calculator\BCD.VHD ..........\BCD3.VHD ..........\BCDADD.VHD ..........\BCD_7SEG.VHD ..........\BCD_ADD_SUB.VHD ..........\BCD_MUX.VHD ..........\COM9S.VHD ..........\COM_ENCODE.VHD ..........\FADD.VHD ..........\FADD4.VHD ..........\KEYBOARD.VHD ..........\KEY_SCAN.VHD ..........\MULTIPLIER.VHD ..........\NEGATIVE.VHD ..........\REGNE.VHD calculator