Solved

Vesa Modes

Posted on 1998-10-30
6
497 Views
Last Modified: 2012-08-14
Hello,
How do you use 640x480x256 without using VESA.  If it is using VESA, would it work to switch banks on my S3 accelerrator card.  The fastest way is the way I want.
Thankx.
0
Comment
Question by:Raid
6 Comments
 
LVL 2

Expert Comment

by:joe_h
ID: 1215910
Using 640x480x256 without VESA is hardware-specific; that is, if it works with a videocard from one manufacturer, it's almost for sure that it won't work with a different one. That's why VESA was accepted; nowadays, all not-so-obsolete cards support it.

Specifically, 640x480x256 is mode 101h.
To switch banks, you would call int 10h function (ax=) 4F05h, with bx and dx set accordingly. There is a faster way: at the beginning of your program, call int 10h function 4F01h, which will tell you an address of VESA information buffer. There you can get a far call address to call the 4F05h function directly.

Let me know if you need further details, or if you want to make this an answer.

HTH, Joe

0
 

Expert Comment

by:Phoenix020397
ID: 1215911
I have a BGI file that lets you load graphics mode in 640x480x256 resolution. (For Ansi pascal...)

Email me at PhoenixF@writeme.com and I'll send it to you and teach you how to use it.
0
 

Author Comment

by:Raid
ID: 1215912
Sorry Pheonix, I have means to access 640x480x256, but thanks for trying to answer anyway.

0
Does Powershell have you tied up in knots?

Managing Active Directory does not always have to be complicated.  If you are spending more time trying instead of doing, then it's time to look at something else. For nearly 20 years, AD admins around the world have used one tool for day-to-day AD management: Hyena. Discover why

 

Author Comment

by:Raid
ID: 1215913
And Joe_h, yes, give me further details on how to switch banks using VESA, VERY FAST bank switching and copying(bytes).  Please E-mail me COMPLETE instructions and details at this address, (and yes I am fimiliar with some assembly language).

Address:
arcwolf@mb.sympatico.ca

Thank you in advance
P.S. Yes you can turn it into an answer.
0
 
LVL 2

Accepted Solution

by:
joe_h earned 50 total points
ID: 1215914
See my comment below....

And, by the way, VESA BIOS calls are well-documented in the Ralf Brown's Interrupt List, available at http://www.pobox.com/~ralf/files.html.

Joe

0
 
LVL 4

Expert Comment

by:jack_p50
ID: 1215915
Hi Raid. See the Grafx unit that i told you - it implements hardware accelleration of most
graphic cards and is very fast.
0

Featured Post

Master Your Team's Linux and Cloud Stack

Come see why top tech companies like Mailchimp and Media Temple use Linux Academy to build their employee training programs.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

This tutorial shows how to create a greeting card by combining two image layers and a text layer on a PC using a free image editing app.
Adding Computers to AD groups through an SCCM Task Sequence
This Micro Tutorial hows how you can integrate  Mac OSX to a Windows Active Directory Domain. Apple has made it easy to allow users to bind their macs to a windows domain with relative ease. The following video show how to bind OSX Mavericks to …
This video shows how to use Hyena, from SystemTools Software, to bulk import 100 user accounts from an external text file. View in 1080p for best video quality.

778 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question