I have developed a program in Borland C for MSDOS which handles serial communications over COM1/2/3/4 using only the pins TXD, RXD and GND. (I access the UARTs directly). I have been using Xon/Xofff software handshake but now would like to use RTS/CTS for hardware handshake. My problem is that I don't know what the standard is! What shall I do with RTS/CTS to provide data integrity?
When shall I raise and/or lower RTS?
When shall I check CTS? Do I need to check?
I would appreciate if somebody could come up with some help and maybe some documents about this subject.
Thanks in advance,