单片机实现电子表分秒程序 报错 error A39: REGISTER OPERAND EXPECTED

我的程序是这样的
disbuf0 equ 30h
disbuf1 equ 31h
disbuf2 equ 32h
disbuf3 equ 33h
second equ 40h
mind equ 41h
org 0000h
ajmp main
org 000bh
ajmp intert0
main:
mov sp,#70h
mov r2,#0
mov r5,#0
call initt0
loop:
call disp
call delay
ajmp loop
initt0:
mov a,tmod
anl a,#0f0h
orl a,#01h
mov tmod,a
mov tl0,#low(-20000)
mov th0,#high(-20000)
setb et0
setb ea
setb tr0
ret
disp:
mov dptr,#distab
mov a,#disbuf0
add a,r5
mov r0,a
mov a,@r0
movc a,@a+dptr
mov p2,-1
mov p0,a
mov dptr,#seattab
mov a,r5
movc a,@a+dptr
mov p2,a
inc r5
cjne r5,#4,dispend
mov r5,#0
dispend:
ret
intert0:
push acc
push psw
inc r2
cjne r2,#50,next
mov r2,#0
inc second
mov a,second
call hex2bcd
mov disbuf1,a
mov disbuf0,b
cjne second,#60,next
mov second,#0
mov disbuf0,#0
mov disbuf1,#0
inc mind
mov a,mind
call hex2bcd
mov disbuf2,b
mov disbuf3,a
cjne mind,#60,next
mov mind,#0
mov disbuf2,#0
mov disbuf3,#0
next:
mov tl0,#low(-20000)
mov th0,#high(-20000)
pop psw
pop acc
reti
hex2bcd:
mov b,#10
div ab
ret
delay:
mov r7,#10
ll1: mov r6,#-1
djnz r6,$
djnz r7,ll1
ret

distab: db 3fh,06h,5bh,4fh,66h,6dh,7dh,07h,7fh,6fh
seattab: db 0feh,0fdh,0fbh,0f7h
end

相关了解……