@begin: scope:[]  from
  [0] phi()
  to:@1
@1: scope:[]  from @begin
  [1] phi()
  [2] call main 
  to:@end
@end: scope:[]  from @1
  [3] phi()

(void()) main()
main: scope:[main]  from @1
  asm { sei  }
  to:main::@1
main::@1: scope:[main]  from main main::@2 main::@3
  [5] if(*((const byte*) RASTER)<(byte) $1e) goto main::@2
  to:main::@3
main::@3: scope:[main]  from main::@1
  [6] *((const byte*) BGCOL) ← (byte) 0
  to:main::@1
main::@2: scope:[main]  from main::@1
  [7] phi()
  [8] call incScreen 
  to:main::@1

(void()) incScreen()
incScreen: scope:[incScreen]  from main::@2
  [9] *((const byte*) BGCOL) ← *((const byte*) RASTER)
  to:incScreen::@return
incScreen::@return: scope:[incScreen]  from incScreen
  [10] return 
  to:@return
