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1992-04-27
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========================================================================
== ME2 Errata and machine/OS specifics Craig Durland ==
========================================================================
========================================================================
BUGS
========================================================================
* MS-DOS
If you install TSRs (terminate and stay resident - things like Side
Kick) from within ME (ie ^X! or from a shell invoked by ME) and
don't exit ME, there is a good chance that sometime later ME will
not be able to write out files (it will say something like "Error
closing file"). If this happens, you are screwed - your file is
cleared from the disk and there is no way you can save it.
Another symptom is problems allocating memory ("Cannot allocate x
bytes"). print.com is the only TSR I have verified causing these
problems but don't press your luck.
Note: is OK to use TSRs from within ME. ie using print.com to
print a file while in ME is OK as long as print was installed
outside of ME.
EGA 43 line mode: If you are using nansi.sys, switching into 43 line
mode and then invoking a shell or running a program (^X!) the cursor
may disappear. This is caused by a bug in nansi.sys. When going
into 43 line mode it should set 40:87H bit 0 and clear that bit when
returning to 25 line mode but it don't.
* UNIX
XON/XOFF can screw things up. ME turns off XON/XOFF because XON is
^S and XOFF is ^Q and most Emacs users are very attached to those
keys. This can lead to terminal overruns if the terminal cannot
keep up at the baud rate selected or there is not enough padding.
Sometimes the connection to the computer runs though a server
device that also talks XON/XOFF. If this is the case ^S will stop
the display and some times ME will start searching for no apparent
reason. Talk to a guru and find out how to fix the server or
rebind ^S and ^Q to "" and use the alternate keys (^\ and ^^).
Softkeys: Most terminals send escape codes when you press a function
key or softkey. This is a problem when the codes overlap valid ME
user key sequences (eg HP terminals send "ESC B" for down arrow which
is also the ME sequence for (backward-word)). The version of ME for
HP terminals (MEH), trys to tell the difference with timing, however,
this method if far from foolproof. To tell if you have a problem,
type ^X^V (visit-file) and then press a function key (such as down
arrow) rapidly. You should see
F-DF-DF-DF-DF-DF-DF-DF-DF-DF-DF-DF-DF-D. If you don't or see
something like F-DM-BM-BF-DF-DM-B you have a problem and you have to
either give up softkeys or the mappings they cover. Or get a
"better" terminal. Regular ME leaves soft key processing to Mutt
pgms (see vt100.mut for an example).
=========================================================================
MS-DOS specifics
=========================================================================
* Filenames can contain "/" or "\". Case is ignored.
* Filename completion may be turned off. If not, you can use csh like
wild cards. See UNIX specifics.
* Strango characters
MS-DOS ME allows you to enter ^Z or NULL (0) and write out the file but
a line with NULL in it gets truncated (at the NULL) when read in.
Some versions allow you to enter a character by typing in its decimal
value (eg "A" is decimal 65) (see below). Note that entering most
keys is like pressing the key on the keyboard so you may want to
quote (^Q) the character.
IBM PC: hold down ALT and type the value on the number pad. The
character is added when the ALT key is lifted.
Portable Plus: Put into Num pad mode (Extend Num), hold down Extend and
press the value on the number pad (the blue numbers). The character
is added when the ALT key is lifted. Now switch back to regular mode
(Extend Num). This is easier to do than to say.
* Portable Plus version:
The Clr dsp, +Line and -Line function key are not mapped.
* HP150 version:
The function keys (f1...f8) don't work unless the user keys are turned
on AND f1 is programmed to send Normal ESCp, f2 Normal ESCq, ... f8
Normal ESCw. This is because of a bug in the 150.
This can be done with:
(puts "^[&f0a1k5d2L f1^[p") (puts "^[&f0a2k5d2L f2^[q")
(puts "^[&f3k0a5d2L f3^[r") (puts "^[&f4k0a5d2L f4^[s")
(puts "^[&f5k0a5d2L f5^[t") (puts "^[&f6k0a5d2L f6^[u")
(puts "^[&f7k0a5d2L f7^[v") (puts "^[&f8k0a5d2L f8^[w")
(puts "^[&jB")
========================================================================
UNIX specifics
========================================================================
* You can use csh style wildcards: ~, [], [^], ?, * (eg ~craig,
~/tools, foo[123], foo*, etc) for (insert-file), (read-file),
(rename-buffer), (visit-file), (write-file) and current-directory.
Note that ? and " " are also used for filename completion so you
might want to quote them (^Q?).
See dir.mut for examples of cwd, dirs, push directory, pop directory.
========================================================================
Color, inverse video, fonts, etc
========================================================================
* This is very machine dependent. See modeline-color, text-color in
MEMUTT.DOC.
IBM PC fast video (CGA, EGA):
bit7-> |blink|R|G|B| |intensity|R|G|B| <-bit 0 (foreground)
where R=red, G=green, B=blue, blink makes the character blink and
intensity only affects the foreground color.
For example:
green foreground, blue background: |0|0|0|1| |0|0|1|0| ==0x12 ==18
monochrome inverse video: |0|1|1|0| |1|1|0|1| ==0x6D ==109
Portable Plus:
bit7-> |0|0|f1|f2| |0|underline|inverse video|blinking|
where f1f2 are the font selector: 00 for normal font, 01 for stick
For example: inverse video stick font: |0|0|0|1| |0|0|1|0| ==0x12 ==18
HP150, UNIX:
0: normal, 1: half bright inverse video.
Note: If the color is set to something outside this range, you get
normal color for everything and slightly faster screen updates -
ie the color stuff is ignored. Do this if the color is screwing
up your screen.
ANSI mode: This has been tested only on IBM PC like things.
The format is xxyy. xx is one color and yy is the other. These
numbers come from the ansi spec for the ansi set graphics
rendition (SGR) escape sequence.
For example: if 32 is green foreground, 41 red background and 44 is
blue background, then (text-color 3241)(modeline-color 4432) sets
green text on a red background with the modeline green text on a
blue background.
* Screen size:
Sometimes the same code runs on machines with different screen sizes.
If this is your case, you'll need to resize the screen.
For example:
HP110: use me150.exe and put (screen-length 16) in your myme file.
EGA 43 line mode: If you have a IBM PC, EGA and NANSI.SYS (or some
other way to get into 43 line mode), ME can use all 43 lines.
If you are already in 43 line mode: (screen-length 43).
To switch into 43 line mode: (puts "^[[=43h")(screen-length 43)
2 handy pgms:
(defun
EGA {(puts "^[[=43h")(screen-length 43)}
noEGA {(puts "^[[=3h")(screen-length 25)}
)
========================================================================
Philosophy
========================================================================
* ME should behave the same on every machine it runs on.
* ME is an editing engine.
The core functionality should allow ME to be used stand alone. The
core has been patterned after (a subset of) Emacs (where Emacs is
usually Unipress (Goslings') Emacs or GNU Emacs).
The bells, whistles and features that "personalize" an editor are
Mutt extensions added by the user.
* If you find bugs I want to fix them so let me know.
If you have enhancement requests or stuff you would like to see added,
I am interested.
Restrictions:
Distributed under the terms of the GNU General Public License.
* No Warranty - you get what you pay for.
* I am:
Craig Durland (503) 750-3354
3419 SW Knollbrook, Corvallis, OR 97333
craig@cv.hp.com