WebAug 13, 2024 · (80h/0x80 or 128 in decimal is the Unix System Call interrupt) When running in Real Mode (16-bit on a 32-bit chip), interrupts are handled by the BIOS. When running on … Webout dx,al dec dx nosc: in al, dx; 检测转换结束信号 test al,80h jnz nosc; eoc=1, 则等待,检测eoc下降沿 noeoc: in al, dx; test al,80h jz nosc; eoc=0, 则等待,检测eoc上升沿,转换结束 mov dx,02c0h; 读转换结果 in al,dx stos databuf; 保存结果 inc bl; 修改模拟通道地址 loop nexta;cx-1; ret adc0809 endp ...
电池容量(Ah)的含义是什么? - 知乎 - 知乎专栏
WebApr 12, 2024 · in,从端口输入; out,输出到端口; in al,21h 从21h端口读取一字节数据到al in ax,21h 从端口地址21h读取1字节数据到al,从端口地址22h读取1字节到ah out 21h,al 将al的值写入21h端口 out 21h,ax 将ax的值写入端口地址21h开始的连续两个字节。 Webin ax,80h;将80H端口的数据输入到AX寄存器中。 out 80h,AL;字节输出指令,将AL寄存器的内容输入到80H端口; 5.2 indirect i/o port addressing. 如果端口大于256个,则可以寻 … cin news paper wedding an
8086汇编指令详解_汇编双字怎么存放_in_han的博客-CSDN博客
WebAug 14, 2024 · 9. INT is the assembly mnemonic for "interrupt". The code after it specifies the interrupt code. (80h/0x80 or 128 in decimal is the Unix System Call interrupt) When running in Real Mode (16-bit on a 32-bit chip), interrupts are handled by the BIOS. When running on top of an Operating System, interrupts are handled by the OS through an … Webpoll: in al, status ;①. test al, 80h ;②. je poll ;③. in al, data ;④. 查询式输出: 通过查询,实现了快速的cpu与慢速外设之间同步交换信息,效率低。只适用于cpu负担不重,要求服务的外设对象不多且任务相对简单的场合。 WebDec 12, 2008 · 1)BEGIN: IN AL,5FH ;把端口5FH(接口部分的寄存器)的内容读到CUP中的AL寄存器. TEST AL,80 ;检测AL是否为80,这里应该是80H吧,判断符号位嘛. JZ NEGATIVE ;是就跳到NEGATIVE. MOV AH,0 ;AH清零. JMP STOP ;停止. NEGaTIVE:MOV Ah,0FFH ;-1的补码给AH. STOP: HLT ;CPU停止工作. 功能:检测 ... c in new gcse