initial import from old sources

2016-02-28 22:35:46 +01:00
parent 25f4482641
commit eb96a90e5f
4 changed files with 93 additions and 0 deletions
--- a/libsrc/vic20/waitvblank.s
+++ b/libsrc/vic20/waitvblank.s
@@ -0,0 +1,16 @@
+        .export         _waitvblank
+
+        .include        "vic20/vic20.inc"
+
+_waitvblank:
+        lda     PALFLAG
+        beq     @ntsc
+        ldx     #(312-8)/2
+        .byte $2c
+@ntsc:
+        ldx     #(262-8)/2
+@l2:
+        cpx     VIC_HLINE
+        bcs     @l2
+        rts
+