Intermec 6640 Guida Di Riferimento

SECTION 2

BIOS Setup

2-6

6640/6650 Windows 2000 Technical Reference

DMA channel (Active if Mode is set to IrDA):

Sets the Direct Memory Access (DMA) channel for the Fast IR of the in-

frared port. Values include: DMA 0, DMA 1, or DMA 3 (default).

DMA allows for a device to transfer large amounts of data to RAM direct-

ly without CPU intervention.

LPT Port:

Enables (default) or disables the use of the printer and parallel floppy port.

Mode:

Sets the mode of the LPT port — Output only, Bidirectional (default),

EPP, or ECP.

Bidirectional (PS/2)

A standard interface for communicating between the PC and attached

devices using the PS/2 mode.
Enhanced Parallel (EPP)

A parallel port standard for PCs that supports bidirectional commu-

nications. EPP is good for links that change directions frequently,

such as drives.
Extended Capabilities (ECP)

A parallel port standard for computers similar to the EPP. ECP is

good for transferring large data blocks quickly, such as printers.

Note EPP and ECP are about ten times faster than the older Centronics standard.

NOTE:

When the external floppy is attached, this port mode is ignored. However, the port itself must
be enabled. Once the floppy drive is removed, the port mode is reset.

Base I/O address:

(Read-Only) The base I/O address is set to “378/IRQ7” for the LPT port

and is not modifiable.

Press the [Esc] key or tap the “Exit Submenu” item to return to the “Ad-

vanced” menu.