bugfixes, cd/Memory.s

git-svn-id: file:///home/notaz/opt/svn/PicoDrive/platform@70 be3aeb3a-fb24-0410-a615-afba39da0efa

gp2x/940ctl.c

@@ -99,7 +99,13 @@ int YM2612Write_940(unsigned int a, unsigned int v)
 
 	switch( a ) {
 	case 0:	/* address port 0 */
+		if (!addr_A1 && ST_address == v)
+			return 0;	/* address already selected, don't send this command to 940 */
 		ST_address = v;
+		/* don't send DAC or timer related address changes to 940 */
+		if (!addr_A1 && (v & 0xf0) == 0x20 &&
+			(v == 0x24 || v == 0x25 || v == 0x26 || v == 0x2a))
+				return 0;
 		addr_A1 = 0;
 		//ret=0;
 		break;
@@ -162,6 +168,8 @@ int YM2612Write_940(unsigned int a, unsigned int v)
 		break;
 
 	case 2:	/* address port 1 */
+		if (addr_A1 && ST_address == v)
+			return 0;
 		ST_address = v;
 		addr_A1 = 1;
 		//ret=0;
@@ -186,7 +194,7 @@ int YM2612Write_940(unsigned int a, unsigned int v)
 				shared_ctl->writebuff1[writebuff_ptr++] = (a<<8)|v;
 			}
 		} else {
-			printf("warning: writebuff_ptr > 2047\n");
+			printf("warning: writebuff_ptr > 2047 ([%i] %02x)\n", a, v);
 		}
 	}
 

gp2x/Makefile

@@ -13,6 +13,7 @@ asm_render = 1
 asm_ym2612 = 1
 asm_misc = 1
 asm_cdpico = 1
+asm_cdmemory = 1
 #profile = 1
 #use_musashi = 1
 #up = 1
@@ -66,6 +67,10 @@ ifeq "$(asm_cdpico)" "1"
 DEFINC += -D_ASM_CD_PICO_C
 OBJS += ../../Pico/cd/pico_asm.o
 endif
+ifeq "$(asm_cdmemory)" "1"
+DEFINC += -D_ASM_CD_MEMORY_C
+OBJS += ../../Pico/cd/memory_asm.o
+endif
 # Pico - sound
 OBJS += ../../Pico/sound/mix_asm.o
 OBJS += ../../Pico/sound/sound.o ../../Pico/sound/sn76496.o ../../Pico/sound/ym2612.o
@@ -147,6 +152,9 @@ testrefr.gpe : test.o gp2x.o asmutils.o
 ../../Pico/cd/pico_asm.o : ../../Pico/cd/Pico.s
 	@echo $<
 	@$(AS) $(ASOPT) $< -o $@
+../../Pico/cd/memory_asm.o : ../../Pico/cd/Memory.s
+	@echo $<
+	@$(AS) $(ASOPT) $< -o $@
 
 # build Cyclone
 ../../cpu/Cyclone/proj/Cyclone.s :

gp2x/emu.c

@@ -973,21 +973,11 @@ static void updateSound(int len)
 }
 
 
-static void SkipFrame(int do_sound)
+static void SkipFrame(void)
 {
-	void *sndbuff_tmp = 0;
-	if (PsndOut && !do_sound) {
-		sndbuff_tmp = PsndOut;
-		PsndOut = 0;
-	}
-
 	PicoSkipFrame=1;
 	PicoFrame();
 	PicoSkipFrame=0;
-
-	if (sndbuff_tmp && !do_sound) {
-		PsndOut = sndbuff_tmp;
-	}
 }
 
 
@@ -1166,7 +1156,7 @@ void emu_Loop(void)
 				// when second changes, but we don't want buffer to starve.
 				if(PsndOut && frames_done < target_fps && frames_done > target_fps-5) {
 					updateKeys();
-					SkipFrame(1); frames_done++;
+					SkipFrame(); frames_done++;
 				}
 
 				frames_done  -= target_fps; if (frames_done  < 0) frames_done  = 0;
@@ -1179,7 +1169,7 @@ void emu_Loop(void)
 		if(currentConfig.Frameskip >= 0) { // frameskip enabled
 			for(i = 0; i < currentConfig.Frameskip; i++) {
 				updateKeys();
-				SkipFrame(1); frames_done++;
+				SkipFrame(); frames_done++;
 				if (PsndOut) { // do framelimitting if sound is enabled
 					gettimeofday(&tval, 0);
 					if(thissec != tval.tv_sec) tval.tv_usec+=1000000;
@@ -1191,8 +1181,14 @@ void emu_Loop(void)
 			}
 		} else if(tval.tv_usec > lim_time) { // auto frameskip
 			// no time left for this frame - skip
+			if (tval.tv_usec - lim_time >= 0x300000) {
+				/* something caused a slowdown for us (disk access? cache flush?)
+				 * try to recover by resetting timing... */
+				reset_timing = 1;
+				continue;
+			}
 			updateKeys();
-			SkipFrame(tval.tv_usec < lim_time+target_frametime); frames_done++;
+			SkipFrame(/*tval.tv_usec < lim_time+target_frametime*/); frames_done++;
 			continue;
 		}
 
@@ -1261,12 +1257,12 @@ if (Pico.m.frame_count == 31563) {
 		gettimeofday(&tval, 0);
 		if (thissec != tval.tv_sec) tval.tv_usec+=1000000;
 
-		// sleep if we are still too fast
+		if (currentConfig.Frameskip < 0 && tval.tv_usec - lim_time >= 0x300000) // slowdown detection
-		if(PsndOut != 0 || currentConfig.Frameskip < 0)
+			reset_timing = 1;
+		else if (PsndOut != NULL || currentConfig.Frameskip < 0)
 		{
+			// sleep if we are still too fast
 			// usleep sleeps for ~20ms minimum, so it is not a solution here
-			gettimeofday(&tval, 0);
-			if(thissec != tval.tv_sec) tval.tv_usec+=1000000;
 			if(tval.tv_usec < lim_time)
 			{
 				// we are too fast

gp2x/menu.c

@@ -744,7 +744,7 @@ static void draw_cd_menu_options(int menu_sel, char *b_us, char *b_eu, char *b_j
 	gp2x_text_out8(tl_x, (y+=10), "CD LEDs                    %s", (currentConfig.EmuOpt &0x0400)?"ON":"OFF"); // 3
 	gp2x_text_out8(tl_x, (y+=10), "CDDA audio (using mp3s)    %s", (currentConfig.PicoOpt&0x0800)?"ON":"OFF"); // 4
 	gp2x_text_out8(tl_x, (y+=10), "PCM audio                  %s", (currentConfig.PicoOpt&0x0400)?"ON":"OFF"); // 5
-	gp2x_text_out8(tl_x, (y+=10), "Better sync (slower)       %s", (currentConfig.PicoOpt&0x2000)?"ON":"OFF"); // 6
+	gp2x_text_out8(tl_x, (y+=10), "Better sync (slow)         %s", (currentConfig.PicoOpt&0x2000)?"ON":"OFF"); // 6
 	gp2x_text_out8(tl_x, (y+=10), "ReadAhead buffer      %s", ra_buff); // 7
 	gp2x_text_out8(tl_x, (y+=10), "Done");