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nid help now.. Adder/Subtractor Assembly Program (TASM) w/interface

ei guys.. nid ur help.. i nid an assembly program that adds or subtracts 2 digit (decimal) inputs from the user and outputs its sum or difference (deciaml also) on the screen and on the two 7 segment display interfaced on the LPT1 port (printer port) of the computer... I have a circuit with two sevensegment display attached to two 7447IC(BCD to 7-segment).. is it possible that the output in the parallel port is in bcd? so i will attach the inputs of 7447IC directly to the parallel port? just askin.. pls guys i nid u to help me..pls. pls pls.. much tnx...nid it now.
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