1.1.6 build fails on FC30

[Hal Murray]

> Because RS232 signaling is negative logic.

That's what I used to think, but somebody corrected me many years ago.

The data is upside down but the control signals are not.


>From https://en.wikipedia.org/wiki/RS-232
under Voltage levels

For data transmission lines (TxD, RxD, and their secondary channel 
equivalents), logic one is represented as a negative voltage and the signal 
condition is called "mark". Logic zero is signaled with a positive voltage and 
the signal condition is termed "space". Control signals have the opposite 
polarity: the asserted or active state is positive voltage and the de-asserted 
or inactive state is negative voltage. Examples of control lines include 
request to send (RTS), clear to send (CTS), data terminal ready (DTR), and 
data set ready (DSR).


-- 
These are my opinions.  I hate spam.