Address types
	AREG	%r register
		+A	address register
		+D	data retister
		+C	CC register
		+S	status register
		+P	PC register
		+U	user stack
		+SP	status register permitted

	AIMM	&value  immediate
	+O	value 1
	+Q	value (1 - 8)
	+M	value (-128 - 127)
	+N	value (-8 - -1)
	+V	value (0 - 15)
	+H	16-bit value

	AEXP	expression

	AIREG	(%r)  register indirect

	AINC	(%r)+  autoincrement

	ADEC	-(%r)  autodecrement

	AOFF	off(%r)  displacement

	ANDX	off(%r,%r)  indexed

	AGEN	all effective addresses

Dispositions of address forms

	DEA	e.a. to low order 6 bits
	DEAM	e.d. to 11-6 as in mov (note coding!)
	DRG	register to low order 3 bits
	DRGL	register to bits 11-9
	DBR	branch displacement
	DCN	dcnt displacement
	DMQ	move-quick 8-bit value
	DAQ	add-quick 3bit value in 11-9
	DIG	ignore
	DIM	Immediate value, according to size
	DIMH	Immediate, always short

Sizes
	0, BSL, etc.

Size dispositions:
	SD	Bits 7-6 as usual
	SMD	bits 13-12 as in mov (note coding!)
	SIG	ignore
