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/* |
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* C64_x.h - Put the pieces together, X specific stuff |
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* |
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* Frodo (C) 1994-1997,2002 Christian Bauer |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation; either version 2 of the License, or |
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* (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program; if not, write to the Free Software |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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*/ |
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|
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#include "main.h" |
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|
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|
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static struct timeval tv_start; |
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|
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#ifndef HAVE_USLEEP |
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/* |
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* NAME: |
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* usleep -- This is the precision timer for Test Set |
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* Automation. It uses the select(2) system |
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* call to delay for the desired number of |
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* micro-seconds. This call returns ZERO |
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* (which is usually ignored) on successful |
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* completion, -1 otherwise. |
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* |
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* ALGORITHM: |
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* 1) We range check the passed in microseconds and log a |
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* warning message if appropriate. We then return without |
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* delay, flagging an error. |
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* 2) Load the Seconds and micro-seconds portion of the |
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* interval timer structure. |
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* 3) Call select(2) with no file descriptors set, just the |
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* timer, this results in either delaying the proper |
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* ammount of time or being interupted early by a signal. |
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* |
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* HISTORY: |
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* Added when the need for a subsecond timer was evident. |
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* |
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* AUTHOR: |
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* Michael J. Dyer Telephone: AT&T 414.647.4044 |
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* General Electric Medical Systems GE DialComm 8 *767.4044 |
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* P.O. Box 414 Mail Stop 12-27 Sect'y AT&T 414.647.4584 |
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* Milwaukee, Wisconsin USA 53201 8 *767.4584 |
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* internet: mike@sherlock.med.ge.com GEMS WIZARD e-mail: DYER |
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*/ |
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|
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#include <unistd.h> |
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#include <stdlib.h> |
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#include <stdio.h> |
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#include <errno.h> |
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#include <time.h> |
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#include <sys/time.h> |
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#include <sys/param.h> |
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#include <sys/types.h> |
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|
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int usleep(unsigned long int microSeconds) |
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{ |
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unsigned int Seconds, uSec; |
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int nfds, readfds, writefds, exceptfds; |
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struct timeval Timer; |
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|
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nfds = readfds = writefds = exceptfds = 0; |
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|
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if( (microSeconds == (unsigned long) 0) |
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|| microSeconds > (unsigned long) 4000000 ) |
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{ |
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errno = ERANGE; /* value out of range */ |
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perror( "usleep time out of range ( 0 -> 4000000 ) " ); |
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return -1; |
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} |
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|
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Seconds = microSeconds / (unsigned long) 1000000; |
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uSec = microSeconds % (unsigned long) 1000000; |
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|
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Timer.tv_sec = Seconds; |
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Timer.tv_usec = uSec; |
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|
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if( select( nfds, &readfds, &writefds, &exceptfds, &Timer ) < 0 ) |
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{ |
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perror( "usleep (select) failed" ); |
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return -1; |
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} |
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|
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return 0; |
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} |
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#endif |
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|
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|
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/* |
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* Constructor, system-dependent things |
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*/ |
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|
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void C64::c64_ctor1(void) |
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{ |
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// Initialize joystick variables |
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joyfd[0] = joyfd[1] = -1; |
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joy_minx = joy_miny = 32767; |
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joy_maxx = joy_maxy = -32768; |
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|
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// we need to create a potential GUI subprocess here, because we don't want |
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// it to inherit file-descriptors (such as for the audio-device and alike..) |
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#if defined(__svgalib__) |
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gui = 0; |
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#else |
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// try to start up Tk gui. |
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gui = new CmdPipe("wish", "TkGui.tcl"); |
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if (gui) { |
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if (gui->fail) { |
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delete gui; gui = 0; |
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} |
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} |
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// wait until the GUI process responds (if it does...) |
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if (gui) { |
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if (5 != gui->ewrite("ping\n",5)) { |
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delete gui; gui = 0; |
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} else { |
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char c; |
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fd_set set; |
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FD_ZERO(&set); |
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FD_SET(gui->get_read_fd(), &set); |
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struct timeval tv; |
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tv.tv_usec = 0; |
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tv.tv_sec = 5; |
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// Use the following commented line for HP-UX < 10.20 |
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// if (select(FD_SETSIZE, (int *)&set, (int *)NULL, (int *)NULL, &tv) <= 0) { |
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if (select(FD_SETSIZE, &set, NULL, NULL, &tv) <= 0) { |
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delete gui; gui = 0; |
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} else { |
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if (1 != gui->eread(&c, 1)) { |
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delete gui; gui = 0; |
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} else { |
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if (c != 'o') { |
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delete gui; gui = 0; |
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} |
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} |
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} |
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} |
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} |
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#endif // __svgalib__ |
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} |
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|
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void C64::c64_ctor2(void) |
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{ |
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#ifndef __svgalib__ |
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if (!gui) { |
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fprintf(stderr,"Alas, master, no preferences window will be available.\n" |
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"If you wish to see one, make sure the 'wish' interpreter\n" |
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"(Tk version >= 4.1) is installed in your path.\n" |
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"You can still use Frodo, though. Use F10 to quit, \n" |
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"F11 to cause an NMI and F12 to reset the C64.\n" |
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"You can change the preferences by editing ~/.frodorc\n"); |
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} |
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#endif // SVGAlib |
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|
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gettimeofday(&tv_start, NULL); |
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} |
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|
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|
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/* |
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* Destructor, system-dependent things |
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*/ |
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|
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void C64::c64_dtor(void) |
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{ |
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} |
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|
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|
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/* |
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* Start main emulation thread |
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*/ |
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|
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void C64::Run(void) |
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{ |
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// Reset chips |
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TheCPU->Reset(); |
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TheSID->Reset(); |
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TheCIA1->Reset(); |
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TheCIA2->Reset(); |
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TheCPU1541->Reset(); |
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|
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// Patch kernal IEC routines |
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orig_kernal_1d84 = Kernal[0x1d84]; |
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orig_kernal_1d85 = Kernal[0x1d85]; |
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PatchKernal(ThePrefs.FastReset, ThePrefs.Emul1541Proc); |
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|
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quit_thyself = false; |
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thread_func(); |
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} |
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|
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|
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/* |
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* Vertical blank: Poll keyboard and joysticks, update window |
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*/ |
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|
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void C64::VBlank(bool draw_frame) |
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{ |
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// Poll keyboard |
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TheDisplay->PollKeyboard(TheCIA1->KeyMatrix, TheCIA1->RevMatrix, &joykey); |
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if (TheDisplay->quit_requested) |
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quit_thyself = true; |
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|
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// Poll joysticks |
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TheCIA1->Joystick1 = poll_joystick(0); |
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TheCIA1->Joystick2 = poll_joystick(1); |
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|
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if (ThePrefs.JoystickSwap) { |
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uint8 tmp = TheCIA1->Joystick1; |
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TheCIA1->Joystick1 = TheCIA1->Joystick2; |
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TheCIA1->Joystick2 = tmp; |
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} |
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|
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// Joystick keyboard emulation |
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if (TheDisplay->NumLock()) |
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TheCIA1->Joystick1 &= joykey; |
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else |
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TheCIA1->Joystick2 &= joykey; |
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|
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// Count TOD clocks |
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TheCIA1->CountTOD(); |
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TheCIA2->CountTOD(); |
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|
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// Update window if needed |
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if (draw_frame) { |
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TheDisplay->Update(); |
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|
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// Calculate time between VBlanks, display speedometer |
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struct timeval tv; |
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gettimeofday(&tv, NULL); |
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if ((tv.tv_usec -= tv_start.tv_usec) < 0) { |
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tv.tv_usec += 1000000; |
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tv.tv_sec -= 1; |
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} |
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tv.tv_sec -= tv_start.tv_sec; |
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double elapsed_time = (double)tv.tv_sec * 1000000 + tv.tv_usec; |
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speed_index = 20000 / (elapsed_time + 1) * ThePrefs.SkipFrames * 100; |
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|
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// Limit speed to 100% if desired |
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if ((speed_index > 100) && ThePrefs.LimitSpeed) { |
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usleep((unsigned long)(ThePrefs.SkipFrames * 20000 - elapsed_time)); |
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speed_index = 100; |
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} |
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|
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gettimeofday(&tv_start, NULL); |
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|
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TheDisplay->Speedometer((int)speed_index); |
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} |
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} |
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|
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|
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/* |
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* Open/close joystick drivers given old and new state of |
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* joystick preferences |
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*/ |
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|
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void C64::open_close_joysticks(bool oldjoy1, bool oldjoy2, bool newjoy1, bool newjoy2) |
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{ |
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#ifdef HAVE_LINUX_JOYSTICK_H |
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if (oldjoy1 != newjoy1) { |
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joy_minx = joy_miny = 32767; // Reset calibration |
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joy_maxx = joy_maxy = -32768; |
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if (newjoy1) { |
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joyfd[0] = open("/dev/js0", O_RDONLY); |
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if (joyfd[0] < 0) |
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fprintf(stderr, "Couldn't open joystick 1\n"); |
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} else { |
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close(joyfd[0]); |
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joyfd[0] = -1; |
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} |
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} |
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|
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if (oldjoy2 != newjoy2) { |
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joy_minx = joy_miny = 32767; // Reset calibration |
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joy_maxx = joy_maxy = -32768; |
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if (newjoy2) { |
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joyfd[1] = open("/dev/js1", O_RDONLY); |
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if (joyfd[1] < 0) |
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fprintf(stderr, "Couldn't open joystick 2\n"); |
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} else { |
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close(joyfd[1]); |
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joyfd[1] = -1; |
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} |
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} |
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#endif |
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} |
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|
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|
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/* |
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* Poll joystick port, return CIA mask |
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*/ |
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|
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uint8 C64::poll_joystick(int port) |
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{ |
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#ifdef HAVE_LINUX_JOYSTICK_H |
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JS_DATA_TYPE js; |
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uint8 j = 0xff; |
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|
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if (joyfd[port] >= 0) { |
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if (read(joyfd[port], &js, JS_RETURN) == JS_RETURN) { |
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if (js.x > joy_maxx) |
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joy_maxx = js.x; |
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if (js.x < joy_minx) |
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joy_minx = js.x; |
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if (js.y > joy_maxy) |
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joy_maxy = js.y; |
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if (js.y < joy_miny) |
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joy_miny = js.y; |
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|
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if (joy_maxx-joy_minx < 100 || joy_maxy-joy_miny < 100) |
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return 0xff; |
| 320 |
|
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if (js.x < (joy_minx + (joy_maxx-joy_minx)/3)) |
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j &= 0xfb; // Left |
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else if (js.x > (joy_minx + 2*(joy_maxx-joy_minx)/3)) |
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j &= 0xf7; // Right |
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|
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if (js.y < (joy_miny + (joy_maxy-joy_miny)/3)) |
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j &= 0xfe; // Up |
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else if (js.y > (joy_miny + 2*(joy_maxy-joy_miny)/3)) |
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j &= 0xfd; // Down |
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|
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if (js.buttons & 1) |
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j &= 0xef; // Button |
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} |
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} |
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return j; |
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#else |
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return 0xff; |
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#endif |
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} |
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|
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|
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/* |
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* The emulation's main loop |
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*/ |
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|
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void C64::thread_func(void) |
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{ |
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int linecnt = 0; |
| 349 |
|
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#ifdef FRODO_SC |
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while (!quit_thyself) { |
| 352 |
|
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// The order of calls is important here |
| 354 |
if (TheVIC->EmulateCycle()) |
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TheSID->EmulateLine(); |
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TheCIA1->CheckIRQs(); |
| 357 |
TheCIA2->CheckIRQs(); |
| 358 |
TheCIA1->EmulateCycle(); |
| 359 |
TheCIA2->EmulateCycle(); |
| 360 |
TheCPU->EmulateCycle(); |
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|
| 362 |
if (ThePrefs.Emul1541Proc) { |
| 363 |
TheCPU1541->CountVIATimers(1); |
| 364 |
if (!TheCPU1541->Idle) |
| 365 |
TheCPU1541->EmulateCycle(); |
| 366 |
} |
| 367 |
CycleCounter++; |
| 368 |
#else |
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while (!quit_thyself) { |
| 370 |
|
| 371 |
// The order of calls is important here |
| 372 |
int cycles = TheVIC->EmulateLine(); |
| 373 |
TheSID->EmulateLine(); |
| 374 |
#if !PRECISE_CIA_CYCLES |
| 375 |
TheCIA1->EmulateLine(ThePrefs.CIACycles); |
| 376 |
TheCIA2->EmulateLine(ThePrefs.CIACycles); |
| 377 |
#endif |
| 378 |
|
| 379 |
if (ThePrefs.Emul1541Proc) { |
| 380 |
int cycles_1541 = ThePrefs.FloppyCycles; |
| 381 |
TheCPU1541->CountVIATimers(cycles_1541); |
| 382 |
|
| 383 |
if (!TheCPU1541->Idle) { |
| 384 |
// 1541 processor active, alternately execute |
| 385 |
// 6502 and 6510 instructions until both have |
| 386 |
// used up their cycles |
| 387 |
while (cycles >= 0 || cycles_1541 >= 0) |
| 388 |
if (cycles > cycles_1541) |
| 389 |
cycles -= TheCPU->EmulateLine(1); |
| 390 |
else |
| 391 |
cycles_1541 -= TheCPU1541->EmulateLine(1); |
| 392 |
} else |
| 393 |
TheCPU->EmulateLine(cycles); |
| 394 |
} else |
| 395 |
// 1541 processor disabled, only emulate 6510 |
| 396 |
TheCPU->EmulateLine(cycles); |
| 397 |
#endif |
| 398 |
linecnt++; |
| 399 |
#if !defined(__svgalib__) |
| 400 |
if ((linecnt & 0xfff) == 0 && gui) { |
| 401 |
|
| 402 |
// check for command from GUI process |
| 403 |
// fprintf(stderr,":"); |
| 404 |
while (gui->probe()) { |
| 405 |
char c; |
| 406 |
if (gui->eread(&c, 1) != 1) { |
| 407 |
delete gui; |
| 408 |
gui = 0; |
| 409 |
fprintf(stderr,"Oops, GUI process died...\n"); |
| 410 |
} else { |
| 411 |
// fprintf(stderr,"%c",c); |
| 412 |
switch (c) { |
| 413 |
case 'q': |
| 414 |
quit_thyself = true; |
| 415 |
break; |
| 416 |
case 'r': |
| 417 |
Reset(); |
| 418 |
break; |
| 419 |
case 'p':{ |
| 420 |
Prefs *np = Frodo::reload_prefs(); |
| 421 |
NewPrefs(np); |
| 422 |
ThePrefs = *np; |
| 423 |
break; |
| 424 |
} |
| 425 |
default: |
| 426 |
break; |
| 427 |
} |
| 428 |
} |
| 429 |
} |
| 430 |
} |
| 431 |
#endif |
| 432 |
} |
| 433 |
#if !defined(__svgalib__) |
| 434 |
if (gui) { |
| 435 |
gui->ewrite("quit\n",5); |
| 436 |
} |
| 437 |
#endif |
| 438 |
} |
