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Topics - jailbird

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Applications / VIDEO_MODE_RESTRICTION
« on: November 06, 2021, 01:08:49 am »
So going through the properties on the DOS Session icon, I noticed the setting VIDEO_MODE_RESTRICTION with a comment that says 'Set to CGA to increase available memory to 736K.'.

However, it doesn't matter if I set it to "CGA" or "MONO", the available memory information in MEM doesn't change at all on ArcaOS 5.0.6.  This is under VirtualBox, so maybe VBox isn't following the original PS2 memory layout exactly which is causing it?

I tried http://www.edm2.com/index.php/Stupid_OS/2_Tricks/REXX_Commands#BIGDOS.CMD and that didn't make it change either. Is it working for anybody else?

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I've noticed this for a while now but I only recently figured out the situation.

On any version of VBox from the last couple of years, when you install ArcaOS (any version, I'm using 5.0.6 now), the default resolution is pretty low and everything is good. After installing the VBox Guest Additions and GRADD (in newer releases, ArcaOS will do this for you during install if you tell it to), everything is still pretty good up to about 1024x768. There's probably very slight lag, but nothing really noticeable unless you're specifically looking for it.

At 1280x1024, there's definitely noticeable UI lag just moving the cursor around. Eg, you can definitely see the mouse pointer "stutter" moving it to the XCenter menu button and clicking on something and selecting it.

At 1600x1000, the UI lag is so bad it's very aggregating trying to navigate around.

So it seems like the larger, the slower it is. This is basic 2D stuff, not 3D. Increasing the VRAM assigned to the VM doesn't help.

Is this a generic OS/2-related issue (eg, the way GRADD works), or is it a VBox guest additions issue?

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