PEAKTRON COMPUTER, INC. 486DX-25/33, 486SX-20 Processor 80486SX/80486DX Processor Speed 20/25/33MHz Chip Set Peaktron Max. Onboard DRAM 32MB Cache None BIOS AMI Dimensions 330mm x 218mm I/O Options None NPU Options None [Image] CONNECTIONS Purpose Location Purpose Location Reset switch J1 Speaker J4 Turbo switch J2 Power LED & Keylock J5 Turbo LED J3 External battery JP4 USER CONFIGURABLE SETTINGS Function Jumper/Switch Position » Parity check enabled J6 Closed Parity check disabled J6 Open » Factory configured - do not J8 N/A alter » Monitor type select J10 Open monochrome Monitor type select color J10 Closed » CPU speed select switchable JP1 pins 1 & 2 at turbo switch closed CPU speed select forced fast JP1 pins 2 & 3 closed CPU speed select forced slow JP1 Open » Factory configured - do not JP5 N/A alter » 20/25MHz CPU using 70ns DRAM JP6 Open or33MHz CPU using 60ns 20/25MHz CPU using 60ns DRAM JP6 Closed » Shadow BIOS disabled SW1/5 Closed Shadow BIOS enabled SW1/5 Open » Bus speed select ATCLK/3 SW1/6 Open Bus speed select ATCLK/4 SW1/6 Closed Note:Location of JP6 is unverified. If using 8 bit SIMMs, J6 must be open. DRAM CONFIGURATION Size Bank 0 Bank 1 1MB (4) 256K x 9 NONE 2MB (4) 256K x 9 (4) 256K x 9 4MB (4) 1M x 9 NONE 5MB (4) 256K x 9 (4) 1M x 9 8MB (4) 1M x 9 (4) 1M x 9 16MB (4) 4M x 9 NONE 20MB (4) 1M x 9 (4) 4M x 9 32MB (4) 4M x 9 (4) 4M x 9 DRAM JUMPER CONFIGURATION Size SW1/1 SW1/2 SW1/3 SW1/4 1MB Closed Open Open Closed 2MB Open Open Open Closed 4MB Closed Closed Open Open 5MB Open Closed Open Closed 8MB Open Closed Open Open 16MB Closed Open Open Open 20MB Open Open Closed Open 32MB Open Open Open Open CPU TYPE CONFIGURATION Type JP2 JP3 80486SX pins 2 & 3 closed Open 80486DX pins 1 & 2 closed Closed BIOS CONFIGURATION Type J7 J9 27256 Open pins 1 & 2 closed 27512 Closed pins 2 & 3 closed