I installed MeOS v 0.76 and have the following problem:
When a window is moved across the desktop the redrawing of the desktop icons is quite slow why? Is it problem with my videocard (Voodoo Banshe 16mb video memory with vesa v3.0) or it is the os?

up

Did you activate MTRR graphics acceleration?

What exactly is MTTR anyways?

It's because original ICON application uses 1st function (put pixel) to draw window and pixels are calculated in time between two pixel puts:
1. calculate pixel color
2. put pixel (function 1)
3. goto 1

You can try my version if ICON (http://meosfiles.narod.ru/index_eng.htm) which draws to buffer and then uses 7th function (put image), and supports 32x32 32-bit .ICO files also BTW

Iirc MTRR is an abbreviation for "Memory Type Range Registers". There's a few of these, programmed with MSRs (Model Specific Registers, see RDMSR/WRMSR).

The MTRR's can control things like cachability, write-combining, and such. It's probably documented in the intel docs, probably the Systems Programming ones, if not it should be on sandpile.org .

[quote="Gomer73"]What exactly is MTTR anyways?[/quote]

A bit on MTTR.

On Intel P6 family processors (Pentium Pro, Pentium II and later)
the Memory Type Range Registers (MTRRs) may be used to control
processor access to memory ranges. This is most useful when you have
a video (VGA) card on a PCI or AGP bus. Enabling write-combining
allows bus write transfers to be combined into a larger transfer
before bursting over the PCI/AGP bus. This can increase performance
of image write operations 2.5 times or more.

The Cyrix 6x86, 6x86MX and M II processors have Address Range
Registers (ARRs) which provide a similar functionality to MTRRs. For
these, the ARRs are used to emulate the MTRRs.

The AMD K6-2 (stepping 8 and above) and K6-3 processors have two
MTRRs. These are supported. The AMD Athlon family provide 8 Intel
style MTRRs.

The Centaur C6 (WinChip) has 8 MCRs, allowing write-combining.

The VIA Cyrix III and VIA C3 CPUs offer 8 Intel style MTRRs.

L8r

benchmark with or without mtrr?

BTW, it will be good IF menuetos is more faster regardless of MTRR.

Mike, I tried your icon app; I couldn't get it to work with .ico files. Can you explain how to do this?

Thanks,

Mike.

Just replace the original icon by his one, to use ico files (only 32x32xtrue color) just use the extension .ico in your icon manager
it doesnt works (yet) with ico files that contain more than one resolution

Well, .ico file must contain only one icon 32x32, 32-bit, it means, transparency works. File size - 4286 bytes.

I created some 32 colour icons, and got it to work :o)

Thanks,

Mike