1 JZ、JNZ分支程序实例 JZ M0 MOV A,R4 JNZ M1 M0: AJMP G0 M1: ACALL DP JZ OV2 JC OV2 ORL 09H,#80H ORL 0DH,#80H MOV 1DH,R5 MOV 1EH,R6 MOV 1FH,R7 MOV R0,#25 CLR A MOV R6,A MOV R7,A CLR C LOOP1: JNC M2 ACALL ADD0 ADDC A,R1 RET 2 JC、JNC分支程序实例 HSSV: PUSH CMP 25H,#8 JC SND7 SHR 28H,#1 MOV HSOCMD,#10H JNC SND02 SND01: MOV HSOCMD, #30H SND02: ADD HSOTIME,TIME1, #104 INC 25H SJMP SND04 SND03: MOV 28H,@26H CMP 28H, #0AH CLR 25H MOV HSOCMD, #10H ADD HSOTIME,TIME1, #104 INC 26H MOV 28H,@26H SJMP SND6 SND71: OR 24H, #40H SJMP SND03 SND7: OR 24H, #80H SND70: MOV 26H, #DATA2 CLR 25H SND04: POP RET 3 JB、JNB分支程序实例 FPCP: MOV A,R1 XRL A,R5 JNB ACC.7,CP1 CP0: MOV A,R1 CLR C SUBB A,R5 RET CP1: MOV A,R1 JNB ACC.7,CP2 ACALL CP2 JZ CP4 CPL C RET CP2: MOV A,R4 CLR C SUBB A,R0 JNZ CP4 CP3: MOV A,R5 SUBB A,R1 JNZ CP4 MOV A,R6 SUBB A,R2 JNZ CP4 MOV A,R7 SUBB A,R3 CP4: RET 4 CJNE分支程序实例 CJNE A,#40H,NEQ EQ: MOP NEQ: JC LOW NOP LOW: NOP RET 5 DJNZ分支程序实例 SETB P1.1 DL: MOV 30H,#06H DL0: MOV 31H,#0F2H DL1: DJNZ 30H,DL1 DJNZ 30H,DL0 CPL P1.1 AJMP DL