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frodo-wii/Src/C64_SDL.i
simon.kagstrom bdd3632fe3 Snapshot loading implemented
2009-01-05 07:32:14 +00:00

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/*
* C64_x.i - Put the pieces together, X specific stuff
*
* Frodo (C) 1994-1997,2002 Christian Bauer
* Unix stuff by Bernd Schmidt/Lutz Vieweg
*/
#include "main.h"
#include <sys/types.h>
#include <dirent.h>
#if defined(GEKKO)
#include <wiiuse/wpad.h>
#define FONT_PATH "/apps/frodo/FreeMono.ttf"
#define SAVES_PATH "/apps/frodo/saves"
#define IMAGE_PATH "/apps/frodo/images"
#else
#define FONT_PATH "FreeMono.ttf"
#define SAVES_PATH "saves"
#define IMAGE_PATH "images"
#endif
#define MS_PER_FRAME 40
static struct timeval tv_start;
static int MENU_SIZE_X, MENU_SIZE_Y;
static const char *main_menu_messages[] = {
"Insert disc or tape", /* 0 */
"Load disc or tape", /* 1 */
"Reset C64", /* 2 */
"Bind key to joystick",/* 3 */
"Display options", /* 4 */
"Controller 1 joystick port", /* 5 */
"^|1|2",
"Save/Load state", /* 7 */
" ",
"Quit", /* 9 */
NULL,
};
static const char *display_option_messages[] = {
"1-1 resolution", /* 0 */
"double resolution, centered", /* 1 */
"full-screen stretched", /* 2 */
NULL,
};
static const char *bind_key_messages[] = {
"Bind to A", /* 0 */
"Bind to B", /* 1 */
"Bind to Plus", /* 2 */
"Bind to Minus", /* 3 */
"Bind to 1", /* 4 */
NULL,
};
static const char *save_load_state_messages[] = {
"Load saved state", /* 0 */
"Save current state", /* 1 */
"Delete state", /* 2 */
NULL,
};
/*
* Constructor, system-dependent things
*/
void C64::c64_ctor1(void)
{
// Initialize joystick variables
#ifdef HAVE_LINUX_JOYSTICK_H
joyfd[0] = joyfd[1] = -1;
joy_minx = joy_miny = 32767;
joy_maxx = joy_maxy = -32768;
#endif
this->fake_key_sequence = false;
this->fake_key_index = 0;
this->fake_key_keytime = 5;
this->fake_key_type = 0;
MENU_SIZE_X = FULL_DISPLAY_X;
MENU_SIZE_Y = FULL_DISPLAY_Y - FULL_DISPLAY_Y / 4;
SDL_RWops *rw;
Uint8 *data = (Uint8*)malloc(1 * 1024*1024);
FILE *fp = fopen(FONT_PATH, "r");
if (!fp) {
fprintf(stderr, "Could not open font\n");
exit(1);
}
fread(data, 1, 1 * 1024 * 1024, fp);
rw = SDL_RWFromMem(data, 1 * 1024 * 1024);
if (!rw) {
fprintf(stderr, "Could not create RW: %s\n", SDL_GetError());
exit(1);
}
this->menu_font = TTF_OpenFontRW(rw, 1, 20);
if (!this->menu_font)
{
fprintf(stderr, "Unable to open font\n" );
exit(1);
}
menu_init(&this->main_menu, this->menu_font, main_menu_messages,
0, 32, MENU_SIZE_X, MENU_SIZE_Y);
}
void C64::c64_ctor2(void)
{
gettimeofday(&tv_start, NULL);
}
/*
* Destructor, system-dependent things
*/
void C64::c64_dtor(void)
{
menu_fini(&this->main_menu);
}
static int cmpstringp(const void *p1, const void *p2)
{
return strcmp(* (char * const *) p1, * (char * const *) p2);
}
static const char **get_file_list(const char *base_dir)
{
DIR *d = opendir(base_dir);
const char **file_list;
int cur = 0;
struct dirent *de;
int cnt = 16;
if (!d)
return NULL;
file_list = (const char**)malloc(cnt * sizeof(char*));
file_list[cur++] = strdup("None");
file_list[cur] = NULL;
for (de = readdir(d);
de;
de = readdir(d))
{
if (strstr(de->d_name, ".d64") || strstr(de->d_name, ".D64") ||
strstr(de->d_name, ".t64") || strstr(de->d_name, ".T64") ||
strstr(de->d_name, ".sav"))
{
char *p;
p = strdup(de->d_name);
file_list[cur++] = p;
file_list[cur] = NULL;
if (cur > cnt - 2)
{
cnt = cnt + 32;
file_list = (const char**)realloc(file_list, cnt * sizeof(char*));
if (!file_list)
return NULL;
}
}
}
closedir(d);
qsort(file_list, cur, sizeof(const char *), cmpstringp);
return file_list;
}
void C64::select_disc(Prefs *np)
{
const char **file_list = get_file_list(IMAGE_PATH);
menu_t select_disc_menu;
if (file_list == NULL)
return;
menu_init(&select_disc_menu, this->menu_font, file_list,
0, 32, MENU_SIZE_X, MENU_SIZE_Y);
int opt = menu_select(real_screen, &select_disc_menu, NULL);
if (opt >= 0)
{
const char *name = file_list[opt];
if (strcmp(file_list[opt], "None") == 0)
{
strcpy(np->DrivePath[0], "\0");
}
else
{
snprintf(np->DrivePath[0], 255, "%s/%s",
IMAGE_PATH, name);
if (strstr(name, ".d64") || strstr(name, ".D64"))
np->DriveType[0] = DRVTYPE_D64;
else
np->DriveType[0] = DRVTYPE_T64;
NewPrefs(np);
ThePrefs = *np;
}
}
menu_fini(&select_disc_menu);
/* Cleanup everything */
for ( int i = 0; file_list[i]; i++ )
free((void*)file_list[i]);
free(file_list);
}
#define MATRIX(a,b) (((a) << 3) | (b))
void C64::bind_key(Prefs *np)
{
menu_t bind_key_menu;
menu_t key_menu;
static const char *keys[] = { "space", "Run/Stop", "return", "F1", "F3", "F5", "F7",
"0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "A",
"B", "C", "D", "E", "F", "G", "H", "I", "J", "K", "L", "M",
"N", "O", "P", "Q", "R", "S", "T", "U", "V", "W", "X", "Y", "Z",
NULL };
int kcs[] = { MATRIX(7, 4), MATRIX(7, 7), MATRIX(0, 1), /* space, R/S, return */
MATRIX(0, 4), MATRIX(0, 5), MATRIX(0, 6), MATRIX(0, 3), MATRIX(4, 3), MATRIX(7, 0),
MATRIX(7, 3), MATRIX(1, 0), MATRIX(1, 3), MATRIX(2, 0), MATRIX(2, 3), MATRIX(3, 0),
MATRIX(3, 3), MATRIX(4, 0), MATRIX(1, 2), MATRIX(3, 4), MATRIX(2, 4), MATRIX(2, 2),
MATRIX(1, 6), MATRIX(2, 5), MATRIX(3, 2), MATRIX(3, 5), MATRIX(4, 1), MATRIX(4, 2),
MATRIX(4, 5), MATRIX(5, 2), MATRIX(4, 4), MATRIX(4, 7), MATRIX(4, 6), MATRIX(5, 1),
MATRIX(7, 6), MATRIX(2, 1), MATRIX(1, 5), MATRIX(2, 6), MATRIX(3, 6), MATRIX(3, 7),
MATRIX(1, 1), MATRIX(2, 7), MATRIX(3, 1), MATRIX(1, 4) };
menu_init(&bind_key_menu, this->menu_font, bind_key_messages,
0, 32, MENU_SIZE_X, MENU_SIZE_Y);
int opt = menu_select(real_screen, &bind_key_menu, NULL);
if (opt >= 0)
{
menu_init(&key_menu, this->menu_font, keys,
0, 32, MENU_SIZE_X, MENU_SIZE_Y);
int key = menu_select(real_screen, &key_menu, NULL);
np->JoystickKeyBinding[opt] = kcs[key];
menu_fini(&key_menu);
}
menu_fini(&bind_key_menu);
}
void C64::display_options(Prefs *np)
{
menu_t display_menu;
menu_init(&display_menu, this->menu_font, display_option_messages,
0, 32, MENU_SIZE_X, MENU_SIZE_Y);
int opt = menu_select(real_screen, &display_menu, NULL);
if (opt >= 0)
np->DisplayOption = opt;
menu_fini(&display_menu);
}
void C64::save_load_state(Prefs *np)
{
menu_t save_load_menu;
menu_t select_saves_menu;
menu_init(&save_load_menu, this->menu_font, save_load_state_messages,
0, 32, MENU_SIZE_X, MENU_SIZE_Y);
int opt = menu_select(real_screen, &save_load_menu, NULL);
switch(opt)
{
case 1: /* save */
{
char buf[255];
char name[255];
char *p;
p = strrchr(ThePrefs.DrivePath[0], '/');
if (p == NULL)
strcpy(name, "unknown");
else
strncpy(name, p + 1, 255);
snprintf(buf, 255, "%s/%s.sav", SAVES_PATH, name);
this->SaveSnapshot(buf);
} break;
case 0: /* load/delete */
case 2:
{
const char **file_list = get_file_list(SAVES_PATH);
if (file_list == NULL)
break;
menu_init(&select_saves_menu, this->menu_font, file_list,
0, 32, MENU_SIZE_X, MENU_SIZE_Y);
int save = menu_select(real_screen, &select_saves_menu, NULL);
if (save >= 0)
{
char buf[255];
snprintf(buf, 255, "%s/%s", SAVES_PATH, file_list[save]);
if (opt == 2)
{
/* FIXME! Delete */
}
else /* Load the snapshot */
this->LoadSnapshot(buf);
}
menu_fini(&select_saves_menu);
/* Cleanup everything */
for ( int i = 0; file_list[i]; i++ )
free((void*)file_list[i]);
free(file_list);
} break;
default:
break;
}
menu_fini(&save_load_menu);
}
/*
* 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();
}
/* From dreamcast port */
static const char *auto_seq[4] =
{
"\nLOAD \"*\",8,1\nRUN\n",
"\nLOAD \"*\",9,1\nRUN\n",
"\nLOAD \"*\",10,1\nRUN\n",
"\nLOAD \"*\",11,1\nRUN\n",
};
extern "C" int get_kc_from_char(char c_in, int *shifted);
/*
* 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;
if (this->fake_key_sequence)
{
int shifted;
int kc = get_kc_from_char(auto_seq[this->fake_key_type][this->fake_key_index], &shifted);
TheDisplay->FakeKeyPress(kc, shifted, TheCIA1->KeyMatrix,
TheCIA1->RevMatrix);
this->fake_key_keytime --;
if (this->fake_key_keytime == 0)
{
this->fake_key_keytime = 1;
this->fake_key_index ++;
if (auto_seq[this->fake_key_type][this->fake_key_index] == '\0')
{
this->fake_key_sequence = false;
this->fake_key_index = 0;
this->fake_key_keytime = 5;
}
}
}
// Poll joysticks
TheCIA1->Joystick1 = poll_joystick(0);
TheCIA1->Joystick2 = poll_joystick(1);
// Count TOD clocks
TheCIA1->CountTOD();
TheCIA2->CountTOD();
// Update window if needed
if (draw_frame) {
TheDisplay->Update();
#if 0
// 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) * 100;
// Limit speed to 100% if desired
if ((speed_index > 100)) {
usleep((unsigned long)(20000 - elapsed_time));
speed_index = 100;
}
gettimeofday(&tv_start, NULL);
TheDisplay->Speedometer((int)speed_index);
#endif
}
if (this->have_a_break) {
int submenus[1];
int opt = menu_select(real_screen, &this->main_menu, submenus);
Prefs *np = Frodo::reload_prefs();
switch(opt)
{
case 0: /* Insert disc/tape */
this->select_disc(np);
break;
case 1: /* Load disc/tape */
this->fake_key_sequence = true;
break;
case 2: /* Reset */
Reset();
break;
case 3: /* Bind keys to joystick */
this->bind_key(np);
break;
case 4: /* Display options */
this->display_options(np);
break;
case 5: /* Swap joysticks */
break;
case 7: /* Save / load game */
this->save_load_state(np);
break;
case 9: /* Quit */
quit_thyself = true;
break;
case -1:
default:
break;
}
if (submenus[0] == 0)
np->JoystickSwap = false;
else
np->JoystickSwap = true;
this->NewPrefs(np);
ThePrefs = *np;
ThePrefs.Save(PREFS_PATH);
this->have_a_break = false;
}
/* From Acorn port */
static uint64_t lastFrame;
uint32_t now = SDL_GetTicks();
if ( (now - lastFrame) < MS_PER_FRAME ) {
SDL_Delay( MS_PER_FRAME - (now - lastFrame) );
}
lastFrame = now;
}
/*
* Open/close joystick drivers given old and new state of
* joystick preferences
*/
void C64::open_close_joysticks(bool oldjoy1, bool oldjoy2, bool newjoy1, bool newjoy2)
{
#ifdef HAVE_LINUX_JOYSTICK_H
if (oldjoy1 != newjoy1) {
joy_minx = joy_miny = 32767; // Reset calibration
joy_maxx = joy_maxy = -32768;
if (newjoy1) {
joyfd[0] = open("/dev/js0", O_RDONLY);
if (joyfd[0] < 0)
fprintf(stderr, "Couldn't open joystick 1\n");
} else {
close(joyfd[0]);
joyfd[0] = -1;
}
}
if (oldjoy2 != newjoy2) {
joy_minx = joy_miny = 32767; // Reset calibration
joy_maxx = joy_maxy = -32768;
if (newjoy2) {
joyfd[1] = open("/dev/js1", O_RDONLY);
if (joyfd[1] < 0)
fprintf(stderr, "Couldn't open joystick 2\n");
} else {
close(joyfd[1]);
joyfd[1] = -1;
}
}
#endif
}
/*
* Poll joystick port, return CIA mask
*/
uint8 C64::poll_joystick(int port)
{
#ifdef GEKKO
int controller = port;
Uint32 held;
uint8 j = 0xff;
if (ThePrefs.JoystickSwap)
controller = !port;
WPAD_ScanPads();
held = WPAD_ButtonsHeld(controller);
if (held & WPAD_BUTTON_UP)
j &= 0xfb; // Left
if (held & WPAD_BUTTON_DOWN)
j &= 0xf7; // Right
if (held & WPAD_BUTTON_RIGHT)
j &= 0xfe; // Up
if (held & WPAD_BUTTON_LEFT)
j &= 0xfd; // Down
if (held & WPAD_BUTTON_2)
j &= 0xef; // Button
if (held & WPAD_BUTTON_HOME)
this->enter_menu();
if ( (held & WPAD_BUTTON_A) && ThePrefs.JoystickKeyBinding[0])
TheDisplay->FakeKeyPressRepeat(ThePrefs.JoystickKeyBinding[0],
false, TheCIA1->KeyMatrix, TheCIA1->RevMatrix);
if ( (held & WPAD_BUTTON_B) && ThePrefs.JoystickKeyBinding[1])
TheDisplay->FakeKeyPressRepeat(ThePrefs.JoystickKeyBinding[1],
false, TheCIA1->KeyMatrix, TheCIA1->RevMatrix);
if ( (held & WPAD_BUTTON_PLUS) && ThePrefs.JoystickKeyBinding[2])
TheDisplay->FakeKeyPressRepeat(ThePrefs.JoystickKeyBinding[2],
false, TheCIA1->KeyMatrix, TheCIA1->RevMatrix);
if ( (held & WPAD_BUTTON_MINUS) && ThePrefs.JoystickKeyBinding[3])
TheDisplay->FakeKeyPressRepeat(ThePrefs.JoystickKeyBinding[3],
false, TheCIA1->KeyMatrix, TheCIA1->RevMatrix);
if ( (held & WPAD_BUTTON_1) && ThePrefs.JoystickKeyBinding[4])
TheDisplay->FakeKeyPressRepeat(ThePrefs.JoystickKeyBinding[4],
false, TheCIA1->KeyMatrix, TheCIA1->RevMatrix);
return j;
#elif defined(HAVE_LINUX_JOYSTICK_H)
JS_DATA_TYPE js;
uint8 j = 0xff;
if (joyfd[port] >= 0) {
if (read(joyfd[port], &js, JS_RETURN) == JS_RETURN) {
if (js.x > joy_maxx)
joy_maxx = js.x;
if (js.x < joy_minx)
joy_minx = js.x;
if (js.y > joy_maxy)
joy_maxy = js.y;
if (js.y < joy_miny)
joy_miny = js.y;
if (joy_maxx-joy_minx < 100 || joy_maxy-joy_miny < 100)
return 0xff;
if (js.x < (joy_minx + (joy_maxx-joy_minx)/3))
j &= 0xfb; // Left
else if (js.x > (joy_minx + 2*(joy_maxx-joy_minx)/3))
j &= 0xf7; // Right
if (js.y < (joy_miny + (joy_maxy-joy_miny)/3))
j &= 0xfe; // Up
else if (js.y > (joy_miny + 2*(joy_maxy-joy_miny)/3))
j &= 0xfd; // Down
if (js.buttons & 1)
j &= 0xef; // Button
}
}
return j;
#else
return 0xff;
#endif
}
/*
* 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++;
}
}
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