I wrote you a few lines: program: org 0000 HLJ MP start org 000 BH LJMPT _ 0 org 0030 h start: MOV30H, # 0fffhmov R3, # 04hsetb easetb et0mov tmod, # 0 1hmov th0, # 3chmov tl0，# 0 hsetb tr 0 main:MOV 3 1H，# 0 1 hlcall delay mov 365433