Asus Motherboard PR-DLS533 - Manual (Page 80)

4-20 Chapter 4: BIOS Setup
4.4.3 PCI Configuration
Slot 1, Slot 2, Slot 3, Slot 4, Slot 5, Slot 6 IRQ [Auto]
These fields set how IRQ use is determined for each PCI slot. The
default setting for each field is [Auto], which utilizes auto-routing to
determine IRQ use. Configuration options: [Auto] [NA] [3] [4] [5] [7] [9]
[10] [11] [12] [14] [15]
PCI/VGA Palette Snoop [Disabled]
Some non-standard VGA cards, like graphics accelerators or MPEG video
cards, may not show colors properly. Setting this field to [Enabled] corrects
this problem. If you are using standard VGA cards, leave this field to the
default setting [Disabled]. Configuration options: [Disabled] [Enabled]
PCI Latency Timer [32]
Leave on default setting for best performance vs. stability.
Sparse PCI Host Bus [Disabled]
This field allows you to reserve the bus number for the PCI slots.
Configuration options: [Disabled] [2 BUS] [3 BUS] [4 BUS]