Sony DX4 - Manual (Page 56)

AR-B1474 User¡ ¦s Guide
6-4
Internal Cache Memory
This option specifies the caching algorithm used for L1 internal cache memory. The settings are:
Setting Description
Disabled Neither L1 internal cache memory on the CPU or L2
secondary cache memory is enabled.
WriteBack Use the write-back caching algorithm.
WriteThru Use the write-through caching algorithm.
Table 6-1 Internal Cache Setting
External Cache Memory
This option specifies the caching algorithm used for L2 secondary (external) cache memory. The settings are:
Setting Description
Disabled Neither L1 internal cache memory on the CPU or L2
secondary cache memory is enabled.
WriteBack Use the write-back caching algorithm.
WriteThru Use the write-through caching algorithm.
Table 6-2 External Cache Setting
BootSector Virus Protection
When enabled, BIOS warns the user when any program attempts to write to or format the boot sector and allows
the user to intervene.
Shadow
These options control the location of the contents of the 32KB of ROM beginning at the specified memory location.
If no adapter ROM is using the named ROM area, this area is made available to the local bus. The settings are:
SETTING DESCRIPTION
Disabled The video ROM is not copied to RAM. The contents of
the video ROM cannot be read from or written to cache
memory.
Enabled The contents of C000h - C7FFFh are written to the same
address in system memory (RAM) for faster execution.
Cached The contents of the named ROM area are written to the
same address in system memory (RAM) for faster
execution, if an adapter ROM will be using the named
ROM area. Also, the contents of the RAM area can be
read from and written to cache memory.
Table 6-3 Shadow Setting
Video ROM Shadow C000, 32K
When this option is set to Enabled, the video ROM area from C000h-C7FFh is copied (shadowed) to RAM for
faster execution.
IDE Block Mode Transfer
If your hard disk supports multi-sector transfer, you can enable this option to speed the IDE transfer rate. When
Enabled, the Read/Write and From/To operations between BIOS and hard disk will be done block by block.
IDE LBA Mode
The maximum capacity of a standard IDE disk drive without LBA mode was 528MB. The LBA mode enables IDE
drive to have more than 528MB in one disk drive.