CALL RET does not work

[matthias-dunkel]

The following code is not working:

MAIN: 
    CALL END
END:
    RET

[MalteT]

What would you expect to happen?
There's at least a missing #! mrasm at the beginning of the program. There is also no stackpointer initialization. When CALLing END, the stackpointer is decreased to 0xFF which triggers a hardware stop since the stack is capped to prevent you from using your I/O (0xEF and upwards, if I remember correctly) for the stack.