Any idea on how Windows changes the Video Mode?

Question about which tools to use, bugs, the best way to implement a function, etc should go here. Don't forget to see if your question is answered in the wiki first! When in doubt post here.
User avatar
DavidCooper
Member
Member
Posts: 1150
Joined: Wed Oct 27, 2010 4:53 pm
Location: Scotland

Re: Any idea on how Windows changes the Video Mode?

Post by DavidCooper »

Correction:-

I've been using a VESA 1.2 document up to now, and when I used function 0h to get a list of screen modes on a netbook, the BIOS labelled its reply as VESA 3.0 and gave a list of modes which I assumed was the total range available. Having now tried again after reading a VESA 3.0 document and preloading the information block with "VBE2", three extra modes were returned (plus a host of others that weren't valid). The three extra modes are all 1024x600 widescreen modes of 8, 16 and 32 bits per pixel.

I'm posting this now in case anyone got the impression from an earlier part of this thread that widescreen modes aren't available through VESA.
Help the people of Laos by liking - https://www.facebook.com/TheSBInitiative/?ref=py_c

MSB-OS: http://www.magicschoolbook.com/computing/os-project - direct machine code programming
Post Reply