Nettet19. feb. 2024 · MOV AL,20H ;OCw2 OUT 20H,AL POP DX POP CX POP BX POP AX ;保护以恢复现场 IRET MOV AH,4CH INT 21H CODE ENDS END START 实验结果: 实验结果 由实验结果可得,IR6的优先级是比IR7的高的,这段代码就是比上一个多了IR6的中断服务程序。 实验三 :实现KK1,KK2的加减功能,摁下KK1,实现加一;摁下KK2实现减 … Nettetmov al,[bx] inc bx l2: cmp al,[bx] jbe l3 xchg al,[bx] l3: inc bx loopl2 pop bx mov [bx],al inc bx pop cx loopl1 hlt code ends out 08h,al outoeh,al 6.2题 分析可知,82530号计数器控制字为34h,计数初值为2710h。 mov dx,203h mov al,34h outdx,al mov dx,200h mov al,10h outdx,al mov al,27h outdx,al 6.3题
《微型计算机原理及应用》习题答案和实验 - 百度文库
http://no.wondershare.com/video-editing-tips/split-mov-file.html Nettet1. okt. 2024 · * pop ds in al,21h ;读8259中断屏蔽字 and al,7fh ;开8259中断7 out 21h,al mov cx,000ah a1: cmp cx,0000h jnz a2 in al,21h or al,80h out 21h,al sti hlt a2: sti jmp a1 ;断点 irq7: mov ax,0137h ;中断程序入口地址 int 10h ;bios功能调用, mov ax,0120h ;显示“7”和空格 int 10h dec cx mov al,20h out 20h,al cli iret code ends end start ..。.. holiday drawing for kids
K清风微机原理习题1_百度题库 - 百度教育
Nettet11. apr. 2024 · 1、中断控制器的框架图 2、中断控制器的端口 当A0是0时芯片的端口是0x20和0xA0(从芯片),当A0是1时端口是0x21和0xA1, 3、ICW1 ICW1在linux0.11用 … Nettet主程序如下: mov ax, seg intr ;形成中断矢量表 mov ds, ax mov dx, offset intr mov al, n mov ah, 25h int 21h mov al, 10000000b ;8255 初始化 out 83h, al mov al, 00110101b ;通道 0 方式 2 ,bcd 计数 out 87h, al mov al, 00h ;置初值 2000 out 84h, al mov al, 20h out 84h, al mov al, 01110111b ;通道 1 方式 3 ,bcd 计数 out 87h, al mov al, … Nettet5. okt. 2024 · mov al, 20h out A0h, al out 20h, al and the PIC sends the interrupt assigned to IRQ 3, which the CPU handles (using the IDT to look up the handler for that interrupt). Alert readers will notice that the CPU has reserved interrupts 0-31, yet IRQs 0-7 are set to interrupts 08-0Fh. holiday downtown raleigh