tfv: move random number generator to own file

gr-sim/tfv/Makefile

@@ -106,6 +106,9 @@ tfv_map.o:	tfv_map.c
 tfv_opener.o:	tfv_opener.c ../tfv_utils.h
 	$(CC) $(CFLAGS) -c tfv_opener.c
 
+tfv_random.o:	tfv_random.c
+	$(CC) $(CFLAGS) -c tfv_random.c
+
 tfv_sprites.o:	tfv_sprites.c tfv_sprites.c
 	$(CC) $(CFLAGS) -c tfv_sprites.c
 
@@ -132,14 +135,14 @@ tfv.o:	tfv.c ../gr-sim.h tfv_backgrounds.h tfv_sprites.h
 tfv:	tfv.o tfv_backgrounds.o tfv_battle.o tfv_credits.o tfv_dialog.o \
 		tfv_ending.o tfv_flying.o \
 		tfv_game_over.o tfv_help.o tfv_info.o tfv_map.o \
-		tfv_opener.o tfv_sprites.o tfv_textentry.o \
+		tfv_opener.o tfv_random.o tfv_sprites.o tfv_textentry.o \
 		tfv_title.o tfv_worldmap.o tfv_mapinfo.h \
 		$(GR_SIM)
 	$(CC) $(LFLAGS) $(SDL_LIBS) -o tfv tfv.o \
 		tfv_backgrounds.o tfv_battle.o tfv_credits.o tfv_dialog.o \
 		tfv_ending.o tfv_flying.o \
 		tfv_game_over.o tfv_help.o tfv_info.o tfv_map.o \
-		tfv_opener.o tfv_sprites.o tfv_textentry.o \
+		tfv_opener.o tfv_random.o  tfv_sprites.o tfv_textentry.o \
 		tfv_title.o tfv_worldmap.o \
 		$(GR_SIM)
 

gr-sim/tfv/tfv_battle.c

@@ -167,26 +167,6 @@ static struct enemy_type enemies[8]={
 	},
 };
 
-
-// http://codebase64.org/doku.php?id=base:small_fast_8-bit_prng
-static int random_8(void) {
-
-	static int seed=0x1f;
-	static int newseed;
-
-	newseed=seed;					// lda seed
-	if (newseed==0) goto doEor;			// beq doEor
-	newseed<<=1;					// asl
-	if (newseed==0) goto noEor;			//beq noEor
-					// if the input was $80, skip the EOR
-	if (!(newseed&0x100)) goto noEor;		// bcc noEor
-doEor:
-	newseed^=0x1d;					// eor #$1d
-noEor:
-	seed=(newseed&0xff);				// sta seed
-	return seed;
-}
-
 static int gr_put_num(int xx,int yy,int number) {
 
 	int xt=xx,digit,left,hundreds;

gr-sim/tfv/tfv_definitions.h

@@ -35,3 +35,5 @@ int world_map(void);
 int city_map(void);
 
 int credits(void);
+
+int random_8(void);

gr-sim/tfv/tfv_random.c

@@ -0,0 +1,19 @@
+// http://codebase64.org/doku.php?id=base:small_fast_8-bit_prng
+int random_8(void) {
+
+	static int seed=0x1f;
+	static int newseed;
+
+	newseed=seed;					// lda seed
+	if (newseed==0) goto doEor;			// beq doEor
+	newseed<<=1;					// asl
+	if (newseed==0) goto noEor;			//beq noEor
+					// if the input was $80, skip the EOR
+	if (!(newseed&0x100)) goto noEor;		// bcc noEor
+doEor:
+	newseed^=0x1d;					// eor #$1d
+noEor:
+	seed=(newseed&0xff);				// sta seed
+	return seed;
+}
+

gr-sim/tfv/tfv_title.c

@@ -10,7 +10,7 @@
 
 static char *title_menu[]={
 	"NEW GAME",
-	"LOAD GAME",
+	"LOAD GAME (DOES NOT WORK)",
 	"CREDITS",
 };