added help messages for the configfile and updated the readme and install to reflect libpng and zlib

Imported-from: https://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@396

src/cpu/cpu.cpp

@@ -170,5 +170,6 @@ void CPU_Init(Section* sec) {
 
 	reg_al=0;
 	reg_ah=0;
+    MSG_Add("CPU_CONFIGFILE_HELP","The amount of cycles to execute each loop. Lowering this setting will slowdown dosbox\n");
 }
 

src/debug/debug.cpp

@@ -706,6 +706,7 @@ void DEBUG_Init(Section* sec) {
 	#ifdef WIN32
 	WIN32_Console();
 	#endif
+    MSG_Add("DEBUG_CONFIGFILE_HELP","Nothing to setup yet!\n");
 	memset((void *)&dbg,0,sizeof(dbg));
 	debugging=false;
 	dbg.active_win=3;

src/dos/dos.cpp

@@ -830,6 +830,7 @@ static Bitu DOS_20Handler(void) {
 
 
 void DOS_Init(Section* sec) {
+    MSG_Add("DOS_CONFIGFILE_HELP","Setting a memory size to 0 will disable it.\n");
 	call_20=CALLBACK_Allocate();
 	CALLBACK_Setup(call_20,DOS_20Handler,CB_IRET);
 	RealSetVec(0x20,CALLBACK_RealPointer(call_20));

src/dosbox.cpp

@@ -123,7 +123,8 @@ static void DOSBOX_RealInit(Section * sec) {
 	Section_prop * section=static_cast<Section_prop *>(sec);
 	/* Initialize some dosbox internals */
 	errorlevel=section->Get_int("warnings");
-	LastTicks=GetTicks();
+	MSG_Add("DOSBOX_CONFIGFILE_HELP","General Dosbox settings\n");
+    LastTicks=GetTicks();
 	DOSBOX_SetLoop(&Normal_Loop);
 	MSG_Init(section);
 }
@@ -137,7 +138,7 @@ void DOSBOX_Init(void) {
 	/* Setup all the different modules making up DOSBox */
 	
 	secprop=control->AddSection_prop("dosbox",&DOSBOX_RealInit);
-	secprop->Add_string("language","");
+    secprop->Add_string("language","");
 	secprop->Add_int("warnings",4);
 	
 	secprop->AddInitFunction(&MEM_Init);
@@ -191,7 +192,7 @@ void DOSBOX_Init(void) {
 	secprop->Add_int("xmssize",8);
 
 	secline=control->AddSection_line("autoexec",&AUTOEXEC_Init);
-
+    
 	control->SetStartUp(&SHELL_Init);	
 
 #if C_FPU

src/gui/sdlmain.cpp

@@ -225,6 +225,7 @@ static void GUI_ShutDown(Section * sec) {
 }
 
 static void GUI_StartUp(Section * sec) {
+    MSG_Add("SDL_CONFIGFILE_HELP","SDL related options.\n");
 	sec->AddDestroyFunction(&GUI_ShutDown);
 	Section_prop * section=static_cast<Section_prop *>(sec);
 	sdl.active=false;
@@ -507,7 +508,7 @@ int main(int argc, char* argv[]) {
 #endif
 		) < 0 ) E_Exit("Can't init SDL %s",SDL_GetError());
 		Section_prop * sdl_sec=control->AddSection_prop("SDL",&GUI_StartUp);
-		sdl_sec->Add_bool("FULLSCREEN",false);
+		sdl_sec->Add_bool("fullscreen",false);
 		/* Init all the dosbox subsystems */
 		DOSBOX_Init();
 		std::string config_file;
@@ -529,7 +530,7 @@ int main(int argc, char* argv[]) {
 			JOYSTICK_Enable(0,true);
 		}
 #endif	
-		if (control->cmdline->FindExist("-fullscreen") || sdl_sec->Get_bool("FULLSCREEN")) {
+		if (control->cmdline->FindExist("-fullscreen") || sdl_sec->Get_bool("fullscreen")) {
 			SwitchFullScreen();
 		}
 		/* Start up main machine */

src/hardware/mixer.cpp

@@ -218,6 +218,7 @@ static void MIXER_CallBack(void * userdata, Uint8 *stream, int len) {
 
 
 void MIXER_Init(Section* sec) {
+    MSG_Add("MIXER_CONFIGFILE_HELP","Nothing to setup yet!\n");
 	/* Initialize the internal stuff */
 	first_channel=0;
 	mix_ticks=GetTicks();

src/hardware/pcspeaker.cpp

@@ -96,6 +96,7 @@ static void PCSPEAKER_CallBack(Bit8u * stream,Bit32u len) {
 }
 
 void PCSPEAKER_Init(Section* sec) {
+    MSG_Add("SPEAKER_CONFIGFILE_HELP","pcspeaker related options.\n");
 	spkr.chan=MIXER_AddChannel(&PCSPEAKER_CallBack,SPKR_RATE,"PC-SPEAKER");
 	MIXER_Enable(spkr.chan,false);
 	MIXER_SetMode(spkr.chan,MIXER_16MONO);

src/hardware/sblaster.cpp

@@ -557,6 +557,7 @@ static void SB_Enable(bool enable) {
 }
 
 void SBLASTER_Init(Section* sec) {
+    MSG_Add("SBLASTER_CONFIGFILE_HELP","Sound Blaster related options.\n");
 	Section_prop * section=static_cast<Section_prop *>(sec);
 	if(!section->Get_bool("enabled")) return;
 	sb.chan=MIXER_AddChannel(&SBLASTER_CallBack,22050,"SBLASTER");

src/ints/bios.cpp

@@ -208,6 +208,7 @@ void BIOS_SetupKeyboard(void);
 void BIOS_SetupDisks(void);
 
 void BIOS_Init(Section* sec) {
+    MSG_Add("BIOS_CONFIGFILE_HELP","Nothing to setup yet!\n");
 	/* Clear the Bios Data Area */
 	for (Bit16u i=0;i<1024;i++) real_writeb(0x40,i,0);
 	/* Setup all the interrupt handlers the bios controls */

src/misc/setup.cpp

@@ -41,7 +41,7 @@ void Prop_string::SetValue(char* input){
 	
 void Prop_bool::SetValue(char* input){
 	input=trim(input);
-	if((input[0]=='0') ||(input[0]=='D')||( (input[0]=='O') && (input[0]=='F'))){
+	if((input[0]=='0') ||(input[0]=='D')||( (input[0]=='O') && (input[0]=='F'))||(input[0]=='f')){
 		__value._bool=false;
 	}else{
 		__value._bool=true;
@@ -231,6 +231,7 @@ void Config::ParseConfigFile(const char* configfilename){
 		case '%':
 		case '\0':
 		case '\n':
+        case '#':
 		case ' ':
 			continue;
 			break;

src/shell/shell.cpp

@@ -134,6 +134,7 @@ void DOS_Shell::SyntaxError(void) {
 
 
 void AUTOEXEC_Init(Section * sec) {
+    MSG_Add("AUTOEXEC_CONFIGFILE_HELP","Add here the lines you want to execute on startup.\n");
 	/* Register a virtual AUOEXEC.BAT file */
 
 	Section_line * section=static_cast<Section_line *>(sec);