Tyan Computer TYAN S1472 ATX - Manual (Page 17)

17 S1472-001-01 http://www.tyan.com
3.12 Upgrading Cache Memory
The S1472 has 256Kb of on-board pipelined burst SRAM and
can be upgraded to 512Kb by adding a Tyan approved 256Kb
cache module. Please refer to your vendor for the approved
upgrade modules.
wRefer to page 9 for the cache jumper settings.
wWhen upgrading to 512Kb cache, you must use a 256Kb "COAST"
module and open jumper J8 and put jumper J7 on pins 1-2
wOnly use Tyan approved 256Kb "COAST" modules when upgrading.
wThe "COAST Module" will only fit in the "Coast Socket" one way and
should install easily.
w wYou cannot disable the onboard cache and install a 512Kb "COAST"
module to get 512Kb of cache. The onboard cache is always used.