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MICROPROCESSOR INSTRUCTION REFERENCE->CPD

CPD Compare accumulator and memory location addressed by HL and then decrement HL and BC

A - (HL) : HL <- HL - 1 : BC <- BC - 1

Flags


S Set if A < (HL) else cleared

Z Set if A = (HL) else cleared

H Set if half carry, else cleared

P/V Cleared if BC becomes 0, else set

N Set always

C Not affected



No of M T usec @

bytes cycles states 2 MHz


2 4 16 8

S	Set if A < (HL) else cleared
Z	Set if A = (HL) else cleared
H	Set if half carry, else cleared
P/V	Cleared if BC becomes 0, else set
N	Set always
C	Not affected