American Megatrends MAN-758 User Manual

Page 64

MegaRUM PCI Motherboard User’s Guide

Chipset Setup,

Continued

ISA 16 Bit I/O Recovery This option specifies the length of the delay that is added to the CPU

cycle between consecutive 16-bit I/O operations. The length of the delay is
related to the CPU type and frequency. The settings are 1 Sysclock, 2
Sysclocks, 3 Sysclocks, 4 Sysclocks, or Disabled. The Optimal and Fail-Safe
default settings are Disabled.

Memory Hole

This option specifies the location of an area of memory that cannot be
addressed on the ISA bus. The settings are Disabled, 15 MB-16 MB, or
512KB-640KB. The Optimal and Fail-Safe default settings are Disabled.

Deturbo Frequency (MHz) This option specifies the deturbo frequency (in megahertz). The

deturbo frequency is a low speed used only for old software that cannot
operate at high speed. The settings are 6 MHz, 8 MHz, 12 MHz, or Disabled.
The Optimal and Fail-Safe default settings are Disabled.

USB Function

Set this option to Enabled to enable the system BIOS USB (Universal Serial
Bus) functions. The settings are Enabled or Disabled. The Optimal and Fail-
Safe default settings are Disabled.

USB Keyboard/Mouse Legacy Support Set this option to Enabled to enable USB support for

legacy keyboards and mice. The settings are Enabled or Disabled. The Optimal
and Fail-Safe default settings are Disabled.