CS8253 EQU 0303 h

COUNT0 EQU 0300 h

COUNT1 EQU 0301 h

COUNT2 EQU 0302 h



CODE SEGMENT

ASSUME CS: CODE



START the PROC NEAR

MOV DX, CS8253

MOV AL, 01110110 b

The OUT DX, AL



MOV DX, COUNT1

MOV AX, 307

The OUT DX, AL

MOV AL, AH

The OUT DX, AL



MOV DX, CS8253

MOV AL, 10110110 b

The OUT DX, AL



MOV DX, COUNT2

MOV AX, 1000

The OUT DX, AL

MOV AL, AH

The OUT DX, AL



JMP $

START ENDP



CODE ENDS

The END START

Why there are 307 in this program?

Can I switch to the other?

Can according to the data inside the frequency of IMS experiment board?

How to use the software and hardware change experimental phenomena respectively?

thank you