American Megatrends MAN-759 manual Chipset Setup

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.

48Pegasus PCI Motherboard User’s Guide