Sequencer, sequencer index->

[Peter Swinkels]

Can any one here explain what the video? registers
sequencer index (3c4h) and sequencer (3c5h) do exactly?

I know they can be used to select bit planes in EGA/VGA
modes like this:

mov al, 0x2
mov dx, 0x3C4
out dx, al

mov al, bitplane
mov dx, 0x3C5
out dx, al

What else do these registers do?

[Darkwraith]

I found this:

http://www.bsdg.org/swag/EGAVGA/0052.PAS.html

Hope this helps.