[net.emacs] Z19s and Emacs

whm.arizona@Rand-Relay (03/30/83)

I often have problems when using a Z19 terminal with Emacs.  In certain
cases, the terminal seems to be unable to keep up with Emacs.  Often
when I'm scrolling through some Mlisp source, the terminal will send
a ^S-^Q sequence down the line.  I've tried binding ^S and ^Q to
"novalue", but to no avail.  The screen ends up garbaged as often
as not.  I can redraw the screen without any trouble, but if I try
moving through the file, or to a different place in the file, the
terminal often sends the ^S-^Q sequence and the screen just turns
to dog food.  BTW-This is when running at 9600 baud.

Are there any solutions to this problem, or am I just stuck?  Note
that this is very data dependent.  I never encounter this problem
when editing English text, almost never for Icon, very rarely for C
text, and almost always for Mlisp.  Would I be able to go beat on
Zenith, or is it implicit that programs should be able to respond
to flow control sequences.
 
Any ideas will be greatly appreciated and if received in time, may
save this office terminal from a ritualistic death.


					Thanks,
					Bill Mitchell

jim@uw-beaver (03/30/83)

From:  Jim Rees  <jim at uw-beaver>

I use my z19 8 hours a day, 5 days a week, and have absolutely no
problem with ^S-^Q.  The trouble is that the termcap entry supplied
with 4.1bsd has the wrong values for insert/delete character delays.
Here is the entry I use:

kb|h19|heath|h19b|heathkit|heath-19|z19|zenith|heathkit h19:\
	:al=1*\EL:bs:cd=\EJ:ce=\EK:cl=\EE:cm=\EY%+ %+ :co#80:dc=\EN:\
	:dl=1*\EM:do=\EB:ei=\EO:ho=\EH:im=\E@:ip=2:li#24:mi:nd=\EC:\
	:as=\EF:ae=\EG:\
	:ms:pt:sr=\EI:se=\Eq:so=\Ep:up=\EA:vs=\Ex4:ve=\Ey4:\
	:kb=^h:ku=\EA:kd=\EB:kl=\ED:kr=\EC:kh=\EH:kn#8:\
	:k1=\ES:k2=\ET:k3=\EU:k4=\EV:k5=\EW:\
	:l6=blue:l7=red:l8=white:k6=\EP:k7=\EQ:k8=\ER:

whm.arizona@Rand-Relay (03/31/83)

Thanks for the quick answers to my question about the trouble I've
been having with my Z19 when working with Mlisp.  As several
people (Jim Rees, Bjoren Davis, and Peter Norvig) pointed out,
the problem is indeed a lack of padding at certain times, adding
an :ip=1.5: entry to the h19 termcap takes care of the problem.

					Bill Mitchell

crc (04/01/83)

About Z19s and emacs - what speed was this?  When you complain about
some terminal choking on emacs, specify the speed, terminals that choke
at 19.2k baud are much better than one that choke at 1200 baud.

		Yours for faster terminals,
		Charles Colbert

		Not (afraid to demand 1 MEG baud && Emacs);