WebJun 20, 2024 · A more exact way of putting it would be to say that IN AL, 80h makes the CPU read a word from port 80h and puts the result in AL. Unlike memory accesses, IO port reads can have side effects, so it's important to be precise. \$\endgroup\$ – … WebThe following instructions will set the Overflow flag: mov al,80h sub al,-5 true If AL contains +127 and you add 3 to AL, the Overflow flag will be set true The EIP register can be the …
微机原理实验报告.docx - 冰豆网
WebIN AL , PORTC OR AL ,80h out PORTA , AL 6. (3 point) Develop an interface to correctly drive a relay (can select any relay) . The relay is 12V and required a coil current of 150mA . 7. (3 point) Develop a time delay procedure for 2GHZ Pentium 4 processor that waits for 80 us. WebIN AL, 80H ; AL gets data from I/O port address 80H. IN AX, 80H ; AX gets 16-bit data from I/O port address 80H OUT 80H, AL ; I/O port 80H gets 8-bit data from AL OUT 80H, AX ; I/O port 80H gets 16-bit data from AX This is also called Fixed Port Addressing. Indirect Addressing Mode: If we use 16-bit I/O address we get a range of 0000H--FFFFH. how to split text into different cells
AIBUS及MODBUS通讯协议说明V80_文档下载
WebSep 20, 2024 · mov bl, al or al, 80h out 61h, al mov al, bl out 61h, al mov al, 20h out 20h, al pop bx ax iret db 4 dup(90h) OFFS = $ - 100h ; db 128 dup(0) ;Buffer. Won't be needed for a keyboard handler. end Start -- snip -- -- X-Bios . Sat, 23 Sep 2000 03:00:00 GMT : Jim_KEw #4 / 5. Keyboard handler using port 60h. I've gotten great number of responses to ... Web微机原理实验报告微机原理与接口技术实验指导书班级 学号 099074 姓名 安徽工业大学计算机学院实验一 存贮器读写实验一实验内容 对指定地址区间的ram4000h4ffh先进行写数据55aah,然后将其内容读出再写到5000h5ffh中 WebAND AL, 1111_0000b. To use instructions OUT DX, AL to send data information to an output port, which register must be used to hold data information? AL register is used to hold the 8-bit data. After the ROR instruction is executed in the code sequence below, what is the final value for AL? MOV AL, 1000 1111b ROR AL, 2 The answer is 1110_0011b reach a given score leetcode