AGP Apeture (Sp?) size, how to set it

[(Medieval)]

I have 64 pc100 ram, Cel 366-412, Asus p2-99 (very similar to the P2b series), and a Xentor TNT2 16mb video card..

I was wondering.. how do I set how much memory is used for textures? And what is it set to by default?

I can't seem to find this setting in the bios, it is not mentioned in the manual, is it a vid card thing or a motherboard thing?

[a Bill]

Memory is fixed, no adjustments available unless you are good with a soldering iron.