Mov ah 4ch int 21h

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August undefined, 2024

Nettet25. des. 2008 · 汇编语言MOVAH，4CHINT21H返回DOS中INT21H称为DOS中断调用。实际上，是调用DOS中的子程序。当MOVAH，4CH，就是结束本程序，返回DOS操作 … Nettet9. nov. 2024 · 一、用4CH系统功能调用实现返回 4CH系统调用功能是结束程序执行返回DOS，因此可以利用它来完成程序返回操作系统，其具体方法是在程序结束时使用下列命令： MOV AH, 4CH INT 21H 但并不是任何程序都可以用这种方法来实现返回DOS的，只有返回DOS的主程序才能使用这种方式，而对于调用的子程序应该返回给的是调用程序 …

What does "int 21h" mean in Assembly? - Stack Overflow

Nettet13. mar. 2024 · int 21h 执行DOS中断，调用DOS的打印字符串功能，从DX寄存器指向的地址开始输出字符串。同样的过程用于输出字母Y。 mov ah, 4ch 将4Ch存入AH寄存器中，这是DOS中的程序退出功能的调用号。 int 21h 执行DOS中断，调用DOS的程序退出功能，结束程序运行。 main endp 结束程序的主过程。 end main 表示程序的结束。这个 … Nettetmov dh,0 again: mov al,[si] mov ah,9 int 21h ret disp endp exit: mov ah,4ch int 21h code ends end start 4.6题 code segment assume cs:code start: mov ah,2ch int 21h mov … butler services llc

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Nettet19. apr. 2024 · INT 21h / AH=4CH – return control to the operating system (stop program). INT 21h / AH= 56h – rename file / MOVe file. Mouse driver interrupts — INT 33h INT 33h / AX=0000 – mouse initialization. any previous mouse pointer is hidden. INT 33h / AX=0001 – show mouse pointer. INT 33h / AX=0002 – hide visible mouse pointer. Nettet6. jul. 2024 · mov ah,4ch int 21h princi endp b10clr: mov ax,0600h mov bh,07 mov cx,0000 mov dx,184fh int 10h ret c10set: mov ah,02h mov bh,00 int 10h ret d10disp: mov cx,256 lea dx,char d20: mov ah,09h int 21h inc char loop d20 ret end begin Calculadora Código: .model small .stack 100 .data m1 db 'Ingrese Numero 1: ','$' m2 … http://site.iugaza.edu.ps/tfourah/files/2010/02/Assembly.pdf butler service training manual

Mov ah 4ch int 21h

INT 21h DOS interrupt 8086 Microprocessor - Care4you

Nettet12. apr. 2024 · int 21h mov ah, 4ch int 21h main endp end main Questo codice somma due numeri a 16 bit e stampa il risultato sulla console. Il primo numero è memorizzato nella variabile num1 e il secondo numero è memorizzato nella variabile num2. Il risultato della somma viene memorizzato nella variabile result. Esempio 2: Calcolo del fattoriale 1 2 3 … Nettet24. feb. 2024 · The MOV file format is a so-called container file format, which can bundle multiple elements like video, audio, and subtitles, as well as metadata, such as …

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Nettet19. apr. 2024 · INT 21h / AH=4CH – return control to the operating system (stop program). INT 21h / AH= 56h – rename file / MOVe file. Mouse driver interrupts — INT 33h INT … NettetMOV AH, 4CH. INT 21H ;返回DOS;-----DISP_AX: MOV BX, 16 ;16进制，要除16. MOV CX, 4 ;求4位16进制数. ABC: CWD ;将AX扩展到DX. DIV BX. PUSH DX ;保存余数到堆 …

Nettet22. des. 2024 · MOV DX, OFFSET BUFFER MOV AH, INT 21H 读入字符串LEA DX, MOV BX, DX MOV AL, 读入字符串的字符个数MOV AH, ADDBX, AX MOV AL, MOV [BX+1], AL MOV AH, INC DX 确定显示字符串的首地址INT 21H MOV AH, INT 21H 【解答】0AH; BUFFER+1; [BX]; 4.5-2阅读下列程序段，说明程序段的功能 AGAIN: MOV AH, 01H INT … Nettet27. okt. 2010 · ASSUME CS:CODE CODE SEGMENT START: MOV AL ,2 OUT 70H, AL ;要在2号端口读出一个字节,这里的2号端口其实就是当前系统时间的分钟 IN AL ,71H ;从CMOS中读出一个字节到 AL 中 MOV AH, AL MOV CL,4 SHR AH,CL AND AL ,00001111B ADD AH, 30H ADD AL, 30H MOV BX,0B800H MOV ES,BX MOV B 汇编两数相加

NettetMOV AH, 4CH INT 21H Load the return code ( O for normal exit, non zero error) into AL, then call the interrupt with code 4CH in AH. This is the proper DOS exit. However, if we are running our program with DX this will exit DEBUG. ADD COMMENT EDIT Please log in to add an answer. Nettet1. apr. 2024 · DATA ENDS CODE SEGMENT 'CODE' ASSUME CS:CODE,DS:DATA START:MOV AX,DATA MOV AL,A MOV BL,B MUL BL MOV BL,C MOV BH,0 SUB AX,BX MOV S,AX MOV AH,4CH INT 21H CODE ENDS END START 我们在编写一个S = 86H * 34H - 21H的程序，式中的三个均为无符号数。涉及到三个数的运算，并且题中没有给定 …

Nettet2. jun. 2011 · It accepts input till 0 is hit -- there's a mov ah,01h and an int 21h, then it compares al to '0' and if al is '0', it jumps to last, otherwise it jumps into back .) …

Nettetmov ah,4ch int 21h，简单的说，mov ah就是结束程序，4ch int 21h返回操作系统。在INT 21H功能调用中，只需要将AH设置成功能编号，其他寄存器设置该功能号所规定的参数，执行INT 21H指令即可完成所需的功能。 INT是interupt中断的缩写，INT 21H是指DOS汇编语言的中断调用命令，最常用的包括：01H、07H和08H —从标准输入设备输入字符 … cdc youth risk survey 2019Nettet23. apr. 2024 · int 21h means, call the interrupt handler 0x21 which is the DOS Function dispatcher. the "mov ah,01h" is setting AH with 0x01, which is the Keyboard Input with … butler service sandals st luciaNettet11. sep. 2024 · 输入：12345输出：54321CODESEGMENTASSUMECS:CODESTART:MOVCX,5LP1：MOVAH,01INT21HPUSHAXLOOPLP1MOVDL,0AHMOVAH,02INT21HMOVDL,0DHMOVAH,02INT21HWord文档MOVCX,5LP2：POPDXMOVAH,02INT21HLOOPLP2MOVAH,4CHINT21HCODEENDSENDSTART2. … cdc youth sports guidelines