Mov ah 25h int 21h
Nettet18. mai 2024 · MOV AH, 25H INT 21H 这段代码调用了中断号为21h的中断处理程序的25H号功能,将INTROUT9的段地址和偏移地址放入了中断向量表。 INT 9H 这段代码 … mov ah, 0Ah mov dx, OFFSET buffer int 21h My assignment tells me that ctrl-c should "abort the program with an appropriate error message". I was told that int 23h is called whenever ctrl-c is called or detected. Apparently I can register my own interrupt handler via int 21h / ah=25h.
Mov ah 25h int 21h
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Nettet2. nov. 2004 · mov ds,ax mov al,N mov ah,25h int 21h pop ds in al,21h and al,0feh out 21h,al sti ... Nettet14. apr. 2024 · Masm for windows 集成实验环境 是针对 汇编 语言初学者的特点开发的一个简单易用的 汇编 语言学习与 实验 软件,支持32位与4位的 WINDOWS 7,支持DOS …
Nettet格式: MOV AH, 4CH INT 21H 功能:终止当前程序的运行,并把控制权交给调用的程序,即返回DOS系统,屏幕出现DOS提示符,如“C: \ >”,等待DOS命令。 8.直接输入、输出单字符(6号功能调用) 格式: MOV DL, 输入/输出标志 MOV AH, 06H INT 21H 功能:执行键盘输入操作或屏幕显示输出操作,但不检查Ctrl+Break组合键是否按下。 执 … Nettet14. mar. 2024 · .code mov ax, @data mov ds, ax ; input the first character mov ah, 09h lea dx, msg1 int 21h mov ah, 01h int 21h mov char1, al ; input the second character …
Nettet21. des. 2011 · 关注 INT 21 - DOS 1+ - SET INTERRUPT VECTOR AH = 25h AL = interrupt number DS:DX -> new interrupt handler 设置中断AL为DS:DX指向的新中断 … NettetBoth the services (07h and 08h) of INT 21h have the same purpose (console input without echo) as mentioned in DOS INT 21h.But it also mentions a small difference which is …
Nettet19. apr. 2024 · INT 21h / AH=25h – set interrupt vector; INT 21h / AH=2Ah – get system date; INT 21h / AH=2CH – get system time; INT 21h / AH=35h – get interrupt vector; …
Nettetmov ax,351Ch ; get INT 1C vector int 21h mov word ptr intSave,bx mov word ptr intSave+2,es ; save INT 1C vector install_handler: push ds ; save DS mov ax,@code ; … francis schaeffer the mark of a christianNettet27: mov AX,3501H ; AH := 35H and AL := 01H 28: int 21H ; returns the offset in BX 29: mov old_offset,BX ; and the segment in ES 30: mov old_seg,ES 31: 32: ;set up … francis schafer obituary calgaryNettetMOV AH, 25H;设置中断向量功能调用,还原原中断向量 INT 21H ┇ 8.12如设备D1,D2,D3,D4,D5是按优先级次序排列的,设备D1的优先级最高。 而中断请求的次序如下所示,试给出各设备的中断处理程序的运行次序。 假设所有的中断处理程序开始后就有STI指令。 MOV CX, CHAR_NO ROTATE: MOV DL, [BX] MOV AH, 05H INT 21H INC … blank systems computer networking giantNettet16. nov. 2024 · All the mov ah, 1 lines in your example have no effect as you're overwriting the register with other values afterwards, before doing an int 21h call. Also, it's not … francis schafer obituaryNettet30. apr. 2016 · INT 21h, AH=09h - address: 170B5 byte 24h not found after 2000 bytes. ; correct example of INT 21h/9h: mov dx, offset msg mov ah, 9 int 21h ret msg db … francis scheurich west valley utNettet8. mai 2013 · INT 1CH其实是调用INT 21H中的25号功能:置中断向量AL=中断号,DS:DX=入口,同时INT21H中的35号功能:取中断向量,AL=中断号,ES:BX=中断程序入口. 2.该程序中的INT1CH 该程序中是调用子程序设置背景颜色,子程序中使用STI打开中断,CLI关中断,IRET中断返回. INT 1CH系统中断是每秒发生18.2次,即调用每秒它18次,所 … francis schaeffer two story universeNettetMOV AH,25H INT 21H;把DS:DX存入N号中断向量地址处 POP DS … POP DX POP DS MOV AL,N MOV AH,25H INT 21H;把原来N的向量再弹出来写回向量地址处。 INTRAD PROC … IRET INTRAD ENDP 设置中断向量的方法一:用Mov指令 MOV AX,0 MOV ES,AX MOV BX,N*4 MOV AX,OFFSET INTRAD MOV ES:WORD PTR [BX],AX MOV … francis schaeffer trilogia