replace texture jump table with dispatch table

(cherry picked from commit 88f10f9f06)

src/main.asm

@@ -1,19 +1,6 @@
 include consts/screen
 
-;
-;   Screen initialization
-;
-
-; r1 = screen parameter value
-mov r1, screen.mode_index
-screen r1, screen.mode_value
-
-mov r1, screen.offset_index
-add r2, zr, ptr.screen
-screen r1, r2
-
-mov r1, screen.resolution_index
-screen r1, screen.resolution_value
+include init
 
 call drawing.draw_whole_map