Notation and nomenclature

Symbol	Meaning
J/K	8-bit register: a, b, c, d, e, h, l or a.
SS	16-bit register: bc, de, hl or sp.
WW	16-bit register: bc, de, ix, iy or sp.
XY	16-bit index register: ix or iy.
U	Arithmetic/logical operation: add, adc, sub, sbc, and, xor or or cp.
V	Increment/decrement operation: inc or dec.
G	Rotation/shift operation: rlc, rrc, rl, rr, sla, sra, sll or srl.
M	Bit set/reset operation: res or set.
Z	Condition: nz, z, nc, c, po, pe, p or m.
N	Immediate 3-bit unsigned integer (embedded in the opcode).
BYTE	Immediate 8-bit unsigned integer.
OFFSET	Immediate 8-bit signed integer (added to the index register).
WORD	Immediate 16-bit unsigned integer.
i subfix	Initial/input value of the register or memory address.
o subfix	Final/output value of the register or memory address.