GoGo board Cricket Logo Implementation
			BETA Version 0.91
			Last Update: Mar 23, 2004
			This Cricket Logo interpreter has been re-written in PIC-C (from CCS). The VM size including the  original GoGo teathered-mode features is 5.3k. It has been tested with Logo Blocks and Jackal. The following list shows the byte codes that have been ported and their status.
	Stuatus	Code	Description	Note
	Ok	code-end	terminates code.
	Ok	byte	pushes 16-bit number on stack. takes one immediate byte as number in code stream (resulting number is 16-bit representation of 0 - 255).
	Ok	number	pushes 16-bit number on stack. takes two immediate bytes as number in code stream.
	Ok	list	"start of list"; opens a code block
	Ok	eol	"end of list"; closes a code block
	Ok	eolr	"end of list reporter"; closes a code block that will return a value (e.g, for when, waituntil)
	Ok	lthing	"local thing"; uses stack frame to retrieve proc args
	Ok	stop	stops currently running procedure, returning control to caller
	Ok	output	stops currently running procedure, returning value to caller
	Ok	repeat	repeats block for specific number of times
	Ok	if	if input expression is true, executes block
	Ok	ifelse	if input expression is true, executes block1, else executes block2
	Ok	beep	causes Cricket to beep
	Not yet	note	makes Cricket play note of specified pitch and duration
	Ok	waituntil	repeatedly executes block until it evaluates to true
	Ok	loop	indefinitely executes block
	Ok	wait	waits for specified time period
	Ok	timer	returns value of free-running timer
	Ok	resett	resets free-running timer to zero
	Ok	send	sends specified value out IR port, with 0.1 sec trailing delay	GoGo will send a 16 bit value through the serial port.
	Ok	ir	reports value of most recently received IR byte	Replaces IR with serial
	Ok	newir?	reports whether IR value has been received since last call to "ir"	Same as ir.
	Ok	random	reports pseudorandom 16 bit value
	Ok	+	reports sum of two inputs
	Ok	-	reports difference of two imputs
	Ok	*	reports product of two inputs
	Ok	/	reports division of two inputs
	Ok	%	reports remainder of division of two inputs
	Ok	=	reports boolean equality of two inputs
	Ok	>	reports boolean "greater than" of two inputs
	Ok	<	reports boolean "less than" of two inputs
	Ok	and	reports bitwise/logical AND of two inputs
	Ok	or	reports bitwise/logical OR of two inputs
	Ok	xor	reports bitwise XOR of two inputs
	Ok	not	reports bitwise/logical NOT of two inputs
	Ok	setglobal	sets numbered global to value
	Ok	global	reports value of numbered global	Crickets allow 16 global variables. Same for GoGo.
	Ok	aset	sets numbered array with numbered element to value	GoGo uses memory where Crickets store data recordings allowing larger array sizes. They can contain up to 1250 16 bit items.
	Ok	aget	reports value of numbered element of numbered array
	Ok	record	records 16-bit value into data buffer	*Since GoGo has 32K of EEPROM (Cricket has 4K), we have 26K for Data recording.
	Ok	recall	reports 16-bit value stored in data buffer	*the Cricket records and stores 8 bit values (not 16).
	Ok	resetdp	resets data buffer pointer to zero
	Ok	setdp	sets data buffer pointer to specified value (in 16 bit units)
	Ok	erase	erases data point
	X	when	sets up daemon with condition block and action block
	X	whenoff	terminates "when" daemon
	Ok	a,	selects motor A for control
	Ok	b,	selects motor B for control
	Ok	ab,	selects motors A and B
	Ok	on	turns on selected motor(s)
	Ok	onfor	turns on selected motor(s) for specified period of time
	Ok	off	turns off selectec motor(s)
	Ok	thisway	sets selected motor(s) direction to green LED
	Ok	thatway	sets selected motor(s) direction to red LED
	Ok	rd	reverses direction of selected motor(s)
	Ok	sensora	reports value of sensor A
	Ok	sensorb	reports value of sensor B
	Ok	switcha	reports boolean value of sensor A
	Ok	switchb	reports boolean value of sensor B
	Ok	setpower	sets power level of selected motor(s)
	Ok	brake	sets selected motor(s) for active braking
	X	bsend	sends value out Bus Port	Will implement a version for I2C bus instead.
	X	bsr	sends value out Bus Port and reports reply	Same as bsend.
	Ok	c,	selects bus motor C for control
	Ok	d,	selects bus motor D for control
	Ok	cd,	selects bus motors C and D for control
	Ok	abcd,	selects all motors for control
	X	fastsend	sends specified value out IR port without trailing delay
	Ok	stop!	terminates execution completely	Untested
	Ok	eb	"examine byte"; reports value of Cricket memory at specified address	Untested
	Ok	db	"deposit byte"; pokes byte into Cricket memory	Untested
	Ok	low-byte	reports low byte of input
	Ok	high-byte	reports high byte of input
	X = No plan for implementation