27 Feb
2013
27 Feb
'13
9:45 a.m.
On Feb 27, 2013, at 3:53 AM, Earl Evans <earl at retrobits.com> 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?
That would be true if the real PDP-11 sent characters at full throttle
all the time, but in general it does not. There's generally an inter-
character delay. On a faster system, the data can come out full-blast
and swamp the receiver if it can't keep up with the byte data rate.
In other words, the serial hardware is totally capable of handling 9600
baud, but the software managing the display isn't capable of handling
960 characters per second sustained.
- Dave