Product overview
MAE466 features
On-board
memory
Memory cache
Shadow RAM
Nonvolatile RAM
Math
coprocessor
The MAE486 provides two SIMM memory
banks. Each bank provides four SIMM sockets,
which can accommodate standard,
single
in-line memory modules
memory configurations using combinations
and
DRAM
modules
Megabytes.
For added performance in multitasking environ-
ments, the MAE486 provides 128KB of
back cache in addition to the
internal cache
of the 80486.
Shadow RAM provides much faster RAM access
to the information normally stored in ROM. The
MAE486 supports shadow RAM for both system
BIOS and video BIOS.
Of the total system memory installed, 128KB is
reserved for shadow RAM purposes, regardless
of whether this feature is used. For
and 4MB configurations, the total amount
memory available to the user will be the
amount of memory installed minus 128KB. For
configurations of 8MB and above, the total
amount of memory available will be the actual
amount of memory installed minus 384KB.
The SETUP utility provided by the BIOS has two
entries that can be used to enable this feature.
(For more information, refer to the manual for
the BIOS installed in the system.)
This memory is programmed by the EISA config-
uration utility and is used by the EISA Power On
Self Test (POST) routine of the BIOS. If the
configuration memory has not been pro-
grammed, the POST routine will indicate an
error. This is correct operation and does not indi-
cate a board defect.
A socket is available for the Weitek 4167 math
coprocessor
(untested as of
l - 2
Installation and Operation Guide
