EDITOR SECTION 7. 3
EDITOR OPERATION
7. 3.1 The Editor is incorporated in the operating system as a built-in
function and operates as a file-based system.
7.3.2
7.3.3
When a file is loaded into the Editor,
it is placed in the TPA (see
section 3.3), the 54K workspace used by HUNTER. This is the only
area in which the Editor operates on a file. The whole file must be
loaded.
The maximum text file size wich can be edited is 54K bytes.
Basic Files
If an encoded Basic file is loaded, then it is first un-entokened to
ASCII characters. This is because the Editor will only operate in
ASCII within its work area. A short delay of a few seconds on entry
and exit to the Editor will occur when operating on Basic files.
This delay obviously gets longer with larger programs.
The Keyboard
The diagram of the keyboard shown in Fig 7.1, shows the function
associated with each key when used as a control key (i.e. hold down
CTL/FN and press the appropriate key).
All the function keys are replicated
f~ control keys which conform
broadly to the layout used by Wordstar •
NOTE: The Editor uses the virtual screen, so the cursor keys (fully
described in section 2.6) may be used to scan around the text in the
virtual screen.
The label line cannot be turned off with LBL when in the Editor.
The operating system scans the keyboard every 18ms and stores the key
code in a 32-key keyboard buffer. This buffer is examined by the
user's program and operating system whenever necessary. When in the
Editor mode, the operating system is examining this buffer and taking
appropriate action when necessary. There are occasions when the
screen handler cannot keep pace with keyboard entries due to
considerable and repetitive editor workspace access. This may become
a problem when an excessive number of character delete key operations
are performed.
It is, therefore, advisable not to invoke the auto-
repeat function when only a limited number of deletes are required.
VER.V09F
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