将片内ROM中两段四字节长度的内容分别移至片内RAM中以30H和40H为首地址的存储区中
ORG 0000H
JMP START
ORG 0040H
START:
MOV SP,#60H
MOV DPTR,#TABLE1
MOV R0,#30H
MOV R2,#4
CALL ROM2RAM
MOV DPTR,#TABLE2
MOV R0,#40H
MOV R2,#
CALL ROM2RAM

JMP $
ROM2RAM:
CLR A
MOVC A,@A+DPTR
MOV @R0,A
INC R0
INC DPTR
DJNZ R2,ROM2RAM
RET
TABLE1: DB 12H,34H,56H,78H
TABLE2: DB 0ABH,0CDH,0EFH,0AAH
END
执行结果:30H:12 34 56 78
40H:AB CD EF AA
1,比较片内RAM60H相邻两单元中无符号数的大小,使它们按小数在前,大数在后的原则存放.如两数相等,则建立起标志位F0.
ORG 0000H
SJMP START
ORG 0050H
START: MOV SP,#60H
CLR C
CLR F0
MOV R0,#60H
MOV A,@R0
CJNE A,61H,LP
SETB F0
JMP RET1

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