mirror of
https://github.com/Oibaf66/frodo-wii.git
synced 2024-11-22 19:39:24 +01:00
440 lines
8.5 KiB
OpenEdge ABL
440 lines
8.5 KiB
OpenEdge ABL
/*
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* C64_WIN32.i - Put the pieces together, WIN32 specific stuff
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*
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* Frodo (C) 1994-1997,2002 Christian Bauer
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* WIN32 code by J. Richard Sladkey <jrs@world.std.com>
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*/
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#include <process.h>
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#include "main.h"
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#define FRAME_INTERVAL (1000/SCREEN_FREQ) // in milliseconds
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#ifdef FRODO_SC
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#define SPEEDOMETER_INTERVAL 4000 // in milliseconds
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#else
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#define SPEEDOMETER_INTERVAL 1000 // in milliseconds
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#endif
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#define JOYSTICK_SENSITIVITY 40 // % of live range
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#define JOYSTICK_MIN 0x0000 // min value of range
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#define JOYSTICK_MAX 0xffff // max value of range
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#define JOYSTICK_RANGE (JOYSTICK_MAX - JOYSTICK_MIN)
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static BOOL high_resolution_timer = FALSE;
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/*
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* Constructor, system-dependent things
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*/
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void C64::c64_ctor1()
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{
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Debug("C64::c64_ctor1\n");
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// Initialize joystick variables.
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joy_state = 0xff;
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// No need to check for state change.
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state_change = FALSE;
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// Start the synchronization timer.
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timer_semaphore = NULL;
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timer_id = NULL;
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StartTimer();
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}
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void C64::c64_ctor2()
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{
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Debug("C64::c64_ctor2\n");
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}
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/*
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* Destructor, system-dependent things
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*/
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void C64::c64_dtor()
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{
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Debug("C64::c64_dtor\n");
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StopTimer();
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}
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/*
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* Start emulation
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*/
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void C64::Run()
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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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// 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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patch_kernal(ThePrefs.FastReset, ThePrefs.Emul1541Proc);
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// Start the CPU thread
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thread_func();
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}
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/*
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* Stop emulation
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*/
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void C64::Quit()
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{
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// Ask the thread to quit itself if it is running
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quit_thyself = TRUE;
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state_change = TRUE;
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}
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/*
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* Pause emulation
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*/
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void C64::Pause()
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{
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StopTimer();
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TheSID->PauseSound();
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have_a_break = TRUE;
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state_change = TRUE;
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}
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/*
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* Resume emulation
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*/
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void C64::Resume()
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{
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StartTimer();
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TheSID->ResumeSound();
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have_a_break = FALSE;
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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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void C64::VBlank(bool draw_frame)
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{
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//Debug("C64::VBlank\n");
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// Poll the keyboard.
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TheDisplay->PollKeyboard(TheCIA1->KeyMatrix, TheCIA1->RevMatrix, &joykey);
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// Poll the joysticks.
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TheCIA1->Joystick1 = poll_joystick(0);
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TheCIA1->Joystick2 = poll_joystick(1);
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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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// 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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// Count TOD clocks.
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TheCIA1->CountTOD();
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TheCIA2->CountTOD();
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#if 1
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// Output a frag.
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TheSID->VBlank();
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#endif
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if (have_a_break)
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return;
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// Update the window if needed.
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frame++;
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if (draw_frame) {
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// Synchronize to the timer if limiting the speed.
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if (ThePrefs.LimitSpeed) {
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if (skipped_frames == 0) {
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// There is a tiny race condtion here that
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// could cause a full extra delay cycle.
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WaitForSingleObject(timer_semaphore, INFINITE);
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}
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else {
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Debug("*** Skipped a frame! ***\n");
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skipped_frames = 0;
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}
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}
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// Perform the actual screen update exactly at the
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// beginning of an interval for the smoothest video.
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TheDisplay->Update();
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// Compute the speed index and show it in the speedometer.
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DWORD now = timeGetTime();
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int elapsed_time = now - ref_time;
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if (now - ref_time >= SPEEDOMETER_INTERVAL) {
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double speed_index = double(frame * FRAME_INTERVAL * 100 + elapsed_time/2) / elapsed_time;
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TheDisplay->Speedometer((int)speed_index);
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ref_time = now;
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frame = 0;
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}
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// Make sure our timer is set correctly.
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CheckTimerChange();
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}
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}
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void C64::CheckTimerChange()
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{
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// Make sure the timer interval matches the preferences.
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if (!ThePrefs.LimitSpeed && timer_every == 0)
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return;
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if (ThePrefs.LimitSpeed && ThePrefs.SkipFrames == timer_every)
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return;
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StopTimer();
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StartTimer();
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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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BOOL joystick_open[2];
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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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if (oldjoy1 != newjoy1) {
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joystick_open[0] = FALSE;
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if (newjoy1) {
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JOYINFO joyinfo;
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if (joyGetPos(0, &joyinfo) == JOYERR_NOERROR)
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joystick_open[0] = TRUE;
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}
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}
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if (oldjoy2 != newjoy2) {
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joystick_open[1] = FALSE;
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if (newjoy1) {
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JOYINFO joyinfo;
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if (joyGetPos(1, &joyinfo) == JOYERR_NOERROR)
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joystick_open[1] = TRUE;
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}
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}
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// XXX: Should have our own new prefs!
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state_change = TRUE;
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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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uint8 C64::poll_joystick(int port)
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{
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uint8 j = 0xff;
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if (joystick_open[port]) {
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JOYINFO joyinfo;
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if (joyGetPos(port, &joyinfo) == JOYERR_NOERROR) {
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int x = joyinfo.wXpos;
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int y = joyinfo.wYpos;
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int buttons = joyinfo.wButtons;
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int s1 = JOYSTICK_SENSITIVITY;
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int s2 = 100 - JOYSTICK_SENSITIVITY;
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if (x < JOYSTICK_MIN + s1*JOYSTICK_RANGE/100)
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j &= 0xfb; // Left
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else if (x > JOYSTICK_MIN + s2*JOYSTICK_RANGE/100)
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j &= 0xf7; // Right
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if (y < JOYSTICK_MIN + s1*JOYSTICK_RANGE/100)
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j &= 0xfe; // Up
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else if (y > JOYSTICK_MIN + s2*JOYSTICK_RANGE/100)
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j &= 0xfd; // Down
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if (buttons & 1)
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j &= 0xef; // Button
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if (buttons & 2) {
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Pause();
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while (joyGetPos(port, &joyinfo) == JOYERR_NOERROR && (joyinfo.wButtons & 2))
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Sleep(100);
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Resume();
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}
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}
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}
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return j;
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}
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void C64::StartTimer()
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{
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ref_time = timeGetTime();
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skipped_frames = 0;
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frame = 0;
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if (!ThePrefs.LimitSpeed) {
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timer_every = 0;
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StopTimer();
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return;
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}
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timer_every = ThePrefs.SkipFrames;
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if (!timer_semaphore) {
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timer_semaphore = CreateSemaphore(NULL, 0, 1, NULL);
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if (!timer_semaphore)
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Debug("CreateSemaphore failed\n");
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}
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if (!timer_id) {
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// Turn on high-resolution times and delays.
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int resolution = FRAME_INTERVAL;
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if (high_resolution_timer) {
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timeBeginPeriod(1);
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resolution = 0;
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}
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timer_id = timeSetEvent(timer_every*FRAME_INTERVAL, resolution, StaticTimeProc, (DWORD) this, TIME_PERIODIC);
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if (!timer_id)
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Debug("timeSetEvent failed\n");
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}
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}
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void C64::StopTimer()
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{
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if (timer_semaphore) {
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CloseHandle(timer_semaphore);
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timer_semaphore = NULL;
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}
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if (timer_id) {
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timeKillEvent(timer_id);
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timer_id = NULL;
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// Turn off high-resolution delays.
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if (high_resolution_timer)
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timeEndPeriod(1);
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}
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}
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void CALLBACK C64::StaticTimeProc(UINT uID, UINT uMsg, DWORD dwUser, DWORD dw1, DWORD dw2)
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{
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C64* TheC64 = (C64 *) dwUser;
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TheC64->TimeProc(uID);
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}
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void C64::TimeProc(UINT id)
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{
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if (id != timer_id) {
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Debug("TimeProc called for wrong timer id!\n");
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timeKillEvent(id);
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return;
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}
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if (!ReleaseSemaphore(timer_semaphore, 1, NULL))
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skipped_frames++;
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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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void C64::thread_func()
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{
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Debug("C64::thread_func\n");
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thread_running = TRUE;
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while (!quit_thyself) {
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if (have_a_break)
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TheDisplay->WaitUntilActive();
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#ifdef FRODO_SC
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if (ThePrefs.Emul1541Proc)
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EmulateCyclesWith1541();
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else
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EmulateCyclesWithout1541();
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state_change = FALSE;
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#else
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// The order of calls is important here
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int cycles = TheVIC->EmulateLine();
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TheSID->EmulateLine();
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#if !PRECISE_CIA_CYCLES
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TheCIA1->EmulateLine(ThePrefs.CIACycles);
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TheCIA2->EmulateLine(ThePrefs.CIACycles);
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#endif
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if (ThePrefs.Emul1541Proc) {
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int cycles_1541 = ThePrefs.FloppyCycles;
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TheCPU1541->CountVIATimers(cycles_1541);
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if (!TheCPU1541->Idle) {
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// 1541 processor active, alternately execute
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// 6502 and 6510 instructions until both have
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// used up their cycles
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while (cycles >= 0 || cycles_1541 >= 0)
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if (cycles > cycles_1541)
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cycles -= TheCPU->EmulateLine(1);
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else
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cycles_1541 -= TheCPU1541->EmulateLine(1);
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} else
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TheCPU->EmulateLine(cycles);
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} else
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// 1541 processor disabled, only emulate 6510
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TheCPU->EmulateLine(cycles);
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#endif
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}
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thread_running = FALSE;
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}
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#ifdef FRODO_SC
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void C64::EmulateCyclesWith1541()
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{
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thread_running = TRUE;
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while (!state_change) {
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// The order of calls is important here
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if (TheVIC->EmulateCycle())
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TheSID->EmulateLine();
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#ifndef BATCH_CIA_CYCLES
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TheCIA1->EmulateCycle();
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TheCIA2->EmulateCycle();
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#endif
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TheCPU->EmulateCycle();
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TheCPU1541->CountVIATimers(1);
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if (!TheCPU1541->Idle)
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TheCPU1541->EmulateCycle();
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CycleCounter++;
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}
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}
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void C64::EmulateCyclesWithout1541()
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{
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thread_running = TRUE;
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while (!state_change) {
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// The order of calls is important here
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if (TheVIC->EmulateCycle())
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TheSID->EmulateLine();
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#ifndef BATCH_CIA_CYCLES
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TheCIA1->EmulateCycle();
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TheCIA2->EmulateCycle();
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#endif
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TheCPU->EmulateCycle();
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CycleCounter++;
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}
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}
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#endif
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