IBM 2194, 6345, 2193 manual USB Setup, IDE drives setup

USB Setup

Use the settings for in this menu item to enable or disable the Universal Serial Bus (USB) functions.

USB Controller

Select enabled if you will be using USB devices.

USB Keyboard Support

Select enabled to use a USB keyboard. The USB Controller must also be set to enabled. Select disabled to use a keyboard that connects to the standard keyboard connector.

IDE drives setup

PIO (Programmed Input/Output)

Each IDE drive controller can support up to two separate drives. IDE drives have a master/slave relationship which are determined by the cabling configuration used to attach them to the controller. Your system supports two IDE controllers, a primary and a secondary, so you have the ability to install up to four separate IDE drives.

PIO means Programmed Input/Output. Rather than have the BIOS issue a series of commands to control a transfer to or from the disk drive, PIO allows the BIOS to tell the controller what it wants and then lets the controller and the processor perform the complete task by themselves. PIO provides increased efficiency.

Your system supports five modes, numbered from 0 to 4, which primarily differ in timing. When Auto (default) is selected, the BIOS selects the best available mode for the following four setup items:

•IDE Primary Master PIO

•IDE Primary Slave PIO

•IDE Secondary Master PIO

•IDE Secondary Slave PIO

6-10IBM Personal Computer User Guide