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frodo-wii/Src/C64_WIN32.h

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/*
* C64_WIN32.h - Put the pieces together, WIN32 specific stuff
*
* Frodo (C) 1994-1997,2002-2005 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 <process.h>
#include "main.h"
#define FRAME_INTERVAL (1000/SCREEN_FREQ) // in milliseconds
#ifdef FRODO_SC
#define SPEEDOMETER_INTERVAL 4000 // in milliseconds
#else
#define SPEEDOMETER_INTERVAL 1000 // in milliseconds
#endif
#define JOYSTICK_SENSITIVITY 40 // % of live range
#define JOYSTICK_MIN 0x0000 // min value of range
#define JOYSTICK_MAX 0xffff // max value of range
#define JOYSTICK_RANGE (JOYSTICK_MAX - JOYSTICK_MIN)
static BOOL high_resolution_timer = FALSE;
/*
* Constructor, system-dependent things
*/
void C64::c64_ctor1()
{
Debug("C64::c64_ctor1\n");
// Initialize joystick variables.
joy_state = 0xff;
// No need to check for state change.
state_change = FALSE;
// Start the synchronization timer.
timer_semaphore = NULL;
timer_id = NULL;
StartTimer();
}
void C64::c64_ctor2()
{
Debug("C64::c64_ctor2\n");
}
/*
* Destructor, system-dependent things
*/
void C64::c64_dtor()
{
Debug("C64::c64_dtor\n");
StopTimer();
}
/*
* Start emulation
*/
void C64::Run()
{
// 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];
patch_kernal(ThePrefs.FastReset, ThePrefs.Emul1541Proc);
// Start the CPU thread
thread_func();
}
/*
* Stop emulation
*/
void C64::Quit()
{
// Ask the thread to quit itself if it is running
quit_thyself = TRUE;
state_change = TRUE;
}
/*
* Pause emulation
*/
void C64::Pause()
{
StopTimer();
TheSID->PauseSound();
have_a_break = TRUE;
state_change = TRUE;
}
/*
* Resume emulation
*/
void C64::Resume()
{
StartTimer();
TheSID->ResumeSound();
have_a_break = FALSE;
}
/*
* Vertical blank: Poll keyboard and joysticks, update window
*/
void C64::VBlank(bool draw_frame)
{
//Debug("C64::VBlank\n");
// Poll the keyboard.
TheDisplay->PollKeyboard(TheCIA1->KeyMatrix, TheCIA1->RevMatrix, &joykey);
// Poll the 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();
#if 1
// Output a frag.
TheSID->VBlank();
#endif
if (have_a_break)
return;
// Update the window if needed.
frame++;
if (draw_frame) {
// Synchronize to the timer if limiting the speed.
if (ThePrefs.LimitSpeed) {
if (skipped_frames == 0) {
// There is a tiny race condtion here that
// could cause a full extra delay cycle.
WaitForSingleObject(timer_semaphore, INFINITE);
}
else {
Debug("*** Skipped a frame! ***\n");
skipped_frames = 0;
}
}
// Perform the actual screen update exactly at the
// beginning of an interval for the smoothest video.
TheDisplay->Update();
// Compute the speed index and show it in the speedometer.
DWORD now = timeGetTime();
int elapsed_time = now - ref_time;
if (now - ref_time >= SPEEDOMETER_INTERVAL) {
double speed_index = double(frame * FRAME_INTERVAL * 100 + elapsed_time/2) / elapsed_time;
TheDisplay->Speedometer((int)speed_index);
ref_time = now;
frame = 0;
}
// Make sure our timer is set correctly.
CheckTimerChange();
}
}
void C64::CheckTimerChange()
{
// Make sure the timer interval matches the preferences.
if (!ThePrefs.LimitSpeed && timer_every == 0)
return;
if (ThePrefs.LimitSpeed && ThePrefs.SkipFrames == timer_every)
return;
StopTimer();
StartTimer();
}
/*
* Open/close joystick drivers given old and new state of
* joystick preferences
*/
BOOL joystick_open[2];
void C64::open_close_joysticks(int oldjoy1, int oldjoy2, int newjoy1, int newjoy2)
{
if (oldjoy1 != newjoy1) {
joystick_open[0] = FALSE;
if (newjoy1) {
JOYINFO joyinfo;
if (joyGetPos(0, &joyinfo) == JOYERR_NOERROR)
joystick_open[0] = TRUE;
}
}
if (oldjoy2 != newjoy2) {
joystick_open[1] = FALSE;
if (newjoy1) {
JOYINFO joyinfo;
if (joyGetPos(1, &joyinfo) == JOYERR_NOERROR)
joystick_open[1] = TRUE;
}
}
// XXX: Should have our own new prefs!
state_change = TRUE;
}
/*
* Poll joystick port, return CIA mask
*/
uint8 C64::poll_joystick(int port)
{
uint8 j = 0xff;
if (joystick_open[port]) {
JOYINFO joyinfo;
if (joyGetPos(port, &joyinfo) == JOYERR_NOERROR) {
int x = joyinfo.wXpos;
int y = joyinfo.wYpos;
int buttons = joyinfo.wButtons;
int s1 = JOYSTICK_SENSITIVITY;
int s2 = 100 - JOYSTICK_SENSITIVITY;
if (x < JOYSTICK_MIN + s1*JOYSTICK_RANGE/100)
j &= 0xfb; // Left
else if (x > JOYSTICK_MIN + s2*JOYSTICK_RANGE/100)
j &= 0xf7; // Right
if (y < JOYSTICK_MIN + s1*JOYSTICK_RANGE/100)
j &= 0xfe; // Up
else if (y > JOYSTICK_MIN + s2*JOYSTICK_RANGE/100)
j &= 0xfd; // Down
if (buttons & 1)
j &= 0xef; // Button
if (buttons & 2) {
Pause();
while (joyGetPos(port, &joyinfo) == JOYERR_NOERROR && (joyinfo.wButtons & 2))
Sleep(100);
Resume();
}
}
}
return j;
}
void C64::StartTimer()
{
ref_time = timeGetTime();
skipped_frames = 0;
frame = 0;
if (!ThePrefs.LimitSpeed) {
timer_every = 0;
StopTimer();
return;
}
timer_every = ThePrefs.SkipFrames;
if (!timer_semaphore) {
timer_semaphore = CreateSemaphore(NULL, 0, 1, NULL);
if (!timer_semaphore)
Debug("CreateSemaphore failed\n");
}
if (!timer_id) {
// Turn on high-resolution times and delays.
int resolution = FRAME_INTERVAL;
if (high_resolution_timer) {
timeBeginPeriod(1);
resolution = 0;
}
timer_id = timeSetEvent(timer_every*FRAME_INTERVAL, resolution, StaticTimeProc, (DWORD) this, TIME_PERIODIC);
if (!timer_id)
Debug("timeSetEvent failed\n");
}
}
void C64::StopTimer()
{
if (timer_semaphore) {
CloseHandle(timer_semaphore);
timer_semaphore = NULL;
}
if (timer_id) {
timeKillEvent(timer_id);
timer_id = NULL;
// Turn off high-resolution delays.
if (high_resolution_timer)
timeEndPeriod(1);
}
}
void CALLBACK C64::StaticTimeProc(UINT uID, UINT uMsg, DWORD dwUser, DWORD dw1, DWORD dw2)
{
C64* TheC64 = (C64 *) dwUser;
TheC64->TimeProc(uID);
}
void C64::TimeProc(UINT id)
{
if (id != timer_id) {
Debug("TimeProc called for wrong timer id!\n");
timeKillEvent(id);
return;
}
if (!ReleaseSemaphore(timer_semaphore, 1, NULL))
skipped_frames++;
}
/*
* The emulation's main loop
*/
void C64::thread_func()
{
Debug("C64::thread_func\n");
thread_running = TRUE;
while (!quit_thyself) {
if (have_a_break)
TheDisplay->WaitUntilActive();
#ifdef FRODO_SC
if (ThePrefs.Emul1541Proc)
EmulateCyclesWith1541();
else
EmulateCyclesWithout1541();
state_change = FALSE;
#else
// 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
}
thread_running = FALSE;
}
#ifdef FRODO_SC
void C64::EmulateCyclesWith1541()
{
thread_running = TRUE;
while (!state_change) {
// The order of calls is important here
if (TheVIC->EmulateCycle())
TheSID->EmulateLine();
#ifndef BATCH_CIA_CYCLES
TheCIA1->EmulateCycle();
TheCIA2->EmulateCycle();
#endif
TheCPU->EmulateCycle();
TheCPU1541->CountVIATimers(1);
if (!TheCPU1541->Idle)
TheCPU1541->EmulateCycle();
CycleCounter++;
}
}
void C64::EmulateCyclesWithout1541()
{
thread_running = TRUE;
while (!state_change) {
// The order of calls is important here
if (TheVIC->EmulateCycle())
TheSID->EmulateLine();
#ifndef BATCH_CIA_CYCLES
TheCIA1->EmulateCycle();
TheCIA2->EmulateCycle();
#endif
TheCPU->EmulateCycle();
CycleCounter++;
}
}
#endif
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