Intergraph TD-x20 Setup Manual page 44

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PCI VGA Palette Snoop
This parameter allows palette data from an installed PCI graphics board to be shared with an
installed ISA graphics board. Since the graphics delivered with the system are PCI-based,
this option is set to Disabled by default.
Allocate IRQ to PCI VGA
When set to No, this parameter frees an IRQ which otherwise would have been allocated to
the PCI VGA card. The default is Yes.
PCI IDE Bus Mastering
When set to Disabled, this parameter deactivates the bus mastering capability of the PCI IDE
controller. The default setting is Enabled.
Use ESCD for PCI IRQ Assignment
If this parameter is set to Yes, when the system boots, it reads ESCD data to determine how
to assign IRQs to system devices and option cards. You can use PnP operating systems to
manipulate this ESCD data to assign specific IRQs to specific system devices and option
cards on subsequent system boots. When the parameter is set to No (default), you can use
the BIOS to assign IRQs to PCI devices regardless of ESCD instructions.
PCI Slot x IRQ Priority
Use these parameters to assign specific IRQs to specific PCI cards when ESCD data is not
being used.
DMA Channel x Usage
These parameters specify whether a given DMA channel is to be reserved for an ISA card, or
is free to be assigned to another device by the PnP BIOS. The options are PnP (default) and
ISA.
IRQ x Usage
These parameters specify whether a given IRQ is to be reserved for an ISA card, or is free to
be assigned to another device by the PnP BIOS. The options are PCI/PnP (default) and ISA.