Hi all, thanks for the help/advice!
Peter, the table you posted comes closest to what I was originally looking for.
I think I will end up just doing some testing to identify the troublesome
control sequence and find out how much padding is needed in each case. I’ll
post back the numbers I find (thought it may be a little bit before I get back
to this particular project).
I do not think the VT100 supports hardware flow control.
Interesting the comments on the USB serial converters — I am using a Keytronics
(now Tripp-Lite) USA-19H, and I think these are generally well regarded? But
thinking on it, I bet USB has something to do with it here — perhaps buffer
latency through the USB drivers is keeping software flow-control (xon/xoff)
from functioning effectively at higher baud rates, which is another reason I
think proper padding values might be a good alternative.
Another idea that might work would be to take an FPGA proto board that I have
and hack up a better serial port — something with some buffering and xon/xoff
logic sitting downstream of the USB interface.
cheers,
—FritzM.
