Fwd: [Oberon] Dynamically changing video mode ?
jan verhoeven
---------- Forwarded Message ----------
Subject: [Oberon] Dynamically changing video mode ?
Date: Fri, 31 Mar 2006 17:24:36 +0200
From: easlab
To: oberon
When linux enters X-window mode, [depending on the installation]
it's possible by Ctrl/Alt/+ to step the display resolution.
A bit like N-O can step mouse-types to allow the user to select
a suitable type, based on observing the behaviour of the various
selected types.
It would be convenient to sometimes be able to change the N-O
display resolution. Eg. the most standard mode [VGA 640*480 I
guess] is good/comfortable, but some panels eg. V24.Panel and
FontEditor.Panel overflow the UserTrack and would be better
with a higher resolution. Provided this can be acheived without
re-booting.
When booting [from a diskette], <leftShift> shows the startup
parameters, which can be changed. This is eg. convenient
to change the 'root partition'. Obviously the video mode
displayed argument can also be changed.
Q - for trace at that stage: "<display=VGA>" is for VGA, but
what are the arg-strings for the other valid args ?
Configure.Tool , a tricky utility, which implements an
'active menu' without even using Gadgets [I want to
discuss this in another thread], has a sequence of:
Config.Display <arg1> <arg2> eg:
Config.Mode VGA 16-color
Config.Display ATI Mach64 .
<?! the Configure.Tool self-modifying text is very tricky; the commands
are apparently context sensitive, since they don't operate isolated
eg. out of the Configure.Tool , eg. in this email ?!>
Since text-strings appear AS the exact same text-strings
in the *.Obj files which uses or accesses/compares them
[There's no point in hiding/encoding them]...
Q- why can't I find "Mach64" in Config.Obj,
nor in Config.Mod ?
I'm speculating that the leaf-nodes of the 'active menu' tree
which Configure.Tool implements, each generate an arg-string
[probably many are common] which could be manually entered
at boot time to change the video mode.
Q- is this true & are they listed somewhere ?
Ie, what's the boot-arg string for video mode:
Config.Mode ATI Mach64: 1280*1024*16 ?
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I also speculate that the relevant *.Obj files could be replaced
at run time to change the video-mode 'dynamically' .
Q- is this viable ?
Thanks for any input.
== Chris
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Met vriendelijke groeten
Jan Verhoeven
http://fruttenboel.verhoeven272.nl