1 .equ p6ddr, 0xffb9 ;0x7f for output 2 .equ p6dr, 0xffbb 3 .equ seed, 0x01 4 .text 5 .org 0 6 reset: .word main ;reset vector 7 ; 8 .org 0x400 9 main: mov.b #0x7f,r0l ;port 6 ddr = 7F 10 mov.b @0xffbb:8,r0l ;***test*** 11 mov.b r0l,@p6ddr:16 12 ; 13 mov.b #seed,r0l ;start with 0000001 14 loop: mov.b r0l,@p6dr:16 ;output to port 6 15 delay: mov.w #0x0000,r1 16 deloop: adds #1,r1 17 bne deloop:8 ;not = 0 18 rotl r0l 19 bra loop:8 20 .word 0 21
