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Chapter 7: AMIBIOS
7-23
BIOS
C000, 16k Shadow
C400, 16k Shadow
C800, 16k Shadow
CC00, 16k Shadow
D000, 16k Shadow
D400, 16k Shadow
D800, 16k Shadow
DC00, 16k Shadow
These options specify how the 16 KB of video ROM at each of the above
addresses is treated. The settings are Disabled, Enabled, and Cached/WP
. When Disabled, the contents of the video ROM are not copied to RAM.
When Enabled, the contents of 16 KB of video ROM beginning at the above
address are copied (shadowed) from ROM to RAM for faster application.
When set to Cached/WP, the contents of 16 KB of video ROM beginning at
the above address are copied (shadowed) from ROM to RAM and can be
written to or read from cache memory. The settings for this option are
Disabled, Enabled and Cached/WP. (The optimal settings are Cached/WP
for C000 and C400 and Disabled for all the other settings.