Epson ActionTower 3000 User Manual - Page 64

Installing External Cache You can install 64KB, 128KB, or 256KB of external cache on your system. To install 64KB of external cache, use eight SRAM, 28-pin, 8K x 8,20ns DIP chips, and one 8K x 8,201ns tag chip To install 128KB of external cache, use four SRAM, 28-pin, 32K x 8,20ns DIP chips, and one 8K x 8,20ns tag chip To install 256KB of external cache, use eight SRAM, 28-pin, 32K x 8,20ns DIP chips, and one 32K x 8,20ns tag chip. The table below lists the cache SRAM DIP chips that are approved for use in your computer. Cache SRAM DIP chip types Manufacturer UMC (8K x 8) Cypress (8K x 8) Toshiba (32K x 8) UMC (32K x 8) Winbond (32K x 8) Part number UMC164K-20 CY78165-15 TC5532K-20 UM61256AK-15/20 W24257AK-15 Manufacturer samsung (32K x 8) Paradigm (32K x 8) Micron (32K x 8) NKK (32K x 8) I Aster (tag) Part number KM68257BP-15/20 PDM1256S-20 MT502568-20 N341256P-20 AA88128AK-20 For the cache memory to work properly, you must install chips in the following configuration (each bank contains four cache memory sockets): Cache memory configurations Bank 0 U23 - U26 Bank1 U30 - U33 8Kx8 32Kx8 8Kx8 - 32Kx8 32Kx8 Tag SRAM U34 8Kx8 8Kx8 32Kx8 Total cache 64KB 128KB 256KB Installing and Removing options 3-21