second: work on intro scrolling

demos/second/TODO

@@ -13,6 +13,26 @@ TODO MUSIC
 
 DISK I
 
++BIOS
+
+  - get it working
+  - if it is, remove other detection code
+
++ Intro
+  - title cards
+  - scrolling
+  - credits at bottom?
+
+  - Sprites / explosion
+
++ chessboard
+
+  - falling effect
+  - moving / bouncing object
+  - tunnel
+  - cirles
+  - interference pattern
+
 + Lens / Rotozoom
   - add lo-res LENS sprite to bounce around
   - for rotozoom, wrap around

demos/second/part01_intropan/tools/Makefile

@@ -0,0 +1,16 @@
+CC = gcc
+CFLAGS = -Wall -O2
+LFLAGS =
+
+all:	make_scroll_tables
+
+make_scroll_tables:	make_scroll_tables.o
+	$(CC) $(LFLAGS) -o make_scroll_tables make_scroll_tables.o
+
+make_scroll_tables.o:	make_scroll_tables.c
+	$(CC) $(CFLAGS) -c make_scroll_tables.c
+
+clean:	
+	rm -f make_scroll_tables *.o *~
+
+

demos/second/part01_intropan/tools/make_scroll_tables.c

@@ -0,0 +1,50 @@
+#include <stdio.h>
+
+int main(int argc, char **argv) {
+
+	int i,high_bit,temp;
+
+	printf("left_lookup_main:\n");
+	for(i=0;i<256;i++) {
+		if (i%16==0) {
+			printf(".byte ");
+		}
+
+		high_bit=i&0x80;
+
+		temp=i&0x7f;
+		temp>>=2;
+		temp|=high_bit;
+
+		printf("$%02X",temp);
+
+		if (i%16!=15) {
+			printf(",");
+		}
+		else {
+			printf("\n");
+		}
+
+	}
+
+	printf("left_lookup_next:\n");
+	for(i=0;i<256;i++) {
+		if (i%16==0) {
+			printf(".byte ");
+		}
+
+		temp=i&0x3;
+		temp<<=5;
+
+		printf("$%02X",temp);
+
+		if (i%16!=15) {
+			printf(",");
+		}
+		else {
+			printf("\n");
+		}
+
+	}
+	return 0;
+}