#关于单片机的问题#

已知程序执行前有(A)=20H (SP)=52H,(51H)=FFH, (52H)=FFH,下述程序执行后，(A)=( ) (SP)=( )
(51H)=( ) (52H)=( ) (PC)=( )
POP DPH
POP DPL
MOv DPTR,#4000H
RL A
MOV B,A
MOVC A,@A+DPTR
PUSH Acc
MOV A,B
INC A
MOVC A,@A+DPTR
PUSH Acc
RET
ORG 4000H
DB 10H,80H,30H,50H,30H,50H