Was that with an actual RS232 port, i.e., a device
using RS232 signal
levels, or a "TTL" logic level serial port? I'm guessing the latter.
I'm not sure what you mean by 'a "TTL" logic level serial port',
please
elaborate. Do you mean signalling used between the UART and line drivers
by any chance, such as with a serial connection made between UARTs without
actual line drivers in between?
Yes. That's the overwhelming majority of usage these days. At least for me
when not dealing with retro gear.