Technical information

3/10 LS PRO OWNER'S HANDBOOK
Using the BIOS Setup utility
Chapter 3
Parallel Port
These three options allow you to set the mode of the parallel
port.
Option Description
Standard Standard IBM AT-compatible bi-
directional “Centronics” mode.
EPP Compatible Compatible with the Enhanced Parallel
Port standard.
ECP Compatible Compatible with the Microsoft/
Hewlett Packard Extended Capabilities
Port standard.
Disable
These check boxes allow you to disable various motherboard
features or components. Obviously, you should not do this unless
you are certain you will not need those features or components.
In particular, there is normally no reason to disable the internal
or external memory cache, as doing so severely degrades the
computer’s performance. Some old software which is speed
sensitive may not work with caching enabled, but this is very
unlikely nowadays.
However, you might want to disable some features for security
reasons. For example, disabling the ability to boot from the
diskette drive can help prevent the introduction of computer
viruses into the system.
Occasionally, you may need to disable motherboard
components to free system resources for use by PCMCIA cards
(although in general the BIOS’s support for Plug and Play
PCMCIA should make this unnecessary).
More information about the computer’s use of interrupts, DMA
channels, memory and I/O ports is given in Appendix B,
“Technical Information”.