Added an option for RAM initialization (#276).

It's possible to choose between three values:
1) 0x00
2) 0xFF (default)
3) Randomize.

src/core/common.h

@@ -53,6 +53,7 @@ enum false_value { FALSE, TRUE };
 enum exit_type { EXIT_OK, EXIT_ERROR };
 enum lower_value { LOWER, UPPER };
 enum machine_mode { AUTO, NTSC, PAL, DENDY, DEFAULT = 255 };
+enum initial_ram_value_type { IRV_0X00, IRV_0XFF, IRV_RANDOM };
 enum console_type {
 	REGULAR_NES,
 	VS_SYSTEM,

src/core/conf.h

@@ -53,6 +53,7 @@ typedef struct _config {
 	BYTE ntsc_format;
 	BYTE palette;
 	BYTE disable_swap_emphasis_pal;
+	BYTE initial_ram_value;
 	BYTE vsync;
 	BYTE integer_scaling;
 	BYTE stretch;

src/core/cpu.c

@@ -1062,7 +1062,7 @@ void cpu_turn_on(void) {
 			 *  state of any registers after Power-UP and especially
 			 *  not the stack register and WRAM ($0000-$07FF).
 			 */
-			memset(mmcpu.ram, 0xFF, sizeof(mmcpu.ram));
+			emu_initial_ram(mmcpu.ram, sizeof(mmcpu.ram));
 
 			/*
 			 * questo workaround serve solo per

src/core/emu.c

@@ -667,8 +667,6 @@ BYTE emu_reset(BYTE type) {
 
 	info.first_illegal_opcode = FALSE;
 
-	srand(time(0));
-
 	tas.lag_next_frame = TRUE;
 	tas.lag_actual_frame = TRUE;
 
@@ -1162,6 +1160,20 @@ void emu_info_rom(void) {
 
 	log_info_box(uL("CRC32;%08X"), info.crc32.total);
 }
+void emu_initial_ram(BYTE *ram, unsigned int length) {
+	unsigned int i;
+
+	if (!ram || !length) {
+		return;
+	}
+	for (i = 0; i < length; i++) {
+		ram[i] = cfg->initial_ram_value == IRV_0X00
+			? 0x00
+			: cfg->initial_ram_value == IRV_0XFF
+				? 0xFF
+				: rand();
+	}
+}
 
 INLINE static void emu_frame_started(void) {
 	tas.lag_next_frame = TRUE;

src/core/emu.h

@@ -49,6 +49,7 @@ EXTERNC uTCHAR *emu_rand_str(void);
 EXTERNC void emu_ctrl_doublebuffer(void);
 EXTERNC void emu_frame_input_and_rewind(void);
 EXTERNC void emu_info_rom(void);
+EXTERNC void emu_initial_ram(BYTE *ram, unsigned int length);
 
 #undef EXTERNC
 

src/core/mappers.c

@@ -1537,13 +1537,11 @@ BYTE map_prg_ram_malloc(WORD size) {
 	return (EXIT_OK);
 }
 void map_prg_ram_memset(void) {
-	int value = 0x00;
-
 	if (info.mapper.id == FDS_MAPPER) {
-		value = 0xEA;
+		memset(prg.ram.data, 0xEA, prg.ram.size);
+	} else {
+		emu_initial_ram(prg.ram.data, prg.ram.size);
 	}
-
-	memset(prg.ram.data, value, prg.ram.size);
 }
 void map_prg_ram_battery_save(void) {
 	/* se c'e' della PRG Ram battery packed la salvo in un file */

src/core/mappers/mapper_Namco.c

@@ -23,6 +23,7 @@
 #include "mem_map.h"
 #include "cpu.h"
 #include "save_slot.h"
+#include "emu.h"
 
 #define n163_prg_rom_8k_update(slot)\
 	control_bank_with_AND(0x3F, info.prg.rom.max.banks_8k)\
@@ -96,11 +97,12 @@ void map_init_Namco(BYTE model) {
 
 			if (info.reset >= HARD) {
 				memset(&n163, 0x00, sizeof(n163));
+				emu_initial_ram(n163.snd_ram, sizeof(n163.snd_ram));
 				n163.snd_ch_start = 7;
 				n163.snd_auto_inc = 1;
 			} else {
 				memset(&n163.ch, 0x00, sizeof(n163.ch));
-				memset(&n163.snd_ram, 0x00, sizeof(n163.snd_ram));
+				emu_initial_ram(n163.snd_ram, sizeof(n163.snd_ram));
 				memset(&n163.snd_wave, 0x00, sizeof(n163.snd_wave));
 				n163.irq_delay = FALSE;
 				n163.snd_ch_start = 7;

src/gui/designer/resources.qrc

@@ -13,6 +13,7 @@
     <file>icons/cassette_tape.svgz</file>
     <file>icons/cassette_tape_play.svgz</file>
     <file>icons/cassette_tape_record.svgz</file>
+    <file>icons/hexadecimal.svgz</file>
     <file>icons/cassette_tape_stop.svgz</file>
     <file>icons/channels.svgz</file>
     <file>icons/cheat.svgz</file>

src/gui/designer/translations/en_EN.ts

@@ -2523,6 +2523,26 @@
         <source>German</source>
         <translation type="unfinished"></translation>
     </message>
+    <message>
+        <source>0x00</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>Random</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>Initial RAM value</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>RAM</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>0xFF</source>
+        <translation type="unfinished"></translation>
+    </message>
 </context>
 <context>
     <name>wdgSettingsInput</name>

src/gui/designer/wdgSettingsAudio.ui

@@ -6,7 +6,7 @@
    <rect>
     <x>0</x>
     <y>0</y>
-    <width>573</width>
+    <width>733</width>
     <height>580</height>
    </rect>
   </property>
@@ -182,6 +182,11 @@
         </item>
         <item>
          <widget class="QPushButton" name="pushButton_Samplarate_44100">
+          <property name="font">
+           <font>
+            <underline>true</underline>
+           </font>
+          </property>
           <property name="text">
            <string>44100</string>
           </property>
@@ -249,6 +254,11 @@
         </item>
         <item>
          <widget class="QPushButton" name="pushButton_Channels_Stereo_Delay">
+          <property name="font">
+           <font>
+            <underline>true</underline>
+           </font>
+          </property>
           <property name="text">
            <string>Stereo Delay</string>
           </property>

src/gui/designer/wdgSettingsCheats.ui

@@ -101,6 +101,11 @@
         </property>
         <item>
          <widget class="QPushButton" name="pushButton_Cheats_Mode_disabled">
+          <property name="font">
+           <font>
+            <underline>true</underline>
+           </font>
+          </property>
           <property name="text">
            <string>Disabled</string>
           </property>