a.asm

40个练习程序（坚持）.rar

org 000h
ajmp main
org 0030h
main:
mov r0,#00h
mov r1,#00h
mov tmod,#01h
mov th0,#(65536-500)/256
mov tl0,#(65536-500) mod 256
setb tr0
setb 00h
setb p1.0
aa:jbc tf0,next
ajmp aa
next:mov th0,#(65536-500)/256
mov tl0,#(65536-500) mod 256
inc r0
cjne r0,#200,n1
inc r1
cjne r1,#200,n1
cpl 00h
mov r0,#00h
mov r1,#00h
n1:jb 00h,n2
setb p1.0
setb tr0

ajmp aa
n2:cpl p1.0
setb tr0

ajmp aa
end