Hmm, interesting; that would be the case in a
'normal' comm session as well though, wouldn't it?
Assuming you're checking for an XOFF after every
character sent you should be able to handle an
'overload' of 24 characters, no? That would be an
unusually long escape sequence...
Steve spent some time a while back trying to
expand the M100's receive buffer but it turned out
to be more complicated than it seemed at first and
not worth spending more time on; since you need
some kind of external hardware anyway to connect
to the net it makes more sense to handle as much
of the 'protocol' as possible externally as you're
doing.
I use a couple of Lantronix servers ('modems'):
http://www.lantronix.com/device-networking/external-device-servers/uds-10.html
The size of the packets sent to the RS-232 port
can be set as low as 1 character and I've never
had any overflow issues, but then again I haven't
sent any long escape sequences.
Definitely something to investigate, but if it
works, hey...
Thanks; I'll try to find time ASAP for a bit of
testing.
m
----- Original Message -----
From: "Kurt McCullum" <[email protected]>
To: "Model 100 Discussion"
<[email protected]>
Sent: Saturday, July 18, 2015 6:27 PM
Subject: Re: [M100] Telnet Success
Mike,
The overload happens when you send an escape
sequence to the ModelT. When I was writing
mComm, I found that a sequence of escape
sequences for say, clear screen, move to home,
reverse video ect would be executed before
sending and XOFF. So if you are sending data
rapidly during that time, it overloads the
serial buffer. So a slight delay after every
escape sequence keeps the ModelT happy.
Alpha version.... let me see what I can put
together. It's just a stand alone bridge right
now. I'll put some controls on the page so you
can enter a web site and pick a com port. right
now that's all hard coded.
Kurt
On 7/18/2015 3:12 PM, MikeS wrote:
Sounds very interesting!
Not sure what you mean by "overloading ... when
escape sequences are encountered"; are there
issues specific to escape sequences or are you
talking about buffer overflow when XOFF is not
acted on quickly enough?
Care to send me an alpha version to play with?
m
----- Original Message ----- From: "Kurt
McCullum" <[email protected]>
To: "Model 100 Discussion"
<[email protected]>
Sent: Saturday, July 18, 2015 5:40 PM
Subject: [M100] Telnet Success
I finally have some prototype code working
that bridges a serial connection to telnet and
handles the overloading of the ModelT com port
when escape sequences are encountered. I've
used it to log into some BBS systems but
unfortunately the 40 character screen is an
issue even on the T200. It's still a work in
progress and very rough at this point but I
will keep everyone posted on the progress. At
some point I hope to add this code to mComm to
give users access to some of the Telnet
systems out there.
Kurt
