UP_KEY          PROC            NEAR

CMP BX, 160
JE  RET_FRM_UP

MOV [BX + SI], 0F20H
SUB BX, 160
MOV [BX + SI], 0F30H

RET_FRM_UP:

RET


UP_KEY      ENDP

RIGHT_KEY       PROC            NEAR

CMP SI, 156
JE  RET_FRM_RIGHT

MOV [BX + SI], 0F20H
ADD SI, 2
MOV [BX + SI], 0F30H

RET_FRM_RIGHT:

RET

RIGHT_KEY       ENDP