27 Feb
2013
27 Feb
'13
6:35 a.m.
On Wednesday (02/27/2013 at 12:53AM -0800), Earl Evans wrote:
Hi all,
Regarding the comments on baud rate and flow control - still doesn't make
sense to me why the VT100 would not exhibit the error with a real PDP-11
(at 9600 baud), but does do it with the emulated PDP-11. The info is coming
at the terminal at the same rate - why would the behavior be different?
Although the bit rate for each character may be the same, the delay
between characters is likely to be greater on the real PDP-11 than the
(faster) emulated one. So, it is the character rate and not bit rate
that matters.
The faster character rate doesn't give the terminal enough time to unload
its receive queue and process the characters (and escape sequences)
like it has with the real PDP-11. Without flow control, you evenutally
overrun the terminal's receive queue and start dropping characters and
screwing up escape sequences.
--
Chris Elmquist