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Old 10-12-03, 07:25 PM   #6
Soul-Crusher
Leadtek 6800GT
 
Join Date: Aug 2002
Location: Albuquerque, NM, USA
Posts: 195
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As you may already know, AGP is basically PCI on steroids. SBA enables the sideband address port. One limitation of PCI is that when a request is made to access system memory, no other requests can be made. Sideband addressing removes this limitation.

To enable it, you may edit the line in the os-registry.c file containing "NVreg_EnableAGPSBA" to 1, or you can enable it when loading your nvidia module. I forget the insmod / modprobe syntax, but I think you can just add the NVreg_EnableAGPSBA=1 as an argument like this:
insmod nvidia.o NVreg_EnableAGPSBA=1

Toy around with it if you get the chance, I'll check later on myself and post instructions if I figure it out.
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