USE: java Z80compiler in.z80 out.obj

COMMANDS:

label: - creates a label that can be jumped to with the goto command
goto label - jumps to label label
var name - creates a variable named name, can be used anywhere in code
set var value - sets variable var equal to value (can be either a number or another variable)
end - ends the program (z80 opcode HALT)
# anything - comment; any text after a # is ignored by the program until the end of the line
out port value - outputs value (either number or variable name) to port port
in port var - reads port port into variable var
inc var - increases variable var
dec var - decreases variable var
add var value - adds value (number or other variable) to variable var
sub var value - subtracts value (number or other variable) from variable var
if var = / != value - if variable var equals (=) or doesn't equal (!=) value (number or variable), all code is run until endif is reached (see example)
endif - ends an if statement
NOTE: if statements may be nested, but an endif closes the most recent if statement
call label - calls sub routine at label (see example)
return - returns from current subroutine