Find the microcomputer principle course design system dwell time program

;When debugging, you need to change the Chinese punctuation marks to English punctuation marks, otherwise the out of memory prompt message will appear.

data segment;Define data segments.

adr db 10,-31,-45,67,80,46,0,-31,0,77

num equ $-adr;num is the number of data DA1 DB 0; da1 is used to store the number of positive numbers, and the initial value is 0da2 db 0; da2 is used to store the number of negative numbers, and the initial value is 0da3 db 0; da3 is used to store the number of 0s, and the initial value is 0data ends

code segment;Define the paragraph.

assume ds:data,cs:codestart: mov ax,data;The data segment address is loaded into MOV DS, AX

lea si,adr

mov cx,num

mov al,0;AL clears.

don1:mov al,[si]

cmp al,0

jge don2

inc da2

jmp end0

don2:cmp al,0

jz don3

inc da1

jmp end0

don3:inc da3

end0:inc si

dec cx

jnz don1

mov ah,4ch

int 21h

code ends

end start

03hx4 =0ch, the interrupt service entry address of int 3 is stored in 0ch 0fh of the interrupt vector table, 4 units.

Second, the purpose of the experiment.

1. Understand the basic working principle of traffic light management.

2. Familiar with the working principle and application programming rights of the 8259A interrupt controller 3. Familiar with the various working methods and applications of the 8255A parallel interface 4. Learn the method of extending the simple IO interface in single-board mode to use two-color lights.

5. Further learn the programming technology of microprocessor.

What age, still playing 8086, it's really outdated! Consider using ARM or DSP to do this. At least 51.

This needs to be written in C, in fact, the principle is through the counter chip. Connection ports, specific examples are available online.