Hi, again, Zafarul:

This site will give you complete and correct info on building a midi cable. Note that, if you don't already have a midi interface for your computer, it also gives you a link to that. The midi interface is different from the midi cable.

http://colomar.com/Shavano/midi_cable.html

Although I have built a midi interface for the old-style gameport, it's not an easy project, although it only involves 1 integrated circuit and a few other pieces. You can buy a simple one for about $15 here in Canada. Or a USB port which can go anywhere from $35 to $120, depending on what you want. Again that's in Canada. I'd have no idea of prices or availability in India.

Good luck

David