video mode
-
slacker
video mode
hi. i have beensearching the internet for information about switching from text mode to video mode and i have nt been able to find any web sites that really help. i have found bits and pieces of information like A000:0000 is involved and to switch to video mode u can use interrupts or ports i/o. if anyone would know any good web sites and progamming in video mode i would appreciate it. thank you
-
slacker
Re:video mode
umm. ok. that didnt do much. anyone thing else on like how to enter this mode and how video memory at a000 works?
-
Dav
Re:video mode
If you are in Real Mode it is quite easy to set the video mode, just call interrupt 0x10, ah=0x00 (set video mode function), al = desired video mode.
You can find the different video modes at:
http://www.ctyme.com/intr/rb-0069.htm#Table10
0x13 is the VGA 320x200x8bit graphical video mode.
However it is more than likely that you are in protected mode, in that case i can't help you.
Each byte in the video memory at 0xA0000 represents a single pixel on the screen. The value of this byte is an index into a color palette.
Great article on Video Mode 0x13:
http://www.geocities.com/SiliconValley/Park/8933/vga.html
Hope this helped.
You can find the different video modes at:
http://www.ctyme.com/intr/rb-0069.htm#Table10
0x13 is the VGA 320x200x8bit graphical video mode.
However it is more than likely that you are in protected mode, in that case i can't help you.
Each byte in the video memory at 0xA0000 represents a single pixel on the screen. The value of this byte is an index into a color palette.
Great article on Video Mode 0x13:
http://www.geocities.com/SiliconValley/Park/8933/vga.html
Hope this helped.