Asus P5-99B User Manual download pdf (Page 55)

ASUS P5-99B User’s Manual 55

IV. BIOS SETUP

Chipset Features

IV. BIOS SETUP

Chipset Features

Graphics Aperture Size (64MB)

Memory-mapped, graphics data structures can reside in a Graphics Aperture. Leave

on default setting.

Memory Hole At Address (None)

This allows you to specify the memory address space to be reserved for ISA expan-

sion cards that specifically require this setting. Setting the address space to a par-

ticular setting (available settings: 15M-16M, 14M-16M, 12M-16M) will make that

memory space unavailable to the system. Expansion cards can only access memory

up to 16M. The default is None.

Delayed Transaction (Enabled)

If Enabled, this frees the PCI Bus during CPU accessing of 8-bit ISA cards that

normally consume about 50-60 PCI Clocks without PCI delayed transaction. If PCI

Bus Masters cannot use the PCI Bus, leave this on the default setting of Disabled for

some ISA cards that are not PCI 2.1 compliant.

VGA Shared Memory Size (4MB)

This allows you to specify the memory size (available settings: 2MB, 4MB, 8MB) to

be shared with the onboard VGA controller. Default setting is 4MB.

....................................................................................................................................

Onboard FDC Controller (Enabled)

When enabled, this field allows you to connect your floppy disk drives to the onboard

floppy drive connector instead of a separate controller card. If you want to use a differ-

ent controller card to connect the floppy disk drives, set this field to Disabled.

Onboard FDC Swap A & B (No Swap)

This field allows you to reverse the hardware drive letter assignments of your floppy

disk drives. Two options are available: Swap AB and No Swap (default). If you want

to switch drive letter assignments, set this field to Swap AB, and the swap will be

controlled by the onboard chipset.

Onboard Serial Port 1 (3F8H/IRQ4)

Settings are 3F8H/IRQ4, 2F8H/IRQ3, 3E8H/IRQ4, 2E8H/IRQ10, and Disabled for

the onboard serial connector.

Onboard Serial Port 2 (2F8H/IRQ3)

Settings are 3F8H/IRQ4, 2F8H/IRQ3, 3E8H/IRQ4, 2E8H/IRQ10, and Disabled for

the onboard serial connector.

Onboard Parallel Port (378H/IRQ7)

This field sets the address of the onboard parallel port connector. You can select either

3BCH / IRQ 7, 378H / IRQ 7, 278H / IRQ 5, or Disabled. If you install an I/O card with

a parallel port, ensure that there is no conflict in the address assignments. The PC can

support up to three parallel ports as long as there are no conflicts for each port.

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Asus P5-99B User Manual Page 55

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