321 lines
7.7 KiB
C
321 lines
7.7 KiB
C
/*
|
|
* C64_x.h - Put the pieces together, X specific stuff
|
|
*
|
|
* Frodo (C) 1994-1997,2002-2004 Christian Bauer
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*/
|
|
|
|
#include "main.h"
|
|
|
|
|
|
static struct timeval tv_start;
|
|
|
|
#ifndef HAVE_USLEEP
|
|
/*
|
|
* NAME:
|
|
* usleep -- This is the precision timer for Test Set
|
|
* Automation. It uses the select(2) system
|
|
* call to delay for the desired number of
|
|
* micro-seconds. This call returns ZERO
|
|
* (which is usually ignored) on successful
|
|
* completion, -1 otherwise.
|
|
*
|
|
* ALGORITHM:
|
|
* 1) We range check the passed in microseconds and log a
|
|
* warning message if appropriate. We then return without
|
|
* delay, flagging an error.
|
|
* 2) Load the Seconds and micro-seconds portion of the
|
|
* interval timer structure.
|
|
* 3) Call select(2) with no file descriptors set, just the
|
|
* timer, this results in either delaying the proper
|
|
* ammount of time or being interupted early by a signal.
|
|
*
|
|
* HISTORY:
|
|
* Added when the need for a subsecond timer was evident.
|
|
*
|
|
* AUTHOR:
|
|
* Michael J. Dyer Telephone: AT&T 414.647.4044
|
|
* General Electric Medical Systems GE DialComm 8 *767.4044
|
|
* P.O. Box 414 Mail Stop 12-27 Sect'y AT&T 414.647.4584
|
|
* Milwaukee, Wisconsin USA 53201 8 *767.4584
|
|
* internet: mike@sherlock.med.ge.com GEMS WIZARD e-mail: DYER
|
|
*/
|
|
|
|
#include <unistd.h>
|
|
#include <stdlib.h>
|
|
#include <stdio.h>
|
|
#include <errno.h>
|
|
#include <time.h>
|
|
#include <sys/time.h>
|
|
#include <sys/param.h>
|
|
#include <sys/types.h>
|
|
|
|
int usleep(unsigned long int microSeconds)
|
|
{
|
|
unsigned int Seconds, uSec;
|
|
int nfds, readfds, writefds, exceptfds;
|
|
struct timeval Timer;
|
|
|
|
nfds = readfds = writefds = exceptfds = 0;
|
|
|
|
if( (microSeconds == (unsigned long) 0)
|
|
|| microSeconds > (unsigned long) 4000000 )
|
|
{
|
|
errno = ERANGE; /* value out of range */
|
|
perror( "usleep time out of range ( 0 -> 4000000 ) " );
|
|
return -1;
|
|
}
|
|
|
|
Seconds = microSeconds / (unsigned long) 1000000;
|
|
uSec = microSeconds % (unsigned long) 1000000;
|
|
|
|
Timer.tv_sec = Seconds;
|
|
Timer.tv_usec = uSec;
|
|
|
|
if( select( nfds, &readfds, &writefds, &exceptfds, &Timer ) < 0 )
|
|
{
|
|
perror( "usleep (select) failed" );
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
#ifdef __linux__
|
|
// select() timing is much more accurate under Linux
|
|
static void Delay_usec(unsigned long usec)
|
|
{
|
|
int was_error;
|
|
struct timeval tv;
|
|
|
|
tv.tv_sec = 0;
|
|
tv.tv_usec = usec;
|
|
do {
|
|
errno = 0;
|
|
was_error = select(0, NULL, NULL, NULL, &tv);
|
|
} while (was_error && (errno == EINTR));
|
|
}
|
|
#else
|
|
static void Delay_usec(unsigned long usec)
|
|
{
|
|
usleep(usec);
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* Constructor, system-dependent things
|
|
*/
|
|
|
|
void C64::c64_ctor1(void)
|
|
{
|
|
// Initialize joystick variables
|
|
joy_minx[0] = joy_miny[0] = 32767;
|
|
joy_maxx[0] = joy_maxy[0] = -32768;
|
|
joy_minx[1] = joy_miny[1] = 32767;
|
|
joy_maxx[1] = joy_maxy[1] = -32768;
|
|
}
|
|
|
|
void C64::c64_ctor2(void)
|
|
{
|
|
gettimeofday(&tv_start, NULL);
|
|
}
|
|
|
|
|
|
/*
|
|
* Destructor, system-dependent things
|
|
*/
|
|
|
|
void C64::c64_dtor(void)
|
|
{
|
|
}
|
|
|
|
|
|
/*
|
|
* Start main emulation thread
|
|
*/
|
|
|
|
void C64::Run(void)
|
|
{
|
|
// Reset chips
|
|
TheCPU->Reset();
|
|
TheSID->Reset();
|
|
TheCIA1->Reset();
|
|
TheCIA2->Reset();
|
|
TheCPU1541->Reset();
|
|
|
|
// Patch kernal IEC routines
|
|
orig_kernal_1d84 = Kernal[0x1d84];
|
|
orig_kernal_1d85 = Kernal[0x1d85];
|
|
PatchKernal(ThePrefs.FastReset, ThePrefs.Emul1541Proc);
|
|
|
|
quit_thyself = false;
|
|
thread_func();
|
|
}
|
|
|
|
|
|
/*
|
|
* Vertical blank: Poll keyboard and joysticks, update window
|
|
*/
|
|
|
|
void C64::VBlank(bool draw_frame)
|
|
{
|
|
// Poll keyboard
|
|
TheDisplay->PollKeyboard(TheCIA1->KeyMatrix, TheCIA1->RevMatrix, &joykey);
|
|
if (TheDisplay->quit_requested)
|
|
quit_thyself = true;
|
|
|
|
// Poll joysticks
|
|
TheCIA1->Joystick1 = poll_joystick(0);
|
|
TheCIA1->Joystick2 = poll_joystick(1);
|
|
|
|
if (ThePrefs.JoystickSwap) {
|
|
uint8 tmp = TheCIA1->Joystick1;
|
|
TheCIA1->Joystick1 = TheCIA1->Joystick2;
|
|
TheCIA1->Joystick2 = tmp;
|
|
}
|
|
|
|
// Joystick keyboard emulation
|
|
if (TheDisplay->NumLock())
|
|
TheCIA1->Joystick1 &= joykey;
|
|
else
|
|
TheCIA1->Joystick2 &= joykey;
|
|
|
|
// Count TOD clocks
|
|
TheCIA1->CountTOD();
|
|
TheCIA2->CountTOD();
|
|
|
|
// Update window if needed
|
|
if (draw_frame) {
|
|
TheDisplay->Update();
|
|
|
|
// Calculate time between VBlanks, display speedometer
|
|
struct timeval tv;
|
|
gettimeofday(&tv, NULL);
|
|
if ((tv.tv_usec -= tv_start.tv_usec) < 0) {
|
|
tv.tv_usec += 1000000;
|
|
tv.tv_sec -= 1;
|
|
}
|
|
tv.tv_sec -= tv_start.tv_sec;
|
|
double elapsed_time = (double)tv.tv_sec * 1000000 + tv.tv_usec;
|
|
speed_index = 20000 / (elapsed_time + 1) * ThePrefs.SkipFrames * 100;
|
|
|
|
// Limit speed to 100% if desired
|
|
if ((speed_index > 100) && ThePrefs.LimitSpeed) {
|
|
Delay_usec((unsigned long)(ThePrefs.SkipFrames * 20000 - elapsed_time));
|
|
speed_index = 100;
|
|
}
|
|
|
|
gettimeofday(&tv_start, NULL);
|
|
|
|
TheDisplay->Speedometer((int)speed_index);
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* The emulation's main loop
|
|
*/
|
|
|
|
void C64::thread_func(void)
|
|
{
|
|
int linecnt = 0;
|
|
|
|
#ifdef FRODO_SC
|
|
while (!quit_thyself) {
|
|
|
|
// The order of calls is important here
|
|
if (TheVIC->EmulateCycle())
|
|
TheSID->EmulateLine();
|
|
TheCIA1->CheckIRQs();
|
|
TheCIA2->CheckIRQs();
|
|
TheCIA1->EmulateCycle();
|
|
TheCIA2->EmulateCycle();
|
|
TheCPU->EmulateCycle();
|
|
|
|
if (ThePrefs.Emul1541Proc) {
|
|
TheCPU1541->CountVIATimers(1);
|
|
if (!TheCPU1541->Idle)
|
|
TheCPU1541->EmulateCycle();
|
|
}
|
|
CycleCounter++;
|
|
#else
|
|
while (!quit_thyself) {
|
|
|
|
// The order of calls is important here
|
|
int cycles = TheVIC->EmulateLine();
|
|
TheSID->EmulateLine();
|
|
#if !PRECISE_CIA_CYCLES
|
|
TheCIA1->EmulateLine(ThePrefs.CIACycles);
|
|
TheCIA2->EmulateLine(ThePrefs.CIACycles);
|
|
#endif
|
|
|
|
if (ThePrefs.Emul1541Proc) {
|
|
int cycles_1541 = ThePrefs.FloppyCycles;
|
|
TheCPU1541->CountVIATimers(cycles_1541);
|
|
|
|
if (!TheCPU1541->Idle) {
|
|
// 1541 processor active, alternately execute
|
|
// 6502 and 6510 instructions until both have
|
|
// used up their cycles
|
|
while (cycles >= 0 || cycles_1541 >= 0)
|
|
if (cycles > cycles_1541)
|
|
cycles -= TheCPU->EmulateLine(1);
|
|
else
|
|
cycles_1541 -= TheCPU1541->EmulateLine(1);
|
|
} else
|
|
TheCPU->EmulateLine(cycles);
|
|
} else
|
|
// 1541 processor disabled, only emulate 6510
|
|
TheCPU->EmulateLine(cycles);
|
|
#endif
|
|
linecnt++;
|
|
#if !defined(__svgalib__)
|
|
if ((linecnt & 0xfff) == 0 && gui) {
|
|
|
|
// check for command from GUI process
|
|
// fprintf(stderr,":");
|
|
while (gui->probe()) {
|
|
char c;
|
|
if (gui->eread(&c, 1) != 1) {
|
|
delete gui;
|
|
gui = 0;
|
|
fprintf(stderr,"Oops, GUI process died...\n");
|
|
} else {
|
|
// fprintf(stderr,"%c",c);
|
|
switch (c) {
|
|
case 'q':
|
|
quit_thyself = true;
|
|
break;
|
|
case 'r':
|
|
Reset();
|
|
break;
|
|
case 'p':{
|
|
Prefs *np = Frodo::reload_prefs();
|
|
NewPrefs(np);
|
|
ThePrefs = *np;
|
|
break;
|
|
}
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
}
|
|
}
|