INFORMTECH INTERNATIONAL, INC. IT486EX VER. 1 Processor 80486SX/80486DX Processor Speed 25/33MHz Chip Set Intel Max. Onboard DRAM 64MB Cache 64/128KB (with external cache card) BIOS Phoenix Dimensions 330mm x 218mm I/O Options None NPU Options 4167 [Image] CONNECTIONS Purpose Location Purpose Location Turbo switch P1 Reset switch P4 Turbo LED P2 Power LED & keylock P5 Speaker P3 External battery P20 USER CONFIGURABLE SETTINGS Function Jumper/Switch Position » Cache write protect disabled J5 Closed Cache write protect enabled J5 Open » On board DRAM access enabled J8 Closed On board DRAM access disabled J8 Open » I/O recovery time select J16 Closed 8-bit = 11BLCK, 16-bit = 3BLCK No recovery time J16 Open » 80486 internal cache enabled J17 Closed 80486 internal cache disabled J17 Open » Turbocache486 enabled J20 Closed Turbocache486 disabled J20 Open » BIOS duplicated (to 00FF0000 J36 Closed hex) BIOS not duplicated J36 Open » Turbo mode enabled P1 Open Turbo mode disabled P1 Closed » Factory configured - do not SW1/7 Off alter » Monitor type select SW1/8 Off monochrome Monitor type select color SW1/8 On DRAM CONFIGURATION Size Bank 0 Bank 1 Bank 2 Bank 3 2MB (4) 256K x 9 (4) 256K x 9 NONE NONE 4MB (4) 256K x 9 (4) 256K x 9 (4) 256K x 9 (4) 256K x 9 8MB (4) 1M x 9 (4) 1M x 9 NONE NONE 10MB (4) 256K x 9 (4) 256K x 9 (4) 1M x 9 (4) 1M x 9 10MB (4) 1M x 9 (4) 1M x 9 (4) 256K x 9 (4) 256K x 9 16MB (4) 1M x 9 (4) 1M x 9 (4) 1M x 9 (4) 1M x 9 32MB (4) 4M x 9 (4) 4M x 9 NONE NONE 34MB (4) 4M x 9 (4) 4M x 9 (4) 256K x 9 (4) 256K x 9 34MB (4) 256K x 9 (4) 256K x 9 (4) 4M x 9 (4) 4M x 9 40MB (4) 4M x 9 (4) 4M x 9 (4) 1M x 9 (4) 1M x 9 40MB (4) 1M x 9 (4) 1M 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 MEMORY BANK CONFIGURATION (BANK 0 & 1) SIMM Type SW1/1 SW1/2 No memory installed Off Off 256KB On Off 1MB Off On 4MB On On MEMORY BANK CONFIGURATION (BANK 2 & 3) SIMM Type SW1/3 SW1/4 No memory installed Off Off 256KB On Off 1MB Off On 4MB On On MEMORY SPEED/CPU MHZ CONFIGURATION (25MHZ) SIMM Type SW1/5 SW1/6 256KB Off Off 1MB On On 4MB On On Note: SW1/5 corresponds to Banks 0 & 1 and SW1/6 corresponds to Banks 2 & 3. MEMORY SPEED/CPU MHZ CONFIGURATION (33MHZ) SIMM Type SW1/5 SW1/6 256KB Off Off 1MB On On 4MB Off Off Note: SW1/5 corresponds to Banks 0 & 1 and SW1/6 corresponds to Banks 2 & 3. TURBOCACHE486 CONFIGURATION Module J17 J18 J19 82485ES Open Open Open 82485MA/MB Closed Closed Closed TURBOCACHE486 JUMPER CONFIGURATION Module J1 J2 J29 J63 82485ES Open Open Open Open 82485MA/MB Closed Closed Closed Closed CPU SPEED CONFIGURATION Speed J3 J15 25MHz pins 2 & 3 closed Closed 33MHz pins 1 & 2 closed Open BATTERY TYPE CONFIGURATION Battery type J64 4.5V (without internal current pins 3 & 4 closed limiting resistor) 3.6V-4.5V (with internal current pins 1 & 3 closed limiting resistor) 6V (without internal current pins 2 & 4 closed limiting resistor) 6V (with internal current limiting pins 1 & 2 closed resistor) BIOS CONTROL CONFIGURATION ROM type J25 J35 28F512 Closed Closed 28F010 Closed Open 27C512 Open Closed 27C010 Open Open