tfv: get the opening screen working with page flipping

gr-sim/gr-sim.c

@@ -5,6 +5,7 @@
 #include <SDL.h>
 
 #include "gr-sim.h"
+#include "tfv_zp.h"
 
 #include "apple2_font.h"
 
@@ -548,7 +549,7 @@ static void vtabz(void) {
 
 }
 
-static void vtab(void) {
+static void rom_vtab(void) {
 	/* fb5b */
 	a=ram[CV];
 	vtabz();
@@ -566,7 +567,7 @@ static void setwnd(void) {
 	a=0x17;
 // TABV
 	ram[CV]=a;
-	vtab();
+	rom_vtab();
 }
 
 static void vline(void) {
@@ -680,7 +681,7 @@ cleop1_begin:
 	a=s;
 	a++;
 	if (a<=ram[WNDBTM]) goto cleop1_begin;
-	vtab();
+	rom_vtab();
 
 	return 0;
 }
@@ -931,7 +932,7 @@ scrl1:
 		// SCRL3
 		y=0;
 		cleolz();
-		vtab();
+		rom_vtab();
 		return;
 	}
 	s=a;
@@ -973,7 +974,7 @@ static void up(void) {
 	if (a>ram[CV]) return;
 
 	ram[CV]=ram[CV]-1;
-	vtab();
+	rom_vtab();
 }
 
 static void bs(void) {
@@ -1137,7 +1138,7 @@ static void tabv(void) {
 	// TABV
 	// fb5b
 	ram[CV]=a;
-	vtab();
+	rom_vtab();
 }
 
 void basic_vtab(int ypos) {
@@ -1328,3 +1329,37 @@ void clear_bottom(int page) {
 		hlin_double(page,0,40,i);
 	}
 }
+
+
+void vtab(int ypos) {
+	ram[CV]=ypos-1;
+}
+
+void htab(int xpos) {
+	ram[CH]=xpos-1;
+}
+
+void move_cursor(void) {
+
+	int address;
+
+	address=gr_addr_lookup[ram[CV]];
+	address+=ram[CH];
+
+	hlin_addr+=(ram[DRAW_PAGE]*4)<<8;
+
+	ram[BASL]=address&0xff;
+	ram[BASH]=address>>8;
+
+}
+
+
+void print(char *string) {
+
+	for(y=0;y<strlen(string);y++) {
+		a=string[y];
+		a=a|0x80;
+		ram[y_indirect(BASL,y)]=a;
+	}
+	ram[BASL]+=strlen(string);
+}

gr-sim/gr-sim.h

@@ -31,6 +31,10 @@ int vlin(int page, int y1, int y2, int at);
 int collision(int xx, int yy, int ground_color);
 void clear_top(int page);
 void clear_bottom(int page);
+void vtab(int ypos);
+void htab(int xpos);
+void move_cursor(void);
+void print(char *string);
 
 
 #define APPLE_UP        11

gr-sim/tfv_opener.c

@@ -39,10 +39,6 @@ static void draw_logo(void) {
 	draw_segment();
 	ram[COLOR2]=0;
 	draw_segment();
-
-	page_flip();
-
-	grsim_update();
 }
 
 int opening(void) {
@@ -51,20 +47,22 @@ int opening(void) {
 
 	ram[MATCH]=100;
 	draw_logo();
+	page_flip();
 
 	usleep(200000);
 
 	for(ram[MATCH]=0;ram[MATCH]<30;ram[MATCH]++) {
 		draw_logo();
-		grsim_update();
+		page_flip();
 
 		usleep(20000);
 	}
 
-	basic_vtab(21);
+	vtab(21);
-	basic_htab(9);
+	htab(9);
-	basic_print("A VMW SOFTWARE PRODUCTION");
+	move_cursor();
-	grsim_update();
+	print("A VMW SOFTWARE PRODUCTION");
+	page_flip();
 
 	repeat_until_keypressed();
 

gr-sim/tfv_title.c

@@ -20,8 +20,8 @@ int title(void) {
 
 	home();
 
-	grsim_unrle(title_rle,0x800);
+	grsim_unrle(title_rle,0xc00);
-	gr_copy(0x800,0x400);
+	gr_copy(0xc00,0x400);
 
 	grsim_update();
 

gr-sim/tfv_utils.c

@@ -100,5 +100,8 @@ void page_flip(void) {
 		ram[DISP_PAGE]=0;
 		ram[DRAW_PAGE]=1;
 	}
+
+	grsim_update();
+
 }