| 1 |
/* |
| 2 |
* C64_x.h - Put the pieces together, X 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 "main.h" |
| 22 |
|
| 23 |
|
| 24 |
static struct timeval tv_start; |
| 25 |
|
| 26 |
#ifndef HAVE_USLEEP |
| 27 |
/* |
| 28 |
* NAME: |
| 29 |
* usleep -- This is the precision timer for Test Set |
| 30 |
* Automation. It uses the select(2) system |
| 31 |
* call to delay for the desired number of |
| 32 |
* micro-seconds. This call returns ZERO |
| 33 |
* (which is usually ignored) on successful |
| 34 |
* completion, -1 otherwise. |
| 35 |
* |
| 36 |
* ALGORITHM: |
| 37 |
* 1) We range check the passed in microseconds and log a |
| 38 |
* warning message if appropriate. We then return without |
| 39 |
* delay, flagging an error. |
| 40 |
* 2) Load the Seconds and micro-seconds portion of the |
| 41 |
* interval timer structure. |
| 42 |
* 3) Call select(2) with no file descriptors set, just the |
| 43 |
* timer, this results in either delaying the proper |
| 44 |
* ammount of time or being interupted early by a signal. |
| 45 |
* |
| 46 |
* HISTORY: |
| 47 |
* Added when the need for a subsecond timer was evident. |
| 48 |
* |
| 49 |
* AUTHOR: |
| 50 |
* Michael J. Dyer Telephone: AT&T 414.647.4044 |
| 51 |
* General Electric Medical Systems GE DialComm 8 *767.4044 |
| 52 |
* P.O. Box 414 Mail Stop 12-27 Sect'y AT&T 414.647.4584 |
| 53 |
* Milwaukee, Wisconsin USA 53201 8 *767.4584 |
| 54 |
* internet: mike@sherlock.med.ge.com GEMS WIZARD e-mail: DYER |
| 55 |
*/ |
| 56 |
|
| 57 |
#include <unistd.h> |
| 58 |
#include <stdlib.h> |
| 59 |
#include <stdio.h> |
| 60 |
#include <errno.h> |
| 61 |
#include <time.h> |
| 62 |
#include <sys/time.h> |
| 63 |
#include <sys/param.h> |
| 64 |
#include <sys/types.h> |
| 65 |
|
| 66 |
int usleep(unsigned long int microSeconds) |
| 67 |
{ |
| 68 |
unsigned int Seconds, uSec; |
| 69 |
int nfds, readfds, writefds, exceptfds; |
| 70 |
struct timeval Timer; |
| 71 |
|
| 72 |
nfds = readfds = writefds = exceptfds = 0; |
| 73 |
|
| 74 |
if( (microSeconds == (unsigned long) 0) |
| 75 |
|| microSeconds > (unsigned long) 4000000 ) |
| 76 |
{ |
| 77 |
errno = ERANGE; /* value out of range */ |
| 78 |
perror( "usleep time out of range ( 0 -> 4000000 ) " ); |
| 79 |
return -1; |
| 80 |
} |
| 81 |
|
| 82 |
Seconds = microSeconds / (unsigned long) 1000000; |
| 83 |
uSec = microSeconds % (unsigned long) 1000000; |
| 84 |
|
| 85 |
Timer.tv_sec = Seconds; |
| 86 |
Timer.tv_usec = uSec; |
| 87 |
|
| 88 |
if( select( nfds, &readfds, &writefds, &exceptfds, &Timer ) < 0 ) |
| 89 |
{ |
| 90 |
perror( "usleep (select) failed" ); |
| 91 |
return -1; |
| 92 |
} |
| 93 |
|
| 94 |
return 0; |
| 95 |
} |
| 96 |
#endif |
| 97 |
|
| 98 |
#ifdef __linux__ |
| 99 |
// select() timing is much more accurate under Linux |
| 100 |
static void Delay_usec(unsigned long usec) |
| 101 |
{ |
| 102 |
int was_error; |
| 103 |
struct timeval tv; |
| 104 |
|
| 105 |
tv.tv_sec = 0; |
| 106 |
tv.tv_usec = usec; |
| 107 |
do { |
| 108 |
errno = 0; |
| 109 |
was_error = select(0, NULL, NULL, NULL, &tv); |
| 110 |
} while (was_error && (errno == EINTR)); |
| 111 |
} |
| 112 |
#else |
| 113 |
static void Delay_usec(unsigned long usec) |
| 114 |
{ |
| 115 |
usleep(usec); |
| 116 |
} |
| 117 |
#endif |
| 118 |
|
| 119 |
|
| 120 |
/* |
| 121 |
* Constructor, system-dependent things |
| 122 |
*/ |
| 123 |
|
| 124 |
void C64::c64_ctor1(void) |
| 125 |
{ |
| 126 |
// Initialize joystick variables |
| 127 |
joy_minx[0] = joy_miny[0] = 32767; |
| 128 |
joy_maxx[0] = joy_maxy[0] = -32768; |
| 129 |
joy_minx[1] = joy_miny[1] = 32767; |
| 130 |
joy_maxx[1] = joy_maxy[1] = -32768; |
| 131 |
|
| 132 |
// we need to create a potential GUI subprocess here, because we don't want |
| 133 |
// it to inherit file-descriptors (such as for the audio-device and alike..) |
| 134 |
#if defined(__svgalib__) |
| 135 |
gui = 0; |
| 136 |
#else |
| 137 |
// try to start up Tk gui. |
| 138 |
gui = new CmdPipe("wish", BINDIR "Frodo_GUI.tcl"); |
| 139 |
if (gui) { |
| 140 |
if (gui->fail) { |
| 141 |
delete gui; gui = 0; |
| 142 |
} |
| 143 |
} |
| 144 |
// wait until the GUI process responds (if it does...) |
| 145 |
if (gui) { |
| 146 |
if (5 != gui->ewrite("ping\n",5)) { |
| 147 |
delete gui; gui = 0; |
| 148 |
} else { |
| 149 |
char c; |
| 150 |
fd_set set; |
| 151 |
FD_ZERO(&set); |
| 152 |
FD_SET(gui->get_read_fd(), &set); |
| 153 |
struct timeval tv; |
| 154 |
tv.tv_usec = 0; |
| 155 |
tv.tv_sec = 5; |
| 156 |
// Use the following commented line for HP-UX < 10.20 |
| 157 |
// if (select(FD_SETSIZE, (int *)&set, (int *)NULL, (int *)NULL, &tv) <= 0) { |
| 158 |
if (select(FD_SETSIZE, &set, NULL, NULL, &tv) <= 0) { |
| 159 |
delete gui; gui = 0; |
| 160 |
} else { |
| 161 |
if (1 != gui->eread(&c, 1)) { |
| 162 |
delete gui; gui = 0; |
| 163 |
} else { |
| 164 |
if (c != 'o') { |
| 165 |
delete gui; gui = 0; |
| 166 |
} |
| 167 |
} |
| 168 |
} |
| 169 |
} |
| 170 |
} |
| 171 |
#endif // __svgalib__ |
| 172 |
} |
| 173 |
|
| 174 |
void C64::c64_ctor2(void) |
| 175 |
{ |
| 176 |
#ifndef __svgalib__ |
| 177 |
if (!gui) { |
| 178 |
fprintf(stderr,"Alas, master, no preferences window will be available.\n" |
| 179 |
"If you wish to see one, make sure the 'wish' interpreter\n" |
| 180 |
"(Tk version >= 4.1) is installed in your path.\n" |
| 181 |
"You can still use Frodo, though. Use F10 to quit, \n" |
| 182 |
"F11 to cause an NMI and F12 to reset the C64.\n" |
| 183 |
"You can change the preferences by editing ~/.frodorc\n"); |
| 184 |
} |
| 185 |
#endif // SVGAlib |
| 186 |
|
| 187 |
gettimeofday(&tv_start, NULL); |
| 188 |
} |
| 189 |
|
| 190 |
|
| 191 |
/* |
| 192 |
* Destructor, system-dependent things |
| 193 |
*/ |
| 194 |
|
| 195 |
void C64::c64_dtor(void) |
| 196 |
{ |
| 197 |
} |
| 198 |
|
| 199 |
|
| 200 |
/* |
| 201 |
* Start main emulation thread |
| 202 |
*/ |
| 203 |
|
| 204 |
void C64::Run(void) |
| 205 |
{ |
| 206 |
// Reset chips |
| 207 |
TheCPU->Reset(); |
| 208 |
TheSID->Reset(); |
| 209 |
TheCIA1->Reset(); |
| 210 |
TheCIA2->Reset(); |
| 211 |
TheCPU1541->Reset(); |
| 212 |
|
| 213 |
// Patch kernal IEC routines |
| 214 |
orig_kernal_1d84 = Kernal[0x1d84]; |
| 215 |
orig_kernal_1d85 = Kernal[0x1d85]; |
| 216 |
PatchKernal(ThePrefs.FastReset, ThePrefs.Emul1541Proc); |
| 217 |
|
| 218 |
quit_thyself = false; |
| 219 |
thread_func(); |
| 220 |
} |
| 221 |
|
| 222 |
|
| 223 |
/* |
| 224 |
* Vertical blank: Poll keyboard and joysticks, update window |
| 225 |
*/ |
| 226 |
|
| 227 |
void C64::VBlank(bool draw_frame) |
| 228 |
{ |
| 229 |
// Poll keyboard |
| 230 |
TheDisplay->PollKeyboard(TheCIA1->KeyMatrix, TheCIA1->RevMatrix, &joykey); |
| 231 |
if (TheDisplay->quit_requested) |
| 232 |
quit_thyself = true; |
| 233 |
|
| 234 |
// Poll joysticks |
| 235 |
TheCIA1->Joystick1 = poll_joystick(0); |
| 236 |
TheCIA1->Joystick2 = poll_joystick(1); |
| 237 |
|
| 238 |
if (ThePrefs.JoystickSwap) { |
| 239 |
uint8 tmp = TheCIA1->Joystick1; |
| 240 |
TheCIA1->Joystick1 = TheCIA1->Joystick2; |
| 241 |
TheCIA1->Joystick2 = tmp; |
| 242 |
} |
| 243 |
|
| 244 |
// Joystick keyboard emulation |
| 245 |
if (TheDisplay->NumLock()) |
| 246 |
TheCIA1->Joystick1 &= joykey; |
| 247 |
else |
| 248 |
TheCIA1->Joystick2 &= joykey; |
| 249 |
|
| 250 |
// Count TOD clocks |
| 251 |
TheCIA1->CountTOD(); |
| 252 |
TheCIA2->CountTOD(); |
| 253 |
|
| 254 |
// Update window if needed |
| 255 |
if (draw_frame) { |
| 256 |
TheDisplay->Update(); |
| 257 |
|
| 258 |
// Calculate time between VBlanks, display speedometer |
| 259 |
struct timeval tv; |
| 260 |
gettimeofday(&tv, NULL); |
| 261 |
if ((tv.tv_usec -= tv_start.tv_usec) < 0) { |
| 262 |
tv.tv_usec += 1000000; |
| 263 |
tv.tv_sec -= 1; |
| 264 |
} |
| 265 |
tv.tv_sec -= tv_start.tv_sec; |
| 266 |
double elapsed_time = (double)tv.tv_sec * 1000000 + tv.tv_usec; |
| 267 |
speed_index = 20000 / (elapsed_time + 1) * ThePrefs.SkipFrames * 100; |
| 268 |
|
| 269 |
// Limit speed to 100% if desired |
| 270 |
if ((speed_index > 100) && ThePrefs.LimitSpeed) { |
| 271 |
Delay_usec((unsigned long)(ThePrefs.SkipFrames * 20000 - elapsed_time)); |
| 272 |
speed_index = 100; |
| 273 |
} |
| 274 |
|
| 275 |
gettimeofday(&tv_start, NULL); |
| 276 |
|
| 277 |
TheDisplay->Speedometer((int)speed_index); |
| 278 |
} |
| 279 |
} |
| 280 |
|
| 281 |
|
| 282 |
/* |
| 283 |
* The emulation's main loop |
| 284 |
*/ |
| 285 |
|
| 286 |
void C64::thread_func(void) |
| 287 |
{ |
| 288 |
int linecnt = 0; |
| 289 |
|
| 290 |
#ifdef FRODO_SC |
| 291 |
while (!quit_thyself) { |
| 292 |
|
| 293 |
// The order of calls is important here |
| 294 |
if (TheVIC->EmulateCycle()) |
| 295 |
TheSID->EmulateLine(); |
| 296 |
TheCIA1->CheckIRQs(); |
| 297 |
TheCIA2->CheckIRQs(); |
| 298 |
TheCIA1->EmulateCycle(); |
| 299 |
TheCIA2->EmulateCycle(); |
| 300 |
TheCPU->EmulateCycle(); |
| 301 |
|
| 302 |
if (ThePrefs.Emul1541Proc) { |
| 303 |
TheCPU1541->CountVIATimers(1); |
| 304 |
if (!TheCPU1541->Idle) |
| 305 |
TheCPU1541->EmulateCycle(); |
| 306 |
} |
| 307 |
CycleCounter++; |
| 308 |
#else |
| 309 |
while (!quit_thyself) { |
| 310 |
|
| 311 |
// The order of calls is important here |
| 312 |
int cycles = TheVIC->EmulateLine(); |
| 313 |
TheSID->EmulateLine(); |
| 314 |
#if !PRECISE_CIA_CYCLES |
| 315 |
TheCIA1->EmulateLine(ThePrefs.CIACycles); |
| 316 |
TheCIA2->EmulateLine(ThePrefs.CIACycles); |
| 317 |
#endif |
| 318 |
|
| 319 |
if (ThePrefs.Emul1541Proc) { |
| 320 |
int cycles_1541 = ThePrefs.FloppyCycles; |
| 321 |
TheCPU1541->CountVIATimers(cycles_1541); |
| 322 |
|
| 323 |
if (!TheCPU1541->Idle) { |
| 324 |
// 1541 processor active, alternately execute |
| 325 |
// 6502 and 6510 instructions until both have |
| 326 |
// used up their cycles |
| 327 |
while (cycles >= 0 || cycles_1541 >= 0) |
| 328 |
if (cycles > cycles_1541) |
| 329 |
cycles -= TheCPU->EmulateLine(1); |
| 330 |
else |
| 331 |
cycles_1541 -= TheCPU1541->EmulateLine(1); |
| 332 |
} else |
| 333 |
TheCPU->EmulateLine(cycles); |
| 334 |
} else |
| 335 |
// 1541 processor disabled, only emulate 6510 |
| 336 |
TheCPU->EmulateLine(cycles); |
| 337 |
#endif |
| 338 |
linecnt++; |
| 339 |
#if !defined(__svgalib__) |
| 340 |
if ((linecnt & 0xfff) == 0 && gui) { |
| 341 |
|
| 342 |
// check for command from GUI process |
| 343 |
// fprintf(stderr,":"); |
| 344 |
while (gui->probe()) { |
| 345 |
char c; |
| 346 |
if (gui->eread(&c, 1) != 1) { |
| 347 |
delete gui; |
| 348 |
gui = 0; |
| 349 |
fprintf(stderr,"Oops, GUI process died...\n"); |
| 350 |
} else { |
| 351 |
// fprintf(stderr,"%c",c); |
| 352 |
switch (c) { |
| 353 |
case 'q': |
| 354 |
quit_thyself = true; |
| 355 |
break; |
| 356 |
case 'r': |
| 357 |
Reset(); |
| 358 |
break; |
| 359 |
case 'p':{ |
| 360 |
Prefs *np = Frodo::reload_prefs(); |
| 361 |
NewPrefs(np); |
| 362 |
ThePrefs = *np; |
| 363 |
break; |
| 364 |
} |
| 365 |
default: |
| 366 |
break; |
| 367 |
} |
| 368 |
} |
| 369 |
} |
| 370 |
} |
| 371 |
#endif |
| 372 |
} |
| 373 |
#if !defined(__svgalib__) |
| 374 |
if (gui) { |
| 375 |
gui->ewrite("quit\n",5); |
| 376 |
} |
| 377 |
#endif |
| 378 |
} |
