GUI Help!!

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Geek

Joined: 01 Jun 2005
Posts: 26

Geek 01 Jun 2005, 18:18

Hello,

Hey, I really need some help.
I am writing my own OS, and I want it to use high quality
graphics -(GUI based). My problem though is that I cant figure out
how to access video memory in protected mode, well I want to be able to tap into memory greater then 256k of memory located at the usual 0xbfff to 0xAfff and still display it on screen. I also would like to use DMA to access the VRAM.

Can anyone help me to figue this out?

Cool

_________________
Death is not the opposite of life, rather, it is the absence of it.

01 Jun 2005, 18:18

Dex4u

Joined: 08 Feb 2005
Posts: 1601
Location: web

Dex4u 01 Jun 2005, 20:45

Go here: http://board.flatassembler.net/topic.php?t=2164&start=50
and get my compo entry called "CdPod" it has high quality graphics and runs in pmode and is only 512 bytes in size and come with fasm code, it may help.
Note: I was called "ASHLEY4" then.

Also you can take a look at "Dex4u" a OS a team of us are working on.
http://falconrybells.co.uk/

01 Jun 2005, 20:45

Adam Kachwalla

Joined: 01 Apr 2006
Posts: 150

Adam Kachwalla 07 Jul 2007, 01:42

Intel's graphics chipsets are documented here - http://www.intel.com/design/chipsets/Q965_Q963/documentation.htm

07 Jul 2007, 01:42

Mac2004

Joined: 15 Dec 2003
Posts: 314

Mac2004 07 Jul 2007, 11:37

Have you considered using Linear Frame Buffer (LFB)? LFB allows you to access flat video memory while in protected mode.

regards,
Mac2004

http://en.wikipedia.org/wiki/VESA_BIOS_Extensions

07 Jul 2007, 11:37

Adam Kachwalla

Joined: 01 Apr 2006
Posts: 150

Adam Kachwalla 09 Jul 2007, 10:34

If you want quality graphics, you can start off with VESA, which allows 1600x1200 res. graphics

09 Jul 2007, 10:34

Adam Kachwalla

Joined: 01 Apr 2006
Posts: 150

Adam Kachwalla 15 Jul 2007, 00:00

I managed to stumble across this: VESA BIOS EXTENSION (VBE) Core Functions Standard

And believe it or not, it's free this time!

15 Jul 2007, 00:00

Dex4u

Joined: 08 Feb 2005
Posts: 1601
Location: web

Dex4u 15 Jul 2007, 19:05

Cool thanks for the link Smile

15 Jul 2007, 19:05

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