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SETUP
For drives with capacities less than 500 Mbytes Extended
CHS functions identically to Standard CHS. Some non-DOS
operating systems may require this option to be set to
Standard CHS for drives of greater than 500 Mbytes.
Read-ahead
Many IDE hard disk drives incorporate a read-ahead buffer.
This option allows you to disable the buffer.
The default setting is Enabled, and this offers a performance
advantage. If you use old, speed sensitive, software you may
find that it requires the read-ahead buffer to be Disabled.
ISA Legacy Resources
When you install an ISA adapter in your system you should
use the ISA Legacy Resources menu to register the resources
that the adapter card uses.
The system cannot detect the resources used by ISA cards.
Unless you use this menu to declare resources used by ISA
cards, the system cannot auto-configure PCI cards to avoid
clashes, and Plug and Play (PnP) cannot correctly configure
your system.
If you find the terminology in the descriptions that follow
confusing, refer to Appendix A of this manual.
The resources affected are: memory, I/O ports, DMA channels
and interrupts. Each type of resource has an independent
menu. These menus allow you to define, in detail, which
resources are used by ISA adapter cards.
Some resources are shown as Allocated by the system.
These, are shown for your information, and resources used
on the motherboard are not exhaustively listed. For detailed
information refer to Appendix A of this manual.
XEN OWNER'S HANDBOOK 4/17
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