51单片机的汇编作业答:1:ORG 0000H LJMP MAIN ORG 0030H MAIN:MOV DPTR,#1000H MOV R0,#30H LP:MOVX A,@DPTR MOV @R0,A CLR A MOVX @DPTR,A INC DPTR INC R0 CJNE R0,#60H,LP SJMP END 2:ORG 0000H LJMP MAIN ORG 0030H MAIN:MOV DPTR,#2000H MOV R2,#0 ;正 MOV R3,#0 ;负 MOV R4,...