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1990-07-17
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4KB
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87 lines
_______________________________________________________________________________
ModeInfo 1.01 (RISCWARE) -------------------------------
This program is PUBLIC DOMAIN
Version date : 17 Jul 1990 -------------------------------
----------------
- Introduction -
----------------
ModeInfo gives extensive information about screen modes, either standard OS
modes or extra modes that may be available in modules.
--------------
- Info given -
--------------
The information given is mainly VIDC information, such as the values for all
important registers and their meanings, and some miscellaneous other things.
Most of the information is self-explanatory.
VIDC register values are shown 'corrected', i.e. they reflect 'pixels' and
'rasters' as appropiate, as detailed in the VIDC data sheets. The control
register (&E0) information is the (hex) value of its lower byte and this is
further split up into the resulting values for the pixel rate, bits per pixel,
etc..
The horizontal and vertical scan frequencies and lengths of the horizontal
and vertical sync pulses are calculated.
All new modes in modules are based on OS modes. Wherever values for the new
mode differ from the values for the base mode, the latter are shown behind
the former in light grey. This makes it easy to examine what has been changed
to construct the new mode. The value in light grey behind the mode number is
the VIDC base mode (for non-OS modes).
Unfortunately Acorn have put no SWI in RISCOS 2.00 to find out VIDC register
settings for the standard OS modes. This forced me to search the OS ROM and
use an obviously OS version dependant pointer to them. Therefore, this
application does not currently work on any other OS than RISCOS 2.00.
-------------------
- The application -
-------------------
ModeInfo is a full RISCOS multitasking application, and will install itself
on the iconbar when you double-click on the '!ModeInfo' application.
The iconbar menu, popped up by clicking MENU on the iconbar icon, has the
usual 'Info' and 'Quit' icons.
By clicking with SELECT or ADJUST on the iconbar icon, the information window
will pop up, and the current mode's information is shown.
The 'Modes' icon gives access to a window in which all available modes are
represented by icons. Icons for modes that are not currently available will
be shaded. By clicking on a mode icon, the information window will be updated
(or popped up) to show the selected mode's info.
If modules with new modes are loaded after !ModeInfo (or if any modules are
deleted/de-activated), the 'Modes' window will not correctly show the available
modes. Simply click on the 'Modes' icon to re-scan them.
If you have complaints, comments or bugs(!) to offer me, write to :
John Kortink
Middelhuisstr. 17
7482 EL Haaksbergen
The Netherlands
New versions are available from the same address : just send some money
to cover postage and a self-addressed envelope containing a 3.5" disc.
You will then also receive the latest versions of several other Zeridajh
applications.
_______________________________________________________________________________
!!! NOTE !!!
You may NOT change this application or use ANY part of it in other products
without my approval. You may spread it freely (with *ALL* files included), but
not for any profit. This software is provided 'as is'. Using it is entirely at
your own risk.
_______________________________________________________________________________