SMC Networks 486DX4 - Manual (Page 69)

AR-B1462 User¡ ¦s Guide
7-5
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 7-3 Shadow Setting