G486-EVB
Installation Overview
u
2-11
Cache Configuration
The G486-EVB system board can be configured to three
different cache sizes: 128KB, 256KB and 512KB.
128KB of cache memory is the default size. Either
32K x 8 (20ns) or 128K x 8 (20ns) SRAM chips are
used for cache depending on the size of cache desired.
One 8K x 8 or 32K x 8 (20ns) SRAM is needed for tag
RAM to store the cacheable addresses (refer to the table
below). The location of the SRAM sockets on the
system board is shown on the next page.
Cache Size
U18/U19/U20/U21
U23/U24/U25/U26
U22
128KB*
32K x 8 (20ns)
None
8K x 8 (20ns)
256KB
32K x 8 (20ns)
32K x 8 (20ns)
32K x 8 (20ns)
512KB
128K x 8 (20ns)
None
32K x 8 (20ns)
On: Light Green
486DX,486SX,
Intel486
TM
OverDrive
Processor, AMD 486DXL
Off: Deep Green
SL Enhanced Intel486
TM
DX, 486DX4,
Cyrix Cx486S/Cx486S2
(Default)
*
Default setting
