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Interchange block of data between 8060h and 8070h


org 0h
mov r3,#5
mov dptr,#8000h
mov r0,#60h
mov r1,#70h
up:mov dpl,r0
movx a,@dptr
mov b,a
mov dpl,r1
movx a,@dptr
mov r2,a
mov a,b
movx @dptr,a
mov dpl,r0
mov a,r2
movx @dptr,a
inc r0
inc r1
djnz r3,up
sjmp $
end

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