eliminate texrels (wip2)
[picodrive.git] / platform / gizmondo / emu.c
index 3d5fae7..3a6c861 100644 (file)
 #include <windows.h>
+#include <string.h>
 
+#include <sys/stat.h>  // mkdir
+#include <sys/types.h>
+
+#include "kgsdk/Framework.h"
+#include "kgsdk/Framework2D.h"
+#include "kgsdk/FrameworkAudio.h"
+#include "../common/emu.h"
+#include "../common/lprintf.h"
+#include "../common/arm_utils.h"
+#include "../common/config.h"
 #include "emu.h"
+#include "menu.h"
+#include "giz.h"
+#include "asm_utils.h"
+
+#include <pico/pico_int.h>
+
+#ifdef BENCHMARK
+#define OSD_FPS_X 220
+#else
+#define OSD_FPS_X 260
+#endif
+
+// main 300K gfx-related buffer. Used by menu and renderers.
+unsigned char gfx_buffer[321*240*2*2];
+
+static short *snd_cbuff = NULL;
+static int snd_cbuf_samples = 0, snd_all_samples = 0;
+
+
+static void blit(const char *fps, const char *notice);
+static void clearArea(int full);
+
+int plat_get_root_dir(char *dst, int len)
+{
+       if (len > 0) *dst = 0;
+
+       return 0;
+}
+
+static void emu_msg_cb(const char *msg)
+{
+       if (giz_screen != NULL) fb_unlock();
+       giz_screen = fb_lock(1);
+
+       memset32((int *)((char *)giz_screen + 321*232*2), 0, 321*8*2/4);
+       emu_text_out16(4, 232, msg);
+       noticeMsgTime = GetTickCount() - 2000;
+
+       /* assumption: emu_msg_cb gets called only when something slow is about to happen */
+       reset_timing = 1;
+
+       fb_unlock();
+       giz_screen = fb_lock((currentConfig.EmuOpt&0x8000) ? 0 : 1);
+}
+
+void emu_stateCb(const char *str)
+{
+       if (giz_screen != NULL) fb_unlock();
+       giz_screen = fb_lock(1);
+
+       clearArea(0);
+       blit("", str);
+
+       fb_unlock();
+       giz_screen = NULL;
+
+       Sleep(0); /* yield the CPU, the system may need it */
+}
+
+void pemu_prep_defconfig(void)
+{
+       defaultConfig.s_PsndRate = 22050;
+       defaultConfig.s_PicoCDBuffers = 0;
+       defaultConfig.KeyBinds[ 2] = 1<<0; // SACB RLDU
+       defaultConfig.KeyBinds[ 3] = 1<<1;
+       defaultConfig.KeyBinds[ 0] = 1<<2;
+       defaultConfig.KeyBinds[ 1] = 1<<3;
+       defaultConfig.KeyBinds[ 5] = 1<<4;
+       defaultConfig.KeyBinds[ 6] = 1<<5;
+       defaultConfig.KeyBinds[ 7] = 1<<6;
+       defaultConfig.KeyBinds[ 4] = 1<<7;
+       defaultConfig.KeyBinds[13] = 1<<26; // switch rend
+       defaultConfig.KeyBinds[ 8] = 1<<27; // save state
+       defaultConfig.KeyBinds[ 9] = 1<<28; // load state
+       defaultConfig.KeyBinds[12] = 1<<29; // vol up
+       defaultConfig.KeyBinds[11] = 1<<30; // vol down
+       defaultConfig.scaling = 0;
+}
+
+
+static int EmuScanBegin16(unsigned int num)
+{
+       Pico.est.DrawLineDest = (unsigned short *) giz_screen + 321 * num;
+
+       if ((currentConfig.EmuOpt&0x4000) && (num&1) == 0) // (Pico.m.frame_count&1))
+               return 1; // skip next line
+
+       return 0;
+}
+
+static int EmuScanBegin8(unsigned int num)
+{
+       // draw like the fast renderer
+       Pico.est.HighCol = gfx_buffer + 328 * num;
+
+       return 0;
+}
+
+static void osd_text(int x, int y, const char *text)
+{
+       int len = strlen(text) * 8 / 2;
+       int *p, h;
+       for (h = 0; h < 8; h++) {
+               p = (int *) ((unsigned short *) giz_screen+x+321*(y+h));
+               p = (int *) ((int)p & ~3); // align
+               memset32(p, 0, len);
+       }
+       emu_text_out16(x, y, text);
+}
+
+static void cd_leds(void)
+{
+       static int old_reg = 0;
+       unsigned int col_g, col_r, *p;
+
+       if (!((Pico_mcd->s68k_regs[0] ^ old_reg) & 3)) return; // no change
+       old_reg = Pico_mcd->s68k_regs[0];
+
+       p = (unsigned int *)((short *)giz_screen + 321*2+4+2);
+       col_g = (old_reg & 2) ? 0x06000600 : 0;
+       col_r = (old_reg & 1) ? 0xc000c000 : 0;
+       *p++ = col_g; *p++ = col_g; p+=2; *p++ = col_r; *p++ = col_r; p += 321/2 - 12/2 + 1;
+       *p++ = col_g; p+=3; *p++ = col_r; p += 321/2 - 10/2;
+       *p++ = col_g; *p++ = col_g; p+=2; *p++ = col_r; *p++ = col_r;
+}
+
+
+static short localPal[0x100];
+
+static void blit(const char *fps, const char *notice)
+{
+       int emu_opt = currentConfig.EmuOpt;
+
+       if (PicoOpt&0x10)
+       {
+               int lines_flags = 224;
+               // 8bit fast renderer
+               if (Pico.m.dirtyPal) {
+                       Pico.m.dirtyPal = 0;
+                       vidConvCpyRGB565(localPal, Pico.cram, 0x40);
+               }
+               // a hack for VR
+               if (PicoAHW & PAHW_SVP)
+                       memset32((int *)(PicoDraw2FB+328*8+328*223), 0xe0e0e0e0, 328);
+               if (!(Pico.video.reg[12]&1)) lines_flags|=0x10000;
+               if (currentConfig.EmuOpt&0x4000)
+                       lines_flags|=0x40000; // (Pico.m.frame_count&1)?0x20000:0x40000;
+               vidCpy8to16((unsigned short *)giz_screen+321*8, PicoDraw2FB+328*8, localPal, lines_flags);
+       }
+       else if (!(emu_opt&0x80))
+       {
+               int lines_flags;
+               // 8bit accurate renderer
+               if (Pico.m.dirtyPal) {
+                       Pico.m.dirtyPal = 0;
+                       vidConvCpyRGB565(localPal, Pico.cram, 0x40);
+                       if (Pico.video.reg[0xC]&8) { // shadow/hilight mode
+                               //vidConvCpyRGB32sh(localPal+0x40, Pico.cram, 0x40);
+                               //vidConvCpyRGB32hi(localPal+0x80, Pico.cram, 0x40); // TODO?
+                               memcpy32((void *)(localPal+0xc0), (void *)(localPal+0x40), 0x40*2/4);
+                               localPal[0xc0] = 0x0600;
+                               localPal[0xd0] = 0xc000;
+                               localPal[0xe0] = 0x0000; // reserved pixels for OSD
+                               localPal[0xf0] = 0xffff;
+                       }
+                       /* no support
+                       else if (rendstatus & 0x20) { // mid-frame palette changes
+                               vidConvCpyRGB565(localPal+0x40, HighPal, 0x40);
+                               vidConvCpyRGB565(localPal+0x80, HighPal+0x40, 0x40);
+                       } */
+               }
+               lines_flags = (Pico.video.reg[1]&8) ? 240 : 224;
+               if (!(Pico.video.reg[12]&1)) lines_flags|=0x10000;
+               if (currentConfig.EmuOpt&0x4000)
+                       lines_flags|=0x40000; // (Pico.m.frame_count&1)?0x20000:0x40000;
+               vidCpy8to16((unsigned short *)giz_screen+321*8, PicoDraw2FB+328*8, localPal, lines_flags);
+       }
+
+       if (notice || (emu_opt & 2)) {
+               int h = 232;
+               if (notice)      osd_text(4, h, notice);
+               if (emu_opt & 2) osd_text(OSD_FPS_X, h, fps);
+       }
+
+       if ((emu_opt & 0x400) && (PicoAHW & PAHW_MCD))
+               cd_leds();
+}
+
+// clears whole screen or just the notice area (in all buffers)
+static void clearArea(int full)
+{
+       if (giz_screen == NULL)
+               giz_screen = fb_lock(1);
+       if (full) memset32(giz_screen, 0, 320*240*2/4);
+       else      memset32((int *)((char *)giz_screen + 321*232*2), 0, 321*8*2/4);
+
+       if (currentConfig.EmuOpt&0x8000) {
+               fb_unlock();
+               giz_screen = fb_lock(0);
+               if (full) memset32(giz_screen, 0, 320*240*2/4);
+               else      memset32((int *)((char *)giz_screen + 321*232*2), 0, 321*8*2/4);
+       }
+}
+
+static void vidResetMode(void)
+{
+       giz_screen = fb_lock(1);
+
+       if (PicoOpt&0x10) {
+       } else if (currentConfig.EmuOpt&0x80) {
+               PicoDrawSetOutFormat(PDF_RGB555, 0);
+               PicoDrawSetCallbacks(EmuScanBegin16, NULL);
+       } else {
+               PicoDrawSetOutFormat(PDF_NONE, 0);
+               PicoDrawSetCallbacks(EmuScanBegin8, NULL);
+       }
+       if ((PicoOpt&0x10) || !(currentConfig.EmuOpt&0x80)) {
+               // setup pal for 8-bit modes
+               localPal[0xc0] = 0x0600;
+               localPal[0xd0] = 0xc000;
+               localPal[0xe0] = 0x0000; // reserved pixels for OSD
+               localPal[0xf0] = 0xffff;
+       }
+       Pico.m.dirtyPal = 1;
+
+       memset32(giz_screen, 0, 321*240*2/4);
+       if (currentConfig.EmuOpt&0x8000) {
+               fb_unlock();
+               giz_screen = fb_lock(0);
+               memset32(giz_screen, 0, 321*240*2/4);
+       }
+       fb_unlock();
+       giz_screen = NULL;
+}
+
+/*
+#include <stdarg.h>
+static void stdbg(const char *fmt, ...)
+{
+       static int cnt = 0;
+       va_list vl;
+
+       sprintf(noticeMsg, "%x ", cnt++);
+       va_start(vl, fmt);
+       vsnprintf(noticeMsg+strlen(noticeMsg), sizeof(noticeMsg)-strlen(noticeMsg), fmt, vl);
+       va_end(vl);
+
+       noticeMsgTime = GetTickCount();
+}
+*/
+
+static void updateSound(int len)
+{
+       snd_all_samples += len / 2;
+       PsndOut += len / 2;
+       if (PsndOut - snd_cbuff >= snd_cbuf_samples)
+       {
+               //if (PsndOut - snd_cbuff != snd_cbuf_samples)
+               //      stdbg("snd diff is %i, not %i", PsndOut - snd_cbuff, snd_cbuf_samples);
+               PsndOut = snd_cbuff;
+       }
+}
+
+
+static void SkipFrame(void)
+{
+       PicoSkipFrame=1;
+       PicoFrame();
+       PicoSkipFrame=0;
+}
+
+/* forced frame to front buffer */
+void pemu_forced_frame(int no_scale, int do_emu)
+{
+       int po_old = PicoOpt;
+       int eo_old = currentConfig.EmuOpt;
+
+       PicoOpt &= ~0x10;
+       PicoOpt |= POPT_ACC_SPRITES;
+       if (!no_scale)
+               PicoOpt |= POPT_EN_SOFTSCALE;
+       currentConfig.EmuOpt |= 0x80;
+
+       if (giz_screen == NULL)
+               giz_screen = fb_lock(1);
+
+       PicoDrawSetOutFormat(PDF_RGB555, 0);
+       PicoDrawSetCallbacks(EmuScanBegin16, NULL);
+       Pico.m.dirtyPal = 1;
+       PicoFrameDrawOnly();
+
+       fb_unlock();
+       giz_screen = NULL;
+
+       PicoOpt = po_old;
+       currentConfig.EmuOpt = eo_old;
+}
+
+
+static void RunEvents(unsigned int which)
+{
+       if (which & 0x1800) // save or load (but not both)
+       {
+               int do_it = 1;
+
+               if (PsndOut != NULL)
+                       FrameworkAudio_SetPause(1);
+               if (giz_screen == NULL)
+                       giz_screen = fb_lock(1);
+               if ( emu_check_save_file(state_slot) &&
+                               (( (which & 0x1000) && (currentConfig.EmuOpt & 0x800)) || // load
+                                (!(which & 0x1000) && (currentConfig.EmuOpt & 0x200))) ) // save
+               {
+                       int keys;
+                       blit("", (which & 0x1000) ? "LOAD STATE? (PLAY=yes, STOP=no)" : "OVERWRITE SAVE? (PLAY=yes, STOP=no)");
+                       while( !((keys = Framework_PollGetButtons()) & (PBTN_PLAY|PBTN_STOP)) )
+                               Sleep(50);
+                       if (keys & PBTN_STOP) do_it = 0;
+                       while(  ((keys = Framework_PollGetButtons()) & (PBTN_PLAY|PBTN_STOP)) ) // wait for release
+                               Sleep(50);
+                       clearArea(0);
+               }
+
+               if (do_it)
+               {
+                       osd_text(4, 232, (which & 0x1000) ? "LOADING GAME" : "SAVING GAME");
+                       PicoStateProgressCB = emu_stateCb;
+                       emu_save_load_game((which & 0x1000) >> 12, 0);
+                       PicoStateProgressCB = NULL;
+                       Sleep(0);
+               }
+
+               if (PsndOut != NULL)
+                       FrameworkAudio_SetPause(0);
+               reset_timing = 1;
+       }
+       if (which & 0x0400) // switch renderer
+       {
+               if (PicoOpt&0x10) { PicoOpt&=~0x10; currentConfig.EmuOpt |=  0x80; }
+               else              { PicoOpt|= 0x10; currentConfig.EmuOpt &= ~0x80; }
+
+               vidResetMode();
+
+               if (PicoOpt&0x10) {
+                       strcpy(noticeMsg, " 8bit fast renderer");
+               } else if (currentConfig.EmuOpt&0x80) {
+                       strcpy(noticeMsg, "16bit accurate renderer");
+               } else {
+                       strcpy(noticeMsg, " 8bit accurate renderer");
+               }
+
+               noticeMsgTime = GetTickCount();
+       }
+       if (which & 0x0300)
+       {
+               if(which&0x0200) {
+                       state_slot -= 1;
+                       if(state_slot < 0) state_slot = 9;
+               } else {
+                       state_slot += 1;
+                       if(state_slot > 9) state_slot = 0;
+               }
+               sprintf(noticeMsg, "SAVE SLOT %i [%s]", state_slot, emu_check_save_file(state_slot) ? "USED" : "FREE");
+               noticeMsgTime = GetTickCount();
+       }
+}
+
+static void updateKeys(void)
+{
+       unsigned int keys, allActions[2] = { 0, 0 }, events;
+       static unsigned int prevEvents = 0;
+       int i;
+
+       /* FIXME: port to input fw, merge with emu.c:emu_update_input() */
+       keys = Framework_PollGetButtons();
+       if (keys & PBTN_HOME)
+               engineState = PGS_Menu;
+
+       keys &= CONFIGURABLE_KEYS;
+
+       PicoPad[0] = allActions[0] & 0xfff;
+       PicoPad[1] = allActions[1] & 0xfff;
+
+       if (allActions[0] & 0x7000) emu_DoTurbo(&PicoPad[0], allActions[0]);
+       if (allActions[1] & 0x7000) emu_DoTurbo(&PicoPad[1], allActions[1]);
+
+       events = (allActions[0] | allActions[1]) >> 16;
+
+       // volume is treated in special way and triggered every frame
+       if ((events & 0x6000) && PsndOut != NULL)
+       {
+               int vol = currentConfig.volume;
+               if (events & 0x2000) {
+                       if (vol < 100) vol++;
+               } else {
+                       if (vol >   0) vol--;
+               }
+               FrameworkAudio_SetVolume(vol, vol);
+               sprintf(noticeMsg, "VOL: %02i ", vol);
+               noticeMsgTime = GetTickCount();
+               currentConfig.volume = vol;
+       }
+
+       events &= ~prevEvents;
+       if (events) RunEvents(events);
+       if (movie_data) emu_updateMovie();
+
+       prevEvents = (allActions[0] | allActions[1]) >> 16;
+}
+
+void plat_debug_cat(char *str)
+{
+}
+
+static void simpleWait(DWORD until)
+{
+       DWORD tval;
+       int diff;
+
+       tval = GetTickCount();
+       diff = (int)until - (int)tval;
+       if (diff >= 2)
+               Sleep(diff - 1);
+
+       while ((tval = GetTickCount()) < until && until - tval < 512) // some simple overflow detection
+               spend_cycles(1024*2);
+}
+
+void pemu_loop(void)
+{
+       static int PsndRate_old = 0, PicoOpt_old = 0, pal_old = 0;
+       char fpsbuff[24]; // fps count c string
+       DWORD tval, tval_prev = 0, tval_thissec = 0; // timing
+       int frames_done = 0, frames_shown = 0, oldmodes = 0, sec_ms = 1000;
+       int target_fps, target_frametime, lim_time, tval_diff, i;
+       char *notice = NULL;
+
+       lprintf("entered emu_Loop()\n");
+
+       fpsbuff[0] = 0;
+
+       // make sure we are in correct mode
+       vidResetMode();
+       if (currentConfig.scaling) PicoOpt|=0x4000;
+       else PicoOpt&=~0x4000;
+       Pico.m.dirtyPal = 1;
+       oldmodes = ((Pico.video.reg[12]&1)<<2) ^ 0xc;
+
+       // pal/ntsc might have changed, reset related stuff
+       target_fps = Pico.m.pal ? 50 : 60;
+       target_frametime = Pico.m.pal ? (1000<<8)/50 : (1000<<8)/60+1;
+       reset_timing = 1;
+
+       // prepare CD buffer
+       if (PicoAHW & PAHW_MCD) PicoCDBufferInit();
+
+       // prepare sound stuff
+       PsndOut = NULL;
+       if (currentConfig.EmuOpt & 4)
+       {
+               int ret, snd_excess_add, stereo;
+               if (PsndRate != PsndRate_old || (PicoOpt&0x0b) != (PicoOpt_old&0x0b) || Pico.m.pal != pal_old) {
+                       PsndRerate(Pico.m.frame_count ? 1 : 0);
+               }
+               stereo=(PicoOpt&8)>>3;
+               snd_excess_add = ((PsndRate - PsndLen*target_fps)<<16) / target_fps;
+               snd_cbuf_samples = (PsndRate<<stereo) * 16 / target_fps;
+               lprintf("starting audio: %i len: %i (ex: %04x) stereo: %i, pal: %i\n",
+                       PsndRate, PsndLen, snd_excess_add, stereo, Pico.m.pal);
+               ret = FrameworkAudio_Init(PsndRate, snd_cbuf_samples, stereo);
+               if (ret != 0) {
+                       lprintf("FrameworkAudio_Init() failed: %i\n", ret);
+                       sprintf(noticeMsg, "sound init failed (%i), snd disabled", ret);
+                       noticeMsgTime = GetTickCount();
+                       currentConfig.EmuOpt &= ~4;
+               } else {
+                       FrameworkAudio_SetVolume(currentConfig.volume, currentConfig.volume);
+                       PicoWriteSound = updateSound;
+                       snd_cbuff = FrameworkAudio_56448Buffer();
+                       PsndOut = snd_cbuff + snd_cbuf_samples / 2; // start writing at the middle
+                       snd_all_samples = 0;
+                       PsndRate_old = PsndRate;
+                       PicoOpt_old  = PicoOpt;
+                       pal_old = Pico.m.pal;
+               }
+       }
+
+       // loop?
+       while (engineState == PGS_Running)
+       {
+               int modes;
+
+               tval = GetTickCount();
+               if (reset_timing || tval < tval_prev) {
+                       //stdbg("timing reset");
+                       reset_timing = 0;
+                       tval_thissec = tval;
+                       frames_shown = frames_done = 0;
+               }
+
+               // show notice message?
+               if (noticeMsgTime) {
+                       static int noticeMsgSum;
+                       if (tval - noticeMsgTime > 2000) { // > 2.0 sec
+                               noticeMsgTime = 0;
+                               clearArea(0);
+                               notice = 0;
+                       } else {
+                               int sum = noticeMsg[0]+noticeMsg[1]+noticeMsg[2];
+                               if (sum != noticeMsgSum) { clearArea(0); noticeMsgSum = sum; }
+                               notice = noticeMsg;
+                       }
+               }
+
+               // check for mode changes
+               modes = ((Pico.video.reg[12]&1)<<2)|(Pico.video.reg[1]&8);
+               if (modes != oldmodes) {
+                       oldmodes = modes;
+                       clearArea(1);
+               }
+
+               // second passed?
+               if (tval - tval_thissec >= sec_ms)
+               {
+#ifdef BENCHMARK
+                       static int bench = 0, bench_fps = 0, bench_fps_s = 0, bfp = 0, bf[4];
+                       if(++bench == 10) {
+                               bench = 0;
+                               bench_fps_s = bench_fps;
+                               bf[bfp++ & 3] = bench_fps;
+                               bench_fps = 0;
+                       }
+                       bench_fps += frames_shown;
+                       sprintf(fpsbuff, "%02i/%02i/%02i", frames_shown, bench_fps_s, (bf[0]+bf[1]+bf[2]+bf[3])>>2);
+#else
+                       if(currentConfig.EmuOpt & 2)
+                               sprintf(fpsbuff, "%02i/%02i", frames_shown, frames_done);
+#endif
+                       //tval_thissec += 1000;
+                       tval_thissec += sec_ms;
+
+                       if (PsndOut != NULL)
+                       {
+                               /* some code which tries to sync things to audio clock, the dirty way */
+                               static int audio_skew_prev = 0;
+                               int audio_skew, adj, co = 9, shift = 7;
+                               audio_skew = snd_all_samples*2 - FrameworkAudio_BufferPos();
+                               if (PsndRate == 22050) co = 10;
+                               if (PsndRate  > 22050) co = 11;
+                               if (PicoOpt&8) shift++;
+                               if (audio_skew < 0) {
+                                       adj = -((-audio_skew) >> shift);
+                                       if (audio_skew > -(6<<co)) adj>>=1;
+                                       if (audio_skew > -(4<<co)) adj>>=1;
+                                       if (audio_skew > -(2<<co)) adj>>=1;
+                                       if (audio_skew > audio_skew_prev) adj>>=2; // going up already
+                               } else {
+                                       adj = audio_skew >> shift;
+                                       if (audio_skew < (6<<co)) adj>>=1;
+                                       if (audio_skew < (4<<co)) adj>>=1;
+                                       if (audio_skew < (2<<co)) adj>>=1;
+                                       if (audio_skew < audio_skew_prev) adj>>=2;
+                               }
+                               audio_skew_prev = audio_skew;
+                               target_frametime += adj;
+                               sec_ms = (target_frametime * target_fps) >> 8;
+                               //stdbg("%i %i %i", audio_skew, adj, sec_ms);
+                               frames_done = frames_shown = 0;
+                       }
+                       else if (currentConfig.Frameskip < 0) {
+                               frames_done  -= target_fps; if (frames_done  < 0) frames_done  = 0;
+                               frames_shown -= target_fps; if (frames_shown < 0) frames_shown = 0;
+                               if (frames_shown > frames_done) frames_shown = frames_done;
+                       } else {
+                               frames_done = frames_shown = 0;
+                       }
+               }
+#ifdef PFRAMES
+               sprintf(fpsbuff, "%i", Pico.m.frame_count);
+#endif
+
+               tval_prev = tval;
+               lim_time = (frames_done+1) * target_frametime;
+               if (currentConfig.Frameskip >= 0) // frameskip enabled
+               {
+                       for (i = 0; i < currentConfig.Frameskip; i++) {
+                               updateKeys();
+                               SkipFrame(); frames_done++;
+                               if (PsndOut) { // do framelimitting if sound is enabled
+                                       int tval_diff;
+                                       tval = GetTickCount();
+                                       tval_diff = (int)(tval - tval_thissec) << 8;
+                                       if (tval_diff < lim_time) // we are too fast
+                                               simpleWait(tval + ((lim_time - tval_diff)>>8));
+                               }
+                               lim_time += target_frametime;
+                       }
+               }
+               else // auto frameskip
+               {
+                       int tval_diff;
+                       tval = GetTickCount();
+                       tval_diff = (int)(tval - tval_thissec) << 8;
+                       if (tval_diff > lim_time)
+                       {
+                               // no time left for this frame - skip
+                               if (tval_diff - lim_time >= (300<<8)) {
+                                       /* something caused a slowdown for us (disk access? cache flush?)
+                                        * try to recover by resetting timing... */
+                                       reset_timing = 1;
+                                       continue;
+                               }
+                               updateKeys();
+                               SkipFrame(); frames_done++;
+                               continue;
+                       }
+               }
+
+               updateKeys();
+
+               if (currentConfig.EmuOpt&0x80)
+                       /* be sure correct framebuffer is locked */
+                       giz_screen = fb_lock((currentConfig.EmuOpt&0x8000) ? 0 : 1);
+
+               PicoFrame();
+
+               if (giz_screen == NULL)
+                       giz_screen = fb_lock((currentConfig.EmuOpt&0x8000) ? 0 : 1);
+
+               blit(fpsbuff, notice);
+
+               if (giz_screen != NULL) {
+                       fb_unlock();
+                       giz_screen = NULL;
+               }
+
+               if (currentConfig.EmuOpt&0x2000)
+                       Framework2D_WaitVSync();
+
+               if (currentConfig.EmuOpt&0x8000)
+                       fb_flip();
+
+               // check time
+               tval = GetTickCount();
+               tval_diff = (int)(tval - tval_thissec) << 8;
+
+               if (currentConfig.Frameskip < 0 && tval_diff - lim_time >= (300<<8)) // slowdown detection
+                       reset_timing = 1;
+               else if (PsndOut != NULL || currentConfig.Frameskip < 0)
+               {
+                       // sleep if we are still too fast
+                       if (tval_diff < lim_time)
+                       {
+                               // we are too fast
+                               simpleWait(tval + ((lim_time - tval_diff) >> 8));
+                       }
+               }
+
+               frames_done++; frames_shown++;
+       }
+
+
+       if (PicoAHW & PAHW_MCD) PicoCDBufferFree();
+
+       if (PsndOut != NULL) {
+               PsndOut = snd_cbuff = NULL;
+               FrameworkAudio_Close();
+       }
 
-char romFileName[MAX_PATH];
-int engineState;
-currentConfig_t currentConfig;
-
-unsigned char *rom_data = NULL;
-unsigned char *PicoDraw2FB = NULL;  // temporary buffer for alt renderer
-int state_slot = 0;
-int reset_timing = 0;
-int config_slot = 0, config_slot_current = 0;
-
-
-
-
-int  emu_ReloadRom(void){}
-void emu_Init(void){}
-void emu_Deinit(void){}
-int  emu_SaveLoadGame(int load, int sram){}
-void emu_Loop(void){}
-void emu_ResetGame(void){}
-int  emu_ReadConfig(int game, int no_defaults){}
-int  emu_WriteConfig(int game){}
-char *emu_GetSaveFName(int load, int is_sram, int slot){}
-int  emu_check_save_file(int slot){}
-void emu_set_save_cbs(int gz){}
-void emu_forced_frame(void){}
-int  emu_cd_check(char **bios_file){}
-int  find_bios(int region, char **bios_file){}
-void scaling_update(void){}
+       // save SRAM
+       if ((currentConfig.EmuOpt & 1) && SRam.changed) {
+               emu_stateCb("Writing SRAM/BRAM..");
+               emu_save_load_game(0, 1);
+               SRam.changed = 0;
+       }
+}