git.sur5r.net Git - cc65/blob - libsrc/apple2/_scrsize.s

   1 ;
   2 ; Ullrich von Bassewitz, 26.10.2000
   3 ;
   4 ; Screen size variables
   5 ;
   6
   7         .export         screensize
   8
   9         .include        "apple2.inc"
  10
  11 screensize:
  12         ldx     WNDWDTH
  13         lda     WNDBTM
  14         sec
  15         sbc     WNDTOP
  16         tay
  17         rts