bugs

	cursor right gets you out of one line editor at the end.  this
	can get annoying and so perhaps you should have to hit it twice,
	or perhaps you should plain have to hit escape to get out of this

	continue does debug window setup even if you can't continue

	whole immediate block is typechecked before executing statement.
		(unsure how how to duplicate)

	a goto inside a superstep goofs. 

	no detection of number bigger than 32767 on entry.

	reset(output) doesn't redirect output

	if you accidentily type round brackets instead of square brackets
	in an array subscript, >> crash.

	type delta(expr) when delta is a variable and get an IOT trap