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Editor Features |
ZEAP 1.1 |
ZEAP 2.0 |
ZEN |
V & T |
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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. |
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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. |
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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. |
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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. |
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Compression of source code, to save valuable RAM |
None |
None |
None |
None |
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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 |
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Remembering |
Yes |
Yes |
Not needed because system supplies line numbers |
Yes |
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General Peatures |
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Source code supplied |
No |
No |
Yes, good Listing but only partly commented. |
No |
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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. |
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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. |