Tyan Computer Trinity 371 Motherboard User Manual

S1857  Trinity 371

This field is effective only in systems with two floppy drives. Selecting

Enabled assigns physical drive B to logical drive A, and physical drive A to

logical drive B.

When Enabled, the BIOS tests (seeks) floppy drives to determine whether they

have 40 or 80 tracks. Only 360-KB floppy drives have 40 tracks; drives with 720

KB, 1.2 MB, and 1.44 MB capacity all have 80 tracks. Because very few modern

PCs have 40-track floppy drives, we recommend that you set this field to

Disabled to save time.

Toggle between On or Off to control the state of the NumLock key when the

system boots. When toggled On, the numeric keypad generates numbers

instead of controlling cursor operations.

Enables multi-sector transfers from the IDE drive in PIO mode.

Gate A20 refers to the way the system addresses memory above 1 MB

(extended memory). When set to Fast, the system chipset controls Gate A20.

When set to Normal, a pin in the keyboard controller controls Gate A20.

Setting Gate A20 to Fast improves system speed, particularly with OS/2 and

Windows.

Select Enabled or Disabled. If Enabled, allows memory checking when the

BIOS detects the presence of ECC or Parity DRAM.

When Disabled, the following two items (Typematic Rate and Typematic

Delay) are irrelevant. Keystrokes repeat at a rate determined by the keyboard

controller in your system. When Enabled, you can select a typematic rate and

typematic delay.

When the typematic rate setting is enabled, you can select a typematic rate

(the rate at which character repeats when you hold down a key) of 6, 8, 10,12,

15, 20, 24 or 30 characters per second.