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authorDimitri Sokolyuk <ds@doozer.de>2017-05-23 17:06:09 +0200
committerDimitri Sokolyuk <ds@doozer.de>2017-05-23 17:06:09 +0200
commit6f86ce7057dd7cd1b491e8f09501258822d2ea74 (patch)
treeb3bfa11f0f72d0e1ca7c84d948af20b7494dd26b /j1demo/firmware/sprite.fs
Import j1demo
Diffstat (limited to 'j1demo/firmware/sprite.fs')
-rw-r--r--j1demo/firmware/sprite.fs20
1 files changed, 20 insertions, 0 deletions
diff --git a/j1demo/firmware/sprite.fs b/j1demo/firmware/sprite.fs
new file mode 100644
index 0000000..877917a
--- /dev/null
+++ b/j1demo/firmware/sprite.fs
@@ -0,0 +1,20 @@
+( Sprite low-level JCB 15:23 11/15/10)
+
+: vga-line@
+ begin
+ vga_line @
+ vga_line @
+ over xor
+ while
+ drop
+ repeat
+;
+
+: waitblank begin vga-line@ d# 512 = until ;
+
+: sprite! ( x y spr -- )
+ 2* cells vga_spritey + tuck ! 2- ! ;
+
+: hide \ hide all the sprites at (800,800)
+ d# 8 0do d# 800 dup i sprite! loop ;
+