84 |
|
|
CloseDevice((struct IORequest *)game_io); |
85 |
|
|
} |
86 |
|
|
|
87 |
|
|
if (game_io != NULL) |
88 |
|
|
DeleteIORequest((struct IORequest *)game_io); |
89 |
|
|
|
90 |
|
|
if (game_port != NULL) |
91 |
|
|
DeleteMsgPort(game_port); |
92 |
|
|
} |
93 |
|
|
|
94 |
|
|
|
95 |
|
|
/* |
96 |
|
|
* Start emulation |
97 |
|
|
*/ |
98 |
|
|
|
99 |
|
|
void C64::Run(void) |
100 |
|
|
{ |
101 |
|
|
// Reset chips |
102 |
|
|
TheCPU->Reset(); |
103 |
|
|
TheSID->Reset(); |
104 |
|
|
TheCIA1->Reset(); |
105 |
|
|
TheCIA2->Reset(); |
106 |
|
|
TheCPU1541->Reset(); |
107 |
|
|
|
108 |
|
|
// Patch kernal IEC routines |
109 |
|
|
orig_kernal_1d84 = Kernal[0x1d84]; |
110 |
|
|
orig_kernal_1d85 = Kernal[0x1d85]; |
111 |
|
|
PatchKernal(ThePrefs.FastReset, ThePrefs.Emul1541Proc); |
112 |
|
|
|
113 |
|
|
// Start timer_io |
114 |
|
|
timer_io->tr_node.io_Command = TR_ADDREQUEST; |
115 |
|
|
timer_io->tr_time.tv_secs = 0; |
116 |
|
|
timer_io->tr_time.tv_micro = ThePrefs.SkipFrames * 20000; // 20ms per frame |
117 |
|
|
SendIO((struct IORequest *)timer_io); |
118 |
|
|
|
119 |
|
|
// Start the CPU thread |
120 |
|
|
thread_running = true; |
121 |
|
|
quit_thyself = false; |
122 |
|
|
have_a_break = false; |
123 |
|
|
thread_func(); |
124 |
|
|
} |
125 |
|
|
|
126 |
|
|
|
127 |
|
|
/* |
128 |
|
|
* Stop emulation |
129 |
|
|
*/ |
130 |
|
|
|
131 |
|
|
void C64::Quit(void) |
132 |
|
|
{ |
133 |
|
|
// Ask the thread to quit itself if it is running |
134 |
|
|
if (thread_running) { |
135 |
|
|
quit_thyself = true; |
136 |
|
|
thread_running = false; |
137 |
|
|
} |
138 |
|
|
} |
139 |
|
|
|
140 |
|
|
|
141 |
|
|
/* |
142 |
|
|
* Pause emulation |
143 |
|
|
*/ |
144 |
|
|
|
145 |
|
|
void C64::Pause(void) |
146 |
|
|
{ |
147 |
|
|
TheSID->PauseSound(); |
148 |
|
|
} |
149 |
|
|
|
150 |
|
|
|
151 |
|
|
/* |
152 |
|
|
* Resume emulation |
153 |
|
|
*/ |
154 |
|
|
|
155 |
|
|
void C64::Resume(void) |
156 |
|
|
{ |
157 |
|
|
TheSID->ResumeSound(); |
158 |
|
|
} |
159 |
|
|
|
160 |
|
|
|
161 |
|
|
/* |
162 |
|
|
* Vertical blank: Poll keyboard and joysticks, update window |
163 |
|
|
*/ |
164 |
|
|
|
165 |
|
|
void C64::VBlank(bool draw_frame) |
166 |
|
|
{ |
167 |
|
|
struct timeval end_time; |
168 |
|
|
long speed_index; |
169 |
|
|
|
170 |
|
|
// Poll keyboard |
171 |
|
|
TheDisplay->PollKeyboard(TheCIA1->KeyMatrix, TheCIA1->RevMatrix, &joykey); |
172 |
|
|
|
173 |
|
|
// Poll joysticks |
174 |
|
|
TheCIA1->Joystick1 = poll_joystick(0); |
175 |
|
|
TheCIA1->Joystick2 = poll_joystick(1); |
176 |
|
|
|
177 |
|
|
if (ThePrefs.JoystickSwap) { |
178 |
|
|
uint8 tmp = TheCIA1->Joystick1; |
179 |
|
|
TheCIA1->Joystick1 = TheCIA1->Joystick2; |
180 |
|
|
TheCIA1->Joystick2 = tmp; |
181 |
|
|
} |
182 |
|
|
|
183 |
|
|
// Joystick keyboard emulation |
184 |
|
|
if (TheDisplay->NumLock()) |
185 |
|
|
TheCIA1->Joystick1 &= joykey; |
186 |
|
|
else |
187 |
|
|
TheCIA1->Joystick2 &= joykey; |
188 |
|
|
|
189 |
|
|
// Count TOD clocks |
190 |
|
|
TheCIA1->CountTOD(); |
191 |
|
|
TheCIA2->CountTOD(); |
192 |
|
|
|
193 |
|
|
// Update window if needed |
194 |
|
|
if (draw_frame) { |
195 |
|
|
TheDisplay->Update(); |
196 |
|
|
|
197 |
|
|
// Calculate time between VBlanks, display speedometer |
198 |
|
|
GetSysTime(&end_time); |
199 |
|
|
SubTime(&end_time, &start_time); |
200 |
|
|
speed_index = 20000 * 100 * ThePrefs.SkipFrames / (end_time.tv_micro + 1); |
201 |
|
|
|
202 |
|
|
// Abort timer_io if speed limiter is off |
203 |
|
|
if (!ThePrefs.LimitSpeed) { |
204 |
|
|
if (!CheckIO((struct IORequest *)timer_io)) |
205 |
|
|
AbortIO((struct IORequest *)timer_io); |
206 |
|
|
} else if (speed_index > 100) |
207 |
|
|
speed_index = 100; |
208 |
|
|
|
209 |
|
|
// Wait for timer_io (limit speed) |
210 |
|
|
WaitIO((struct IORequest *)timer_io); |
211 |
|
|
|
212 |
|
|
// Restart timer_io |
213 |
|
|
timer_io->tr_node.io_Command = TR_ADDREQUEST; |
214 |
|
|
timer_io->tr_time.tv_secs = 0; |
215 |
|
|
timer_io->tr_time.tv_micro = ThePrefs.SkipFrames * 20000; // 20ms per frame |
216 |
|
|
SendIO((struct IORequest *)timer_io); |
217 |
|
|
|
218 |
|
|
GetSysTime(&start_time); |
219 |
|
|
|
220 |
|
|
TheDisplay->Speedometer(speed_index); |
221 |
|
|
} |
222 |
|
|
} |
223 |
|
|
|
224 |
|
|
|
225 |
|
|
/* |
226 |
|
|
* Open/close joystick drivers given old and new state of |
227 |
|
|
* joystick preferences |
228 |
|
|
*/ |
229 |
|
|
|
230 |
|
|
void C64::open_close_joysticks(bool oldjoy1, bool oldjoy2, bool newjoy1, bool newjoy2) |
231 |
|
|
{ |
232 |
|
|
if (game_open && (oldjoy2 != newjoy2)) |
233 |
|
|
|
234 |
|
|
if (newjoy2) { // Open joystick |
235 |
|
|
joy_state = 0xff; |
236 |
|
|
port_allocated = false; |
237 |
|
|
|
238 |
|
|
// Allocate game port |
239 |
|
|
BYTE ctype; |
240 |
|
|
Forbid(); |
241 |
|
|
game_io->io_Command = GPD_ASKCTYPE; |
242 |
|
|
game_io->io_Data = &ctype; |
243 |
|
|
game_io->io_Length = 1; |
244 |
|
|
DoIO((struct IORequest *)game_io); |
245 |
|
|
|
246 |
|
|
if (ctype != GPCT_NOCONTROLLER) |
247 |
|
|
Permit(); |
248 |
|
|
else { |
249 |
|
|
ctype = GPCT_ABSJOYSTICK; |
250 |
|
|
game_io->io_Command = GPD_SETCTYPE; |
251 |
|
|
game_io->io_Data = &ctype; |
252 |
|
|
game_io->io_Length = 1; |
253 |
|
|
DoIO((struct IORequest *)game_io); |
254 |
|
|
Permit(); |
255 |
|
|
|
256 |
|
|
port_allocated = true; |
257 |
|
|
|
258 |
|
|
// Set trigger conditions |
259 |
|
|
game_trigger.gpt_Keys = GPTF_UPKEYS | GPTF_DOWNKEYS; |
260 |
|
|
game_trigger.gpt_Timeout = 65535; |
261 |
|
|
game_trigger.gpt_XDelta = 1; |
262 |
|
|
game_trigger.gpt_YDelta = 1; |
263 |
|
|
game_io->io_Command = GPD_SETTRIGGER; |
264 |
|
|
game_io->io_Data = &game_trigger; |
265 |
|
|
game_io->io_Length = sizeof(struct GamePortTrigger); |
266 |
|
|
DoIO((struct IORequest *)game_io); |
267 |
|
|
|
268 |
|
|
// Flush device buffer |
269 |
|
|
game_io->io_Command = CMD_CLEAR; |
270 |
|
|
DoIO((struct IORequest *)game_io); |
271 |
|
|
|
272 |
|
|
// Start reading joystick events |
273 |
|
|
game_io->io_Command = GPD_READEVENT; |
274 |
|
|
game_io->io_Data = &game_event; |
275 |
|
|
game_io->io_Length = sizeof(struct InputEvent); |
276 |
|
|
SendIO((struct IORequest *)game_io); |
277 |
|
|
} |
278 |
|
|
|
279 |
|
|
} else { // Close joystick |
280 |
|
|
|
281 |
|
|
// Abort game_io |
282 |
|
|
if (!CheckIO((struct IORequest *)game_io)) { |
283 |
|
|
AbortIO((struct IORequest *)game_io); |
284 |
|
|
WaitIO((struct IORequest *)game_io); |
285 |
|
|
} |
286 |
|
|
|
287 |
|
|
// Free game port |
288 |
|
|
if (port_allocated) { |
289 |
|
|
BYTE ctype = GPCT_NOCONTROLLER; |
290 |
|
|
game_io->io_Command = GPD_SETCTYPE; |
291 |
|
|
game_io->io_Data = &ctype; |
292 |
|
|
game_io->io_Length = 1; |
293 |
|
|
DoIO((struct IORequest *)game_io); |
294 |
|
|
|
295 |
|
|
port_allocated = false; |
296 |
|
|
} |
297 |
|
|
} |
298 |
|
|
} |
299 |
|
|
|
300 |
|
|
|
301 |
|
|
/* |
302 |
|
|
* Poll joystick port, return CIA mask |
303 |
|
|
*/ |
304 |
|
|
|
305 |
|
|
uint8 C64::poll_joystick(int port) |
306 |
|
|
{ |
307 |
|
|
if (port == 0) |
308 |
|
|
return 0xff; |
309 |
|
|
|
310 |
|
|
if (game_open && port_allocated) { |
311 |
|
|
|
312 |
|
|
// Joystick event arrived? |
313 |
|
|
while (GetMsg(game_port) != NULL) { |
314 |
|
|
|
315 |
|
|
// Yes, analyze event |
316 |
|
|
switch (game_event.ie_Code) { |
317 |
|
|
case IECODE_LBUTTON: // Button pressed |
318 |
|
|
joy_state &= 0xef; |
319 |
|
|
break; |
320 |
|
|
|
321 |
|
|
case IECODE_LBUTTON | IECODE_UP_PREFIX: // Button released |
322 |
|
|
joy_state |= 0x10; |
323 |
|
|
break; |
324 |
|
|
|
325 |
|
|
case IECODE_NOBUTTON: // Joystick moved |
326 |
|
|
if (game_event.ie_X == 1) |
327 |
|
|
joy_state &= 0xf7; // Right |
328 |
|
|
if (game_event.ie_X == -1) |
329 |
|
|
joy_state &= 0xfb; // Left |
330 |
|
|
if (game_event.ie_X == 0) |
331 |
|
|
joy_state |= 0x0c; |
332 |
|
|
if (game_event.ie_Y == 1) |
333 |
|
|
joy_state &= 0xfd; // Down |
334 |
|
|
if (game_event.ie_Y == -1) |
335 |
|
|
joy_state &= 0xfe; // Up |
336 |
|
|
if (game_event.ie_Y == 0) |
337 |
|
|
joy_state |= 0x03; |
338 |
|
|
break; |
339 |
|
|
} |
340 |
|
|
|
341 |
|
|
// Start reading the next event |
342 |
|
|
game_io->io_Command = GPD_READEVENT; |
343 |
|
|
game_io->io_Data = &game_event; |
344 |
|
|
game_io->io_Length = sizeof(struct InputEvent); |
345 |
|
|
SendIO((struct IORequest *)game_io); |
346 |
|
|
} |
347 |
|
|
return joy_state; |
348 |
|
|
|
349 |
|
|
} else |
350 |
|
|
return 0xff; |
351 |
|
|
} |
352 |
|
|
|
353 |
|
|
|
354 |
|
|
/* |
355 |
|
|
* The emulation's main loop |
356 |
|
|
*/ |
357 |
|
|
|
358 |
|
|
void C64::thread_func(void) |
359 |
|
|
{ |
360 |
|
|
while (!quit_thyself) { |
361 |
|
|
|
362 |
|
|
#ifdef FRODO_SC |
363 |
|
|
// The order of calls is important here |
364 |
|
|
if (TheVIC->EmulateCycle()) |
365 |
|
|
TheSID->EmulateLine(); |
366 |
|
|
TheCIA1->CheckIRQs(); |
367 |
|
|
TheCIA2->CheckIRQs(); |
368 |
|
|
TheCIA1->EmulateCycle(); |
369 |
|
|
TheCIA2->EmulateCycle(); |
370 |
|
|
TheCPU->EmulateCycle(); |
371 |
|
|
|
372 |
|
|
if (ThePrefs.Emul1541Proc) { |
373 |
|
|
TheCPU1541->CountVIATimers(1); |
374 |
|
|
if (!TheCPU1541->Idle) |
375 |
|
|
TheCPU1541->EmulateCycle(); |
376 |
|
|
} |
377 |
|
|
CycleCounter++; |
378 |
|
|
#else |
379 |
|
|
// The order of calls is important here |
380 |
|
|
int cycles = TheVIC->EmulateLine(); |
381 |
|
|
TheSID->EmulateLine(); |
382 |
|
|
#if !PRECISE_CIA_CYCLES |
383 |
|
|
TheCIA1->EmulateLine(ThePrefs.CIACycles); |
384 |
|
|
TheCIA2->EmulateLine(ThePrefs.CIACycles); |
385 |
|
|
#endif |
386 |
|
|
|
387 |
|
|
if (ThePrefs.Emul1541Proc) { |
388 |
|
|
int cycles_1541 = ThePrefs.FloppyCycles; |
389 |
|
|
TheCPU1541->CountVIATimers(cycles_1541); |
390 |
|
|
|
391 |
|
|
if (!TheCPU1541->Idle) { |
392 |
|
|
// 1541 processor active, alternately execute |
393 |
|
|
// 6502 and 6510 instructions until both have |
394 |
|
|
// used up their cycles |
395 |
|
|
while (cycles >= 0 || cycles_1541 >= 0) |
396 |
|
|
if (cycles > cycles_1541) |
397 |
|
|
cycles -= TheCPU->EmulateLine(1); |
398 |
|
|
else |
399 |
|
|
cycles_1541 -= TheCPU1541->EmulateLine(1); |
400 |
|
|
} else |
401 |
|
|
TheCPU->EmulateLine(cycles); |
402 |
|
|
} else |
403 |
|
|
// 1541 processor disabled, only emulate 6510 |
404 |
|
|
TheCPU->EmulateLine(cycles); |
405 |
|
|
#endif |
406 |
|
|
} |
407 |
|
|
} |