help with X386?

[Daniel A. Glasser]

In article <1991Apr18.210155.41901 at eagle.wesleyan.edu>
				flinton at eagle.wesleyan.edu writes:
>For what it's worth, DEC's own keyboards (well, their VT220 KB's in VT100 mode)
>send as follows for the keys labeled by DEC as :
>	 ESC [ 1 7 ~		F6
>	 ESC [ 1 8 ~		F7
>	 ESC [ 1 9 ~		F8
>	 ESC [ 2 0 ~		F9
>	 ESC [ 2 1 ~		F10
>	 ESC         		F11 (ESC)
>	 BS                  	F12 (BS)
>	 LF              	F13 (LF)
>	 ESC [ 2 6 ~		F14
>	 ESC [ 2 8 ~		F15 (Help)
>	 ESC [ 2 9 ~		F16 (Do)
>	 ESC [ 3 1 ~		F17
>	 ESC [ 3 2 ~		F18
>	 ESC [ 3 3 ~		F19
>	 ESC [ 3 4 ~		F20
>The only ESC [ 1 2 commands I can find are the SRM (Send-Receive Mode)
>commands ESC [ 1 2 h and ESC [ 1 2 l (for setting that mode off and on, resp.),
>not sent by any keys. So I agree, something odd is happening with your xTerm.

The above shows a minor lack of understanding about how these ANSI X3.64 style
escape sequences work.  The DEC keyboard function keys (not the PF keys on the
numeric pad) all send a sequence of the form <CSI> Pn ~, where <CSI> is the
C1 (8-bit) control character 9B (or <ESC> [ in 7-bit controls mode), Pn is
an ASCII decimal string (actually, it's not ASCII, but it corresponds to
ASCII, so we'll call it ASCII) representing the key number, and ~ is the
code which, in ASCII, represents the tilde character.  The VT2xx/VT3xx/VT4xx
terminals send the following values of Pn for the following keys:

	1	Find
	2	Replace
	3	Select
	4	Remove
	5	Next Page
	6	Previous Page

	11	F1 Hold Screen	(VT420 only)
	12	F2 Print Screen	(VT420 only)
	13	F3 Set-up	(VT420 only)
	14	F4 Session	(VT420 only)
	15	F5 Break	(VT420 only)

	17	F6
	18	F7
	19	F8
	20	F9
	21	F10

	23	F11
	24	F12
	25	F13
	26	F14

	28	Help
	29	Do

	31	F17
	32	F18
	33	F19
	34	F20

The set mode/reset mode (SM/RM) sequences are of the form
	CSI Pm l
and	CSI Pm h
One sets the mode, the other resets it.  For DEC private modes
a ? preceeds the mode number.  You can (on DEC terminals at least)
specify several modes to be set or reset in one command, but they
must all be either ANSI or DEC private modes.

Saying "The only ESC [ 1 2 commands I can find are"... makes no real
sense, since the '1' and '2' are parameters to the command identified
by the introducer (CSI or ESC [), the intermediate characters (none in
the examples given) and the final (h or l for SM/RM, ~ for DEC FN keys).

[Forgive the nit-picking, but I've gotten rather sick of the amount of
misinformation that goes around about DEC escape sequences.  Even most
versions of X-term can't cope with badly formed sequences because of
this type of misunderstanding.  If anyone wants a full paper on how these
things are formed, please send me e-mail and I'll send you something long
winded, but accurate.]

						Daniel A. Glasser
						(Once apon a time a
						 member of DEC Terminals
						 Engineering where I learned
						 this stuff.)

-- 
Daniel A. Glasser                       One of those things that goes
dag%gorgon at persoft.com                  "BUMP! (ouch!)" in the night.