已经调试通过的代码DATA SEGMENTTIMER DB 4 DUP(0)DATA ENDSSTACK SEGMENT
DB 100 DUP(0)STACK ENDSCODE SEGMENT
ASSUME CS:CODE,DS:DATA,SS:STACKSTART:MOV AX,0MOV DS,AXMOV SI,18HSHL SI,1SHL SI,1MOV DX,OFFSET CLOCKMOV [SI+2],DXMOV DX,0FF00HMOV AL,00010011B OUT DX,ALMOV DX,0FF01HMOV AL,00011000B...
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