don't use constructor to setup runtime stack

[cc65] / libsrc / apple2 / _scrsize.s

diff --git a/libsrc/apple2/_scrsize.s b/libsrc/apple2/_scrsize.s
index 269f12a27f90522683ab464ab0c630352543a9e3..62988ae16e8c47d29ff6c75a7ce5804c1ae170f8 100644 (file)
--- a/libsrc/apple2/_scrsize.s
+++ b/libsrc/apple2/_scrsize.s
@@ -4,12 +4,14 @@
 ; Screen size variables
 ;
 
-       .export         screensize
+        .export                screensize
 
-.proc   screensize
+        .include        "apple2.inc"
 
-       ldx     #40
-       ldy     #24
+screensize:
+        ldx    WNDWDTH
+        lda    WNDBTM
+        sec
+        sbc    WNDTOP
+        tay
         rts
-
-.endproc