TECO Version 29

This memo describes new features in TECO version 29.

These features apply to RSTS/E, RSX-11, RT-11, and IAS.

1.	The ^U TECO command may now take a numeric argument.

	n^Uq$	Stores the character whose ASCII code is n
		into the text storage area of Q-register q.

	n@^Uq//	is an alternate form of this command.

		Either form may be colon modified, in which case the
		specified character is appended to the end of the
		text already in Q-register q.

2.	F_text1$text2$ is now implemented.  This is similar to FS and FN
	but uses the _ form of the search command.
	The command may take a numeric argument.  It may be colon
	modified.  It may be @ modified.

	This command does not work if there is text in the buffer and an
	output file is open and Yank protection is requested (ED bit 1 off).

3.	The ^V (version number) command has been eliminated and replaced
	by the EO command.  EO returns TECO's current version number
	(29 for this release).

	The old usage of ^V conflicts with case control commands
	on other implementations of TECO.

4.	The ^R (replace) command has been eliminated.  It is exactly equivalent
	to the FS command.

5.	Vertical tab (executed as a TECO command) is now an error.
	In previous versions of TECO, the vertical tab command was
	ignored.

6.	Two new string build characters are permitted inside search
	strings.

	^V	converts the next character (if it is alphabetic)
		to lower case.

	^W	converts the next character (if it is alphabetic)
		to upper case.

7.	The string build construct ^^ has been eliminated.  The search
	build construct ^V should be used instead.

8.	The "V and "W commands have been interchanged to make them agree
	with other TECO implementations.

	n"Vcmds'	executes the commands specified if n is the ASCII
			code for a lower case alphabetic character.

	n"Wcmds'	executes the commands specified if n is the ASCII
			code for an upper case alphabetic character.

9.	Two error messages have been changed.

	?ICC (Illegal character after ") is now ?IQC .

	?IQR (Illegal Q-register Name) is now ?IQN .

	This change only affects the 3-character code portion of
	the error message.

10.	The ^W (Watch) command has been eliminated and replaced by
	the W command.  n^W has been replaced by nW .

	The old usage of ^W conflicts with case control commands
	on other implementations of TECO.

	This change may require you to fix up any macros which
	you might have which are used to drive a VT52 or VT-11 scope.

11.	The ^G<space> and ^G* immediate mode commands have been
	changed so that when reprinting the command string,
	the first line is preceded by a "*" representing TECO's
	prompt character.

12.	The A (Append) command may now be colon modified.

	:A	appends one line of text from the current input stream
		to the end of the text buffer.  A partial line might be read 
		in if the text buffer is very full.  (TECO will stop
		reading characters when there are only 128 character
		positions remaining in the text buffer.)

13.	The format of the ED (Edit Level) flag has been changed.
	The flag has now been set up so that each bit has a meaning.

	Bit	Bit value	Meaning

	0	1		if 0, up-arrow's in search strings convert
					the next character to the
					corresponding control character.
				if 1, up-arrow's in search strings are
					considered to be text.

	1	2		if 0, Yank protection is instituted; this
					will cause the Y and _ commands
					to abort if there is text in the
					text buffer and an output file
					is open.

				if 1, all Y and _ commands are legal at
					any time.

	The other bits are reserved for future use and should always
	be 0 at this time.

	The 1ED command works the same as it used to.

	The function which used to be performed by the -1ED command
	is now performed by the 2ED command.

14.	The ?NAY (Numeric Argument to Y command) error message
	has been added in case you perform an nY command.
	The proper syntax for this function is n<Y> .

15.	The value of the EH command has been slightly modified.
	What used to be 3EH is now 4EH.
	3EH is reserved for possible future use and currently acts the
	same as 2EH.

	Bit 2 of the EH flag is now independent from bits 0 and 1.
	
	Bits	Bit Values	Meaning

	0,1	1,2		0	same as 2
				1	error code only
				2	error code plus one-line message
				3	reserved

	2	4		0	no auto-?
				1	auto-? after errors

16.	Two new match control constructs have been added.  These
	may appear inside search strings.

	^EV	matches any lower case alphabetic character.

	^EW	matches any upper case alpabetic character.