Variables
A variable starts with a letter, has up to 32 significant characters, and
can include numbers, letters.
	bob
	b12
	Freemont3

Numeric Constants
Numeric constants start with a digit (0-9) and contain any number of digits.
The constants can be from 0 to 65535.
	0
	35
	432
	7730
String Constants
Starting with a " and end with a newline, end of file or ". Strings can be at most 255 characters long.
	"Hello there"
	"134"
	"We all love you

Reserved Words
There are certain variable names that are reserved for future use:
	as call case chr close default else end esac for format gosub
	goto if in input lprint open out output peek poke print readblock
	return then when writeblock

Labels and Line numbers
For purposes of goto and gosub, lines can begin with a label or line number:
	goto Start
	Red: print "Hello Red."
	gosub 1000
	end
	1000: print "How's it going?"
	return
	Start:
	goto Red
<location>: -- either a label or line number
end -- ends a program
goto <location> -- transfers control to the label or number
gosub <location> -- transfers control to the label or number until "return"
return -- returns from a subroutine
call <address> -- call a machine language subroutine

Assigment and math
Variables can be assigned constants, variables or the result of any valid 
expression.
	bob=5
	fred=bob
	greg=bob+fred
Supported operators
	+ addition
	- subtraction
	and bitwise and
	or bitwise or
	xor bitwise exclusive or
	not boolean not (results in 1 or 0)
	= equal
	< less than
	>= greater than or equal
	> greater than
	<= less than or equal
	<> not equal (also != or ><)
Built in functions
	chr$( <value> ) -- creates a character from an ascii number
	input( <fileid> ) -- reads 1 character from keyboard or file
	input( <fileid> , <count> ) -- reads a string from keyboard for file
	peek( <address> ) -- reads memory
	in( <port> ) -- reads IO Port

Conditionals
There are two types of conditional branching supported the IF-THEN-ELSE
clause and the CASE-WHEN-DEFAULT-ESAC clause.
	IF <cond> THEN <statment list> [ ELSE <statement list> ]
<cond> is the condition which is true when non-zero (the THEN
clause is executed in this situation)  If there is an else clause, 
it is executed when <cond> is 0.
	CASE <expr>
	WHEN <expr 2>:
		<statement lines>
	[ WHEN <expr 3>: <statement lines>
		...
	WHEN <expr n>: <statement lines>
	]
	[DEFAULT: <statement lines>]
	ESAC
With CASE, the value in <expr> is compared with each of the <expr 2> to <expr n>
and the matching WHEN clause statements are executed.  If there is no match, 
then the DEFAULT cluse is executed (if any).

Examples
	if bob then print "Hello bob"
	if fred-5 then print "What's up?" else print "Hi fred"
	case greg
	when 3:
		print "Greg is 3"
	when 2:
		print "This is it my friend."
		if bob then print "What"
	when 1:
		greg=3:bob=2-greg:val=greg+bob+fred
	default:
		case val
		when 2:
			end
		when 4:
			goto Gotya
		esac
	esac

Input/Output
	POKE <address>, <value> -- Change memory
	OUT <port>, <value> -- System output port
	PRINT { { <expr> | <string> } { ';' | ',' | } }* -- Screen output
	LPRINT { { <expr> | <string> } { ';' | ',' | } }* -- Printer output
	INPUT var1 {, var2 {, ... , varn } }
	 
Disk I/O
	READBLOCK <address>, <block number>, <device>
	WRITEBLOCK <address>, <block number>, <device>

File I/O
	OPEN <filename> FOR { INPUT | OUTPUT } AS <fileno>
	PRINT # <fileno>, { { <expr> | <string> } { ; | , | } }*
	INPUT # <fileno>, <var 1> { ,<var 2> {, ... , <var n> } }
	CLOSE <fileno>

VDP
	WRITEVRAM <zram address>,<vram address>,<length>
	READVRAM <zram address>,<vram address>,<length>
	WRITEREG <register>,<value>

Inline Assembly
	[ <inline code>
	<inline code> ]

Example:
	print "Hello."
	[	LD	HL,1024
	LoopHere:	DEC	HL
		LD	A,H
		OR	L
		JR	NZ,LoopHere
	]
	print "There."