void main()
__constant char **main::pscreen = &main::screen
__loadstore char * volatile main::screen // zp[2]:2 20.0
void sub(char ch , char **dst)
char sub::ch
char sub::ch#2 // reg byte a 11.0
char **sub::dst

reg byte a [ sub::ch#2 ]
zp[2]:2 [ main::screen ]
