codeBits = 4

INC = 0
RLA = 1
ADD = 2
SUB = 3
AND = 4
OR =  5
XOR = 6
NOT = 7

LDI = 8
LDM = 9
STM = 10
JPI = 11
JPZ = 12
JPC = 13
JPN = 14
NOP = 15
