Hi,
If you want to make a direct connection between two PC's you can use the RS232(Com,serial) port.It is an easy one.By using three pins of the COM ports of the both two computers and using hyper terminal you can make file transfer and any other data transfers.
The connections are as below.
First the 7th pins of the both computers must be connected.(7th pin is the ground.)
Second the 2nd pin of the 1st computer must be conneted to the 3rd pin of the 2nd computer.
Third the 3rd pin of the 1st computer must be conneted to the 2nd pin of the 2nd computer.
(2nd pin of the com port is TxD=Transfer data.)
(3rd pin of the com port is RxD=Receive data.)
The logic is simple.The transfer data pin of the first computer tranfers the data and the TxD pin of the first computer is conneted to the RxD of the second computer.So the second computer can receive it.The logic is same as the communication between the second and the first computer.
For further information about the com port you can look to the beyondlogic web site or you can look to the Mazidi's 80x86 microprocessor book or Gaunkar's 80x85 microprocessor book.
If any other questions you can ask me .
My e-mail is:
msemse@gmail.com
msemse