x16 r39: fix screen colors after changing screen mode

docs/source/todo.rst

@@ -4,12 +4,10 @@ TODO
 For next release
 ^^^^^^^^^^^^^^^^
 - x16: new vera memory layout https://github.com/commanderx16/x16-rom/issues/185
-   (partly)broken examples: colorbars, rasterbars, tehtriz, testvtui
+   (partly)broken examples: colorbars (no bars), testvtui (VTUI lib not updated for new r39 yet)
-   something is wrong with the screen colors. Palette offset?
 - x16: optimize diskio load_raw because headerless files are now supported https://github.com/commanderx16/x16-rom/pull/216
   note: must still work on c64/c128 that don't have this!
-- x16: fix the separate applications as well (assembler, wormfood, ...)
+- x16: fix the separate applications as well (assembler, ...)
-- x16: fix Petaxian colors.
 
 - vm codegen: When
 - vm codegen: Pipe expression

examples/cx16/colorbars.p8

@@ -7,9 +7,11 @@ main {
     sub start() {
         ; make palette color 1 black so we can print black letters over the background color 0
         void cx16.screen_mode(3, false)
+        txt.color2(1,0)           ; make sure correct screen colors are (re)set
+        txt.clear_screen()
+
         cx16.vpoke(1, $fa02, $0)
         cx16.vpoke(1, $fa03, $0)
-        txt.color(1)
         txt.plot(13,12)
         txt.print("amiga-inspired")
         txt.plot(10,14)

examples/cx16/rasterbars.p8

@@ -9,6 +9,9 @@ main {
 
     sub start() {
         void cx16.screen_mode(3, false)
+        txt.color2(14,0)           ; make sure correct screen colors are (re)set
+        txt.clear_screen()
+
         txt.plot(14,14)
         txt.print("raster bars!")
 

examples/cx16/tehtriz.p8

@@ -33,6 +33,9 @@ main {
 
     sub start() {
         void cx16.screen_mode(3, false)     ; low res
+        txt.color2(7,0)                     ; make sure correct screen colors are (re)set
+        txt.clear_screen()
+
         sound.init()
         newGame()
         drawBoard()

examples/test.p8

@@ -14,6 +14,10 @@ main {
         txt.setcc2(11,4,'*',$05)
         txt.setcc2(12,4,'*',$d0)
 
+        sys.wait(100)
+        cx16.screen_mode(0, false)
+        sys.wait(100)
+
 
 ;        byte[] barr = [-1,-2,-3]
 ;        uword[] uwarr = [1111,2222,3333]