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MOV [S1],[DI] RCR DX, CL IN AL, DX RET 4
MUL BX 4 MUL [BX] MOV AL,02H MOV AL,[BX]
MUL BX MUL[B MOV AL,02H MOV AL,[BX]
MUL BX MUL [BX] MOV AL,02H MOV AL,[BX]
IN AL,20H OUT 20H,AL MOV 20H,AL ADD AL,20H
MUL BX 4 MUL [BX] MOV AL,02H MOV AL,[BX]
IN AX,0378H MOV BL,AL MOVSB SHL AX,1
IN AX,03F8H MOV BL,AL MOVSB SHL AX