## Input/Output Device Driver Reference

[prev][next][parent][TOC]

### RTS Control Mode

The control modes for RTS are:

Enable
Disable
Input Handshaking
Toggling on Transmit

The Enable and Disable control modes affect RTS processing during a First Level Open. When these control modes are set using the ASYNC_SETDCBINFO, the value of the RTS signal can be immediately modified by the physical device driver. The action depends on the previous control mode of RTS and the current value of the RTS modem control signal. If the control mode of RTS is Input Handshaking, the device driver controls the RTS signal, depending on how full the receive queue is. If the control mode of RTS is Toggling on Transmit, then the physical device driver controls the RTS signal, depending on whether it is transmitting data. The bits that control these states of the physical device driver are in the device control block.

Initial Value Enable
First Level Open No effect
Mode Utility User interface to change the RTS Control Mode of the physical device driver