Features
	- 4 16-bit Registers
	- 255 8-bit Flag Registers
	- 255 8-bit Ports
		- 0 console in/out
		- 1 tape in/out
		- 2-32 Reserved
		- Others Implementation Specific
	- Program Counter
	- Call Stack 16 x 16-bit
	- 64K x 8-bit Memory
	- MSB / big-endian

Registers (R)	A-D -> 0-3
Marker (:)		:XYZ

Locations (@)
Code	ASM		Type				Values
0x0		P		Port				0-255 | 0xFF
0x1		R		Register			A-D
0x2		M		Memory				0-65535 | 0xFFFF
0x3		#		Immediate			0-65535 | 0xFFFF | 'a' | "a"
0x4		F		Flag				0-255 | 0xFF
0x5		A		Address In Register	A-D

Instructions

Code	ASM
	Misc
0x00	NOP
	Registers
0x10	LOAD	R	@
0x11	SAVE	R	@
0x12	LOADH	R	@
0x13	LOADL	R	@
0x14	SAVEH	R	@
0x15	SAVEL	R	@
	Accumulator
0x20	CLR		R
0x21	ADD		R	@
0x22	SUB		R	@
0x23	DIV		R	@
0x24	MUL		R	@
0x25	INC		R
0x26	DEC		R
	Logic
0x30	NOT		R
0x31	AND		R	@
0x32	OR		R	@
0x33	XOR		R	@
0x34	SHL		R	0-7		Shift Left
0x35	SHR		R	0-7		Shift Right
0x36	BTS		R	0-7		Bit Set
0x37	BTC		R	0-7		Bit Clear
	Stack
0x40	CALL	#|:
0x41	RET
	Program Flow
0x50	HALT
0x51	JMP		#|:
0x52	JZ		R #|:
0x53	JNZ		R #|:
0x54	JBS		R 0-7 #|:
0x55	JBC		R 0-7 #|:

Program Format
[...ASM...]
MEMORY
0x100 "string abcd"
100 0x00 00 00