DFI G486VPA User Manual page 29

To upgrade from 256KB to 512KB of cache memory,
use four pieces of 128Kx8 or eight pieces of 64Kx8
SRAM.
Data SRAM
Cache Size
128Kx8x8
1MB
128Kx8x4
512KB
512KB 64Kx8x8
64Kx8x4
256KB
256KB * 32Kx8x8
128KB 32Kx8x4
* Default setting
SRAM Socket
Note:
When installing the cache chips, populate Bank 0 first
and then Bank 1. For example, to configure 128K of
cache memory, install four 32Kx8 chips in Bank 0 and
leave the SRAM sockets of Bank 1 empty.
Tag SRAM Cacheable
Range
128MB
128Kx8x1 or
64Kx8x1
128MB
32Kx8x1
32Kx8x1 128MB
64MB
32Kx8x1
32Kx8x1 64MB
8Kx8x1 32MB
64KX8 or 128Kx8
8KX8 or 32Kx8
Installation Overview u 2-19
G486VPA