NEC PD754144 - Manual (Page 38)

CHAPTER 3 FEATURES OF ARCHITECTURE AND MEMORY MAP
38 User’s Manual U10676EJ3V0UM
Examples 1. To compare data 50H to 57H with data 60H to 67H
DATA1 EQU 57H
DATA2 EQU 67H
SET1 MBE
SEL MB0
MOV D, #DATA1 SHR 4
MOV HL, #DATA2 AND 0FFH
LOOP : MOV A, @DL
SKE A, @HL ; A = (HL)?
BR NO ; NO
DECS L ; YES, L
← L – 1
BR LOOP
2. To clear data memory of 004H to 07FH
CLR1 RBE
CLR1 MBE
MOV XA, #00H
MOV HL, #04H
LOOP : MOV @HL, A ; (HL) ← A
INCS L ; L ← L+1
BR LOOP
INCS H ; H
← H+1
NOP
SKE H, #08H
BR LOOP