INFOMATIC POWER SYSTEMS CORPORATION 486 EISA FULL SIZE Processor 80486SX/80487SX/80486DX/80486DX2 Processor Speed 20/25/33/50/66(internal)MHz Chip Set OPTI Max. Onboard DRAM 256MB Cache 64/128/256/512KB BIOS AMI Dimensions 355mm x 304mm I/O Options None NPU Options 4167 [Image] CONNECTIONS Purpose Location Purpose Location Speaker J4 Turbo LED J7 Power LED & keylock J5 Reset switch S9 Turbo switch J6 USER CONFIGURABLE SETTINGS Function Jumper Position » External BCLK buffering 80486DX JP1 pins 1 & 2 (33/50MHz) closed External BCLK buffering JP1 pins 2 & 3 80486SX/80487SX (20/25MHz) closed » Cache bank select single JP2 pins 1 & 2 (128/512KB) closed Cache bank select double (64/256KB) JP2 pins 2 & 3 closed » Snooping/Flush 20MHz CPU JP8 Closed Snooping/Flush > 20MHz CPU JP8 Open » Monitor type select color JP9 Closed Monitor type select monochrome JP9 Open » CPU clock mode select single JP12 pins 1 & 2 frequency closed CPU clock mode select double JP12 pins 2 & 3 frequency closed DRAM CONFIGURATION Size Bank 0 Bank 1 Bank 2 Bank 3 4MB (4) 1M x 9 NONE NONE NONE 8MB (4) 1M x 9 (4) 1M x 9 NONE NONE 12MB (4) 1M x 9 (4) 1M x 9 (4) 1M x 9 NONE 16MB (4) 1M x 9 (4) 1M x 9 (4) 1M x 9 (4) 1M x 9 16MB (4) 4M x 9 NONE NONE NONE 20MB (4) 1M x 9 (4) 4M x 9 NONE NONE 24MB (4) 1M x 9 (4) 1M x 9 (4) 4M x 9 NONE 28MB (4) 1M x 9 (4) 1M x 9 (4) 4M x 9 (4) 1M x 9 32MB (4) 4M x 9 (4) 4M x 9 NONE NONE 36MB (4) 1M x 9 (4) 4M x 9 (4) 4M x 9 NONE 40MB (4) 1M x 9 (4) 1M x 9 (4) 4M x 9 (4) 4M x 9 48MB (4) 4M x 9 (4) 4M x 9 (4) 4M x 9 NONE 52MB (4) 1M x 9 (4) 4M x 9 (4) 4M x 9 (4) 4M x 9 64MB (4) 4M x 9 (4) 4M x 9 (4) 4M x 9 (4) 4M x 9 64MB (4) 16M x 9 NONE NONE NONE 128MB (4) 16M x 9 (4) 16M x 9 NONE NONE 192MB (4) 16M x 9 (4) 16M x 9 (4) 16M x 9 NONE 256MB (4) 16M x 9 (4) 16M x 9 (4) 16M x 9 (4) 16M x 9 CPU TYPE CONFIGURATION Type JP10 JP11 80486SX pins 1 & 2 & 3 & 4 pins 2 & 3 closed closed 80487SX pins 1 & 2 & 3 & 4 pins 1 & 2 closed closed 80486DX pins 2 & 3 closed Open EBC SPEED CONFIGURATION Speed JP6 JP7 20MHz Open Open 25MHz Open Open 33MHz Open Closed 40MHz Closed Open 50MHz Closed Closed CACHE CONFIGURATION Size Bank 0 Bank 1 64KB (4) 8K x 8 (4) 8K x 8 128KB (4) 32K x 8 NONE 256KB (4) 32K x 8 (4) 32K x 8 512KB (4) 128K x 8 NONE Note:In order to configure your cache for 512K, your board needs to have been specifically ordered. The difference will be that bank 1 will be made up of (4) 32 pin DIP sockets, instead of (4) 28 pin DIP sockets. CACHE TAG CHIP CONFIGURATION Size JP3 JP4 JP5 U55 U56 64KB Open Open Open (1) 8K x N/A 8 128KB Closed Open Open (1) 8K x N/A 8 256KB Closed Closed Open (1) 8K x (1) 8K 8 x 8 512KB Closed Closed Closed (1) 32K N/A x 8 CACHE DIRTY BIT CHIP CONFIGURATION Size JP16 JP17 JP18 U72 & U54 64KB open open open (2) 16K x 1 or (2) 64K x 1 128KB closed open open (2) 16K x 1 or (2) 64K x 1 256KB closed closed open (2) 16K x 1 or (2) 64K x 1 512KB closed closed closed (2) 64K x 1 CLOCK CONFIGURATION Type JP13 JP14 JP15 DS1287/1287A pins 1 & 2 pins 1 & 2 pins 1 & 2 closed closed closed DS1387/1488 pins 2 & 3 pins 2 & 3 pins 2 & 3 closed closed closed