BIOSTAR MICROTECH INTERNATIONAL CORPORATION MB-1420/1425/1433PB REV. A MB-1420/1425/1433PV REV. A Processor 80486SX/80487SX/P23T/80486DX/80486DX2 Processor Speed 20/25/33/50(internal)/50/66(internal)MHz Chip Set Unidentified Max. Onboard DRAM32MB Cache None BIOS AMI Dimensions 254mm x 218mm I/O Options None NPU Options 4167 [Image] CONNECTIONS Purpose Location Purpose Location Power LED & keylock J1 Turbo switch JP6 Speaker J2 External battery JP8 Turbo LED J3 Reset switch SW1 USER CONFIGURABLE SETTINGS Function Jumper Position » Monitor type select color JP5 Closed Monitor type select monochrome JP5 Open » CMOS memory normal operation JP7 pins 2 & 3 closed CMOS memory clear JP7 pins 1 & 2 closed 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) 1M x 9 (4) 256K x 9 8MB (4) 1M x 9 (4) 1M x 9 16MB (4) 4M x 9 NONE 32MB (4) 4M x 9 (4) 4M x 9 CPU TYPE CONFIGURATION Type JP9 JP10 JP11 JP12 80486SX (PQFP) Open Open Closed Open 80486SX (PGA) Open Open 2 & 3 Open 80487SX 2 & 3 1 & 2 Closed Open 80486SX (PQFP) & 2 & 3 1 & 2 Closed 1 & 2 80487SX 80486SX (PQFP) & P23T 2 & 3 1 & 2 Closed 2 & 3 80486SX (PQFP) & 1 & 2 1 & 2 Closed 2 & 3 80486DX/DX2 80486DX 1 & 2 1 & 2 Closed Open 80486DX2 1 & 2 1 & 2 Closed Open Note: Pins designated should be in the closed position. KEYBOARD BIOS CONFIGURATION Type JP1 JP2 JP3 JP4 8042 (23 Closed Open Open Open pins) 8042 (24 Open Closed Open Open pins) 8042 (27 Open Open Closed Open pins) 8042 (30 Open Open Open Closed pins)