INMC News – Christmas 1979, Issue 5

EDITOR FEATURES	ZEAP 1.1	ZEAP 2.0	ZEN	V & T
To display a group of Lines	Specify start and/or end line number. Pause facility	Specify start and/or end line numbers. Pause and lines per page features	Move pointer to start of group, then specify number of lines to display.	Specify start and end line numbers. Lines per page feature automatic.
To enter a line	Type in the line with the line number, Line numbers can be provided by the system.	Type in the line with the line number, NAS-SYS editing available for corrections, Line numbers can be provided by the system.	Move pointer to position to start, then enter the lines, The line number is provided by the system, always.	Add single line by specifying line number, or add a group of lines starting at a certain line. Line numbers are provided by the system.
To delete lines	A single line or a group can be deleted	A single line or a group can be deleted	A single line or a group can be deleted	A single line or a group can be deleted.
To edit a line already entered.	Editing mode allows full editing of a single line, including insertion/deletion.	NAS-SYS editing using cursor control keys allows very clear and easy editing including insertion/deletion.	No editing possible. Line must be replaced by re-typing.	No editing possible. Line must be replaced by re-typing.
Compression of source code, to save valuable RAM	None	None	None	None
Search for character string	Yes, including continued search. Only from start of file. Only up to 6 characters.	Yes, including improved continued search. Only from start of file.	Yes, from any point, (but no editing – see above).	No
Remembering	Yes	Yes	Not needed because system supplies line numbers	Yes
GENERAL PEATURES
Source code supplied	No	No	Yes, good Listing but only partly commented.	No
Adaptability to other systems	No	Only by author	Yes, quite easy	No, but it includes an amazing ability to relocate itself to any address. All work areas can be put anywhere in memory.
Storage of source code on cassette	Yes, but better to use NASBUG Read/Write	Yes, but better to use NAS-SYS Read/Write	Yes, uses own routines. Can append files. This did not seem to work very reliably.	Yes, uses NASBUG routines.