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-
- ------------------------------ V e c S c o p e ----------------------------
- ------------------------------ V 1.00 ----------------------------
-
- This program is Public Domain and may be copied freely.
-
- Purpose
- -------
-
- This utility is capable of monitoring all system vectors in the
- desktop constantly by way of opening one or more windows each
- displaying a vector's counting, it is mainly useful for programmers
- and other expierenced users.
-
- What is a vector?
-
- A vector is in fact a handler to a standard program in your ma-
- chine which is executed when an event occurs, eg when a character
- is send to the screen.
-
- What is the value of VecScope?
-
- 1) Obtain a better knowledge of the working of your Archimedes,
- for example by:
-
- - visually confirm your expectations about operations of
- Risc OS
-
- - discover what operation effects a vector
-
- - see the impact of operations seeming unimportant
-
- 2) Debug programs by visually check your expectations about the
- working of a program under development, especially with the
- vectors concerning fileoperations (FileV,GBPBV,etc).
-
-
- Usage
- -----
- To start VecScope, double click on its icon in a directory
- viewer; it will put itself on the iconbar as usual.
-
- The VecScope icon will only respond to a click on it with the
- middle mouse button <menu>; a menu will pop up with the follow-
- ing items on it:
-
- Info - moving the pointer over the arrow, next to 'Info',
- will show the familiar box containing global infor-
- mation
-
- Vectors - this item has an arrow too; moving the pointer over
- it will pop up a submenu with items explained later
- on
-
- Quit - a click on this item will close down VecScope; this
- means that all the windows belonging to VecScope
- are removed and that the icon disappear from the
- icon bar
-
- Quiting using the taskmanager display is NOT recom-
- mended because in this way the counting of vectors
- may remain active internally!
-
-
-
- Of course the real stuff is started by following the earlier
- mentioned 'Vectors' item.
- The 'Vectors' submenu has five items all having another submenu
- of their own containing the names of all the (32) software vectors
- in your Archimedes.
- By selecting such a name, VecScope opens a window with two numbers
- in it called 'Start time' and 'Count'.
-
- 'Start time' shows the time the window was opened by VecScope,
- so you can roughly estimates the usage of a vector during the
- excistance of the window.
-
- 'Count' is the most importly part of the whole program; this
- value is updated immediately when the vecor was called by your
- Archimedes, giving you the ability to monitor a vector con-
- stantly
-
- Because it is very well possible to open more then one window,
- each window has the name of the vector it is counting as its
- title.
-
- The five items of the 'Vectors' submenu are symbolic names of
- vector groups, they are:
-
- Rarely - this item has a submenu containing vector names
- of vectors that are updated rarely by the system;
- only in special cases the are called more frequently,
- for example when some software uses the UserV vector
- it is increasing otherwise it will remain zero all
- the time.
-
- Regular - vectors belonging to this group are executed regular
- by your machine, for example CLIV is used whenever
- a *-command is issued.
-
- Often - these vectors are called rather often like the WrchV
- vector which is called every time something is written
- to an output device such as the screen and printer.
-
- Constant - the counter in these vectorwindows are updated con-
- stantly, one of them is TickerV, a vector executed
- 100 times in one second to keep the internal time
- up to date; it is not very useful to keep a window
- open for these vectors because the constant updating
- of the counters makes the other programs slower.
-
- Bursts - the last group of vectors are increased in bursts,
- ie only when a program needs it; eg the DrawV vec-
- tor is only used when Draw-operation are performed,
- like in Impression or of course in '!Draw' itself.
-
-
- To emphasis the fun of VecScope I will end with some practical
- examples you can try out for yourself:
-
- - see WordV incrementing every second when '!Alarm' is running;
- it halts when '!Alarm' is removed
-
- - watch the rapid incrementing of CLIV when the directory viewer
- of Application disc 2 is made; this gives an impression of the
- amount of *-commands issued during such an operation
-
- - notice the amount of calls to BgetV when using a *DUMP issued
- from a shell (eg after <f12>)
-
- - observe the calls to ColourV after a mode-change while displaying
- a sprite in '!Paint'
-
- - try loading two copies of VecScope in your desktop (and nothing
- else) and open both their WrchV windows; see how the first copy
- monitors the second and vice versa, when you close one of the
- WrchV windows, the remaining will stop increasing
-
- If you have any suggestions or if you want to give some remarks,
- please don't hesitate to contact me.
-
- In the mean time have fun using VecScope.
-
- 29 june 1990,
-
- Machiel Jansen
- Willem de Zwijgerln 66 1
- 1056 JT Amsterdam.
-