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frodo-wii/Src/C64_Acorn.h

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/*
* C64_Acorn.h - Put the pieces together, RISC OS 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 "Prefs.h"
#include "ROlib.h"
#include "AcornGUI.h"
void C64::LoadSystemConfig(const char *filename)
{
FILE *fp;
if ((fp = fopen(filename, "r")) != NULL)
{
int i;
Joy_Keys *jk;
int args[10];
char line[256];
while (fgets(line, 255, fp) != 0)
{
char *b = line;
register char c;
do {c = *b++;} while (c > 32);
if (c == 32) // keyword mustn't contain spaces
{
*(b-1) = '\0';
do {c = *b++;} while ((c >= 32) && (c != '='));
if (c == '=') // read in keyword's arguments
{
int i=0;
while ((*b != '\0') && (i < 10))
{
args[i++] = strtol(b, &b, 10);
}
if (strcmp(line, "PollAfter") == 0) {PollAfter = args[0];}
else if (strcmp(line, "SpeedAfter") == 0) {SpeedAfter = args[0];}
else if (strcmp(line, "PollSoundAfter") == 0) {PollSoundAfter = args[0];}
else if (strcmp(line, "JoystickKeys1") == 0)
{
jk = &(TheDisplay->JoystickKeys[0]);
jk->up = args[0]; jk->down = args[1]; jk->left = args[2]; jk->right = args[3];
jk->fire = args[4];
}
else if (strcmp(line, "JoystickKeys2") == 0)
{
jk = &(TheDisplay->JoystickKeys[1]);
jk->up = args[0]; jk->down = args[1]; jk->left = args[2]; jk->right = args[3];
jk->fire = args[4];
}
else
{
_kernel_oserror err;
err.errnum = 0;
sprintf(err.errmess,"Bad keyword <%s> in system configure file!",line);
Wimp_ReportError(&err,1,TASKNAME);
}
}
}
}
fclose(fp);
}
}
void C64::SaveSystemConfig(const char *filename)
{
FILE *fp;
if ((fp = fopen(filename, "w")) != NULL)
{
int i;
Joy_Keys *jk;
fprintf(fp,"PollAfter = %d\n", PollAfter);
fprintf(fp,"SpeedAfter = %d\n", SpeedAfter);
fprintf(fp,"PollSoundAfter = %d\n", PollSoundAfter);
for (i=0; i<2; i++)
{
jk = &(TheDisplay->JoystickKeys[i]);
fprintf(fp,"JoystickKeys%d",i+1);
fprintf(fp," = %d %d %d %d %d\n", jk->up, jk->down, jk->left, jk->right, jk->fire);
}
fclose(fp);
}
}
void C64::ReadTimings(int *poll_after, int *speed_after, int *sound_after)
{
*poll_after = PollAfter; *speed_after = SpeedAfter; *sound_after = PollSoundAfter;
}
void C64::WriteTimings(int poll_after, int speed_after, int sound_after)
{
PollAfter = poll_after; SpeedAfter = speed_after; PollSoundAfter = sound_after;
}
void C64::RequestSnapshot(void)
{
// Snapshots are only possible if the emulation progresses to the next vsync
if (have_a_break) Resume();
make_a_snapshot = true;
}
void C64::c64_ctor1(void)
{
TheWIMP = new WIMP(this);
PollAfter = 20; // poll every 20 centiseconds
SpeedAfter = 200; // update speedometer every 2 seconds
PollSoundAfter = 50; // poll DigitalRenderer every 50 lines
HostVolume = Sound_Volume(0);
// Just a precaution
if (HostVolume < 0) {HostVolume = 0;}
if (HostVolume > MaximumVolume) {HostVolume = MaximumVolume;}
Poll = false;
make_a_snapshot = false;
}
void C64::c64_ctor2(void)
{
LoadSystemConfig(DEFAULT_SYSCONF);
// was started from multitasking so pretend ScrollLock OFF no matter what
laststate = (ReadKeyboardStatus() & ~2); SingleTasking = false;
lastptr = 1;
}
void C64::c64_dtor(void)
{
delete TheWIMP;
}
void C64::open_close_joysticks(int oldjoy1, int oldjoy2, int newjoy1, int newjoy2)
{
// Check if the Joystick module is loaded. If not then write an illegal value to
// the joystick state.
if (Joystick_Read(0) == -2) {joystate[0] = 0;} else {joystate[0] = 0xff;}
if (Joystick_Read(1) == -2) {joystate[1] = 0;} else {joystate[1] = 0xff;}
}
uint8 C64::poll_joystick(int port)
{
register int state;
uint8 joy;
if ((state = Joystick_Read(port)) != -2) // module present
{
if (state == -1) {joy = joystate[port];} // use old value
else
{
joy = 0xff;
if ((state & (JoyButton1 + JoyButton2)) != 0) {joy &= 0xef;} // fire
if ((state & 0x80) == 0) // positive direction #1
{
if ((state & 0xff) >= JoyDir_Thresh) {joy &= 0xfe;} // up
}
else
{
if ((256 - (state & 0xff)) >= JoyDir_Thresh) {joy &= 0xfd;} // down
}
if ((state & 0x8000) == 0) // positive direction #2
{
if ((state & 0xff00) >= JoyDir_Thresh<<8) {joy &= 0xf7;} // right
}
else
{
if ((0x10000 - (state & 0xff00)) >= JoyDir_Thresh<<8) {joy &= 0xfb;} // left
}
}
joystate[port] = joy; return(joy);
}
else
{
joystate[port] = 0; return(0xff);
}
}
void C64::VBlank(bool draw_frame)
{
int Now, KeyState;
bool InputFocus;
// Poll keyboard if the window has the input focus.
InputFocus = TheWIMP->EmuWindow->HaveInput();
if (InputFocus)
{
TheDisplay->PollKeyboard(TheCIA1->KeyMatrix, TheCIA1->RevMatrix, &joykey, &joykey2);
}
// Poll Joysticks
TheCIA1->Joystick1 = (ThePrefs.Joystick1On) ? poll_joystick(0) : 0xff;
TheCIA1->Joystick2 = (ThePrefs.Joystick2On) ? poll_joystick(1) : 0xff;
// Swap joysticks?
if (ThePrefs.JoystickSwap)
{
register uint8 h;
h = TheCIA1->Joystick1; TheCIA1->Joystick1 = TheCIA1->Joystick2; TheCIA1->Joystick2 = h;
}
// Read keyboard state directly since we'll also need ScrollLock later!
KeyState = ReadKeyboardStatus();
if (InputFocus)
{
// Keyboard emulates which joystick? (NumLock ==> Port 2, else Port 1)
if ((KeyState & 4) == 0)
{
TheCIA1->Joystick2 &= joykey;
}
else // joykey2 only mapped if numLOCK is off.
{
TheCIA1->Joystick1 &= joykey; TheCIA1->Joystick2 &= joykey2;
}
}
if (draw_frame)
{
TheDisplay->Update();
}
// Make snapshot?
if (make_a_snapshot)
{
SaveSnapshot((TheWIMP->SnapFile)+44);
make_a_snapshot = false;
}
Now = OS_ReadMonotonicTime();
// Limit speed? (hahaha.... ah well...)
if (ThePrefs.LimitSpeed)
{
int Now;
while ((Now - LastFrame) < 2) // 2cs per frame = 50fps (original speed)
{
Now = OS_ReadMonotonicTime();
}
LastFrame = Now;
}
FramesSince++;
// Update speedometer (update, not force redraw!)?
if ((Now - LastSpeed) >= SpeedAfter)
{
char b[16];
if ((Now - LastSpeed) <= 0) {Now = LastSpeed+1;}
// Speed: 100% equals 50fps (round result)
sprintf(b,"%d%%\0",((400*FramesSince)/(Now - LastSpeed) + 1) >> 1);
TheWIMP->EmuPane->WriteIconTextU(Icon_Pane_Speed,b);
LastSpeed = Now; FramesSince = 0;
}
if (InputFocus)
{
// Scroll lock state changed?
if (((KeyState ^ laststate) & 2) != 0)
{
// change to single tasking: turn off mouse, else restore previous pointer
if ((KeyState & 2) != 0) {lastptr = SetMousePointer(0); SingleTasking = true;}
else {SetMousePointer(lastptr); OS_FlushBuffer(9); SingleTasking = false;}
}
if ((KeyState & 2) != 0) {lastptr = SetMousePointer(0);}
else {SetMousePointer(lastptr); OS_FlushBuffer(9);}
}
// Poll? ScrollLock forces single tasking, i.e. overrides timings.
if (!SingleTasking)
{
if ((Now - LastPoll) >= PollAfter)
{
Poll = true;
}
}
laststate = KeyState;
}
void C64::Run(void)
{
// Resetting chips
TheCPU->Reset();
TheSID->Reset();
TheCIA1->Reset();
TheCIA2->Reset();
TheCPU1541->Reset();
// Patch kernel IEC routines (copied from C64_Amiga.i
orig_kernal_1d84 = Kernal[0x1d84];
orig_kernal_1d85 = Kernal[0x1d85];
PatchKernal(ThePrefs.FastReset, ThePrefs.Emul1541Proc);
// Start the emulation
thread_running = true; quit_thyself = false; have_a_break = false;
thread_func();
}
void C64::Quit(void)
{
if (thread_running)
{
quit_thyself = true; thread_running = false;
}
}
void C64::Pause(void)
{
have_a_break = true; TheSID->PauseSound();
}
void C64::Resume(void)
{
have_a_break = false; TheSID->ResumeSound();
}
void C64::thread_func(void)
{
LastPoll = LastFrame = LastSpeed = OS_ReadMonotonicTime(); FramesSince = 0;
while (!quit_thyself)
{
#ifdef FRODO_SC
if (TheVIC->EmulateCycle()) {TheSID->EmulateLine();}
TheCIA1->EmulateCycle();
TheCIA2->EmulateCycle();
TheCPU->EmulateCycle();
if (ThePrefs.Emul1541Proc)
{
TheCPU1541->CountVIATimers(1);
if (!TheCPU1541->Idle) {TheCPU1541->EmulateCycle();}
}
CycleCounter++;
#else
// Emulate each device one rasterline. Order is important!
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)
{
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
{
TheCPU->EmulateLine(cycles);
}
#endif
// Single-tasking: busy-wait 'til unpause
while (SingleTasking && have_a_break)
{
int KeyState;
TheDisplay->CheckForUnpause(true); // unpause?
KeyState = ReadKeyboardStatus();
if ((KeyState & 2) == 0) // leave single tasking?
{
SetMousePointer(lastptr); OS_FlushBuffer(9); SingleTasking = false;
}
laststate = KeyState;
}
if (!SingleTasking)
{
// The system-specific part of this function
if (Poll || have_a_break)
{
TheWIMP->Poll(have_a_break);
LastPoll = LastFrame = OS_ReadMonotonicTime(); Poll = false;
}
}
}
}
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