第 4 章汇编语言程序设计

4 4.1 4.2

4.1 4.1.1 4.1.2 4.1.3

4.1.1 10123

4.1.2 1 MCS-5112

2 STARTMOVA30HA30H

4.1.3 1ORG ORG1000H STARTMOVA#20H MOVB#30H 2EQU

3DB 4DW 5DS 6BIT 7END

4.2 4.2.1 4.2.2 4.2.3 4.2.4 4.2.5 4.2.6

4.2.1 123456

4.2.2 4.1 30HBCDASCIIRAM4.1ORG0100H MOVA30H ANLA#0FH4

ADDA#30HASCIIMOV32HAMOVA30HSWAPA44ANLA#0FH44ADDA#30HASCIIMOV31HA SJMP$ END

4.2 XY1030H31H32H 101004-2ORG0100HMOVA30H30HMOVBAXB

MUL ABX2MOV R1AR1MOV A31H31HMOV BAYBMUL ABY2ADD AR1X2+ Y2MOV 32HASJMP $END

4-2 4.2

4.2.3 14-31 23

24.3 X30H X+2X>0Y =100 X=0 XX

MOVA30HJBACC.7NEGNEG JZZER0 ZER0 ADDA#02HX+2 AJMP SAVESAVEZER0MOV A# 64HY=100 AJMP SAVESAVE NEGDEC ACPLAXSAVEMOV 31HA SJMP

34.4 R07R0

ORG 0100HMOV DPTR#TAB MOV AR0 CLR C RLC AA2*A JMP @A+DPTRPC A+DPTRTAB:AJMPSUB0 AJMP SUB1 AJMPSUB2 AJMP SUB5 AJMPSUB6

4.2.4 14-61 23 44-7

24.5RAM30H10 X+2 X>0Y= 100 X=0 X X

ORG0100H MOVR0#10 MOVR1#30HSTARTMOV A@R1 JBACC.7NEG NEG JZZER0 ZER0 ADDA#02H X+2 AJMP SAVE SAVEZER0MOV A# 64H Y=100

AJMP SAVESAVENEG DECA CPLAXSAVEMOV @R1A INCR1 DJNZR0START SJMP

4-8 4.5

4.2.5 1 4-101 2344-11

24.8 4.44.5ORG0100H MOVR0#10 MOVR1#30H

STARTMOV A@R1 ACALL DISPOSESAVEMOV @R1A INCR1 DJNZR0START SJMPORG0200HDISPOSEJB ACC.7NEG NEG

JZZER0ZER0 ADDA#02HX+2 AJMPBACKSAVEZER0MOV A#64HY=100 AJMPBACKSAVENEGDECA CPLAXBACKRET

4.2.6 4.9 4-12P3.1P1.1P1.0RS0RS1PSW30H31HP1.0ORG0000HMOVCP3.1

ANLCP1.1 CPLC MOV20HCMOVC30H ORLC/31HANLCRS1ANLC20HANLCRS0MOVP1.0CSJMP$

第 4 章 汇编语言程序设计