INTEL CORPORATION CLASSIC E EXPANDABLE DESKTOP Processor 80486SX/ODP486/80487SX/80486DX/80486DX2 Processor Speed 16/20/25/33/50(internal)/66(internal)MHz Chip Set OPTI Video Chip Set None Maximum Onboard 64MB Memory Maximum Video None Memory Cache 64/128/256KB BIOS Phoenix Dimensions 426mm x 416mm I/O Options 32-bit VESA local bus slot, floppy drive interface, IDE interface, parallel port, serial ports (2) NPU Options None [Image] CONNECTIONS Function Label Function Label Chassis fan power CN1 Serial port 2 J18 External battery CN2 Parallel port J19 Floppy drive J13 Front panel connector J25 interface IDE interface J14 32-bit VESA local bus SL1 slot Serial port 1 J16 USER CONFIGURABLE SETTINGS Setting Label Position » Flash BIOS normal boot J3 Pins 2 & 3 closed Flash BIOS recovery mode boot J3 Pins 1 & 2 closed » On board I/O enabled J4 Pins 1 & 2 closed On board I/O disabled J4 Pins 2 & 3 closed » Password normal operation J7 Pins 2 & 3 closed Password clear J7 Pins 1 & 2 closed » Parallel port direction select J9 Pins 1 & 2 output closed Parallel port direction select J9 Pins 2 & 3 input closed » Parallel port direction select J11 Pins 2 & 3 hardware for redirection closed Parallel port direction select J11 Pins 1 & 2 software hardware for redirection closed » Battery type select 3.6v/4.5v J17 Pins 2 & 3 closed Battery type select 6v J17 Pins 1 & 2 closed » CMOS memory normal operation J25 pins 17 Closed & 18 CMOS memory clear J25 pins 17 Open & 18 » Fan enabled J29 Pins 2 & 3 closed Fan disabled J29 Pins 1 & 2 closed » 12v flash BIOS enabled J30 Pins 1 & 2 closed 12v flash BIOS disabled J30 Pins 2 & 3 closed » Local bus ready select delayed J31 Pins 1 & 2 closed Local bus ready select normal J31 Pins 2 & 3 operation closed DRAM CONFIGURATION Size Bank 0 Bank 1 Bank 2 Bank 3 1MB (1) 256K x None None None 36 2MB (1) 256K x (1) 256K x None None 36 36 3MB (1) 256K x (1) 256K x (1) 256K x None 36 36 36 4MB (1) 1M x 36 None None None 4MB (1) 256K x (1) 256K x (1) 256K x (1) 256K x 36 36 36 36 5MB (1) 1M x 36 (1) 256K x None None 36 5MB (1) 256K x (1) 1M x 36 None None 36 6MB (1) 1M x 36 (1) 256K x (1) 256K x None 36 36 7MB (1) 1M x 36 (1) 256K x (1) 256K x (1) 256K x 36 36 36 8MB (1) 1M x 36 (1) 1M x 36 None None 9MB (1) 256K x (1) 1M x 36 (1) 1M x 36 None 36 DRAM CONFIGURATION (CON’T) Size Bank 0 Bank 1 Bank 2 Bank 3 12MB (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 None 13MB (1) 256K x (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 36 16MB (1) 4M x 36 None None None 16MB (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 17MB (1) 4M x 36 (1) 256K x None None 36 17MB (1) 256K x (1) 4M x 36 None None 36 18MB (1) 4M x 36 (1) 256K x (1) 256K x None 36 36 19MB (1) 4M x 36 (1) 256K x (1) 256K x (1) 256K x 36 36 36 20MB (1) 4M x 36 (1) 1M x 36 None None 20MB (1) 1M x 36 (1) 4M x 36 None None 24MB (1) 4M x 36 (1) 1M x 36 (1) 1M x 36 None 28MB (1) 4M x 36 (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 32MB (1) 4M x 36 (1) 4M x 36 None None 33MB (1) 256K x (1) 4M x 36 (1) 4M x 36 None 36 36MB (1) 1M x 36 (1) 4M x 36 (1) 4M x 36 None 48MB (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 None 49MB (1) 256K x (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 36 52MB (1) 1M x 36 (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 64MB (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 Note: The orientation of the banks is unidentified. 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 Note: The chip sizes of the TAG and DIRTY bit are unidentified. CACHE JUMPER CONFIGURATION Size J34 None Open 64KB Open 128KB Pins 1 & 2, 5 & 6 closed 256KB Pins 1 & 2, 3 & 4, 7 & 8 closed CPU SPEED SELECTION Speed J5 J6 16MHz Pins 1 & 2 closed Pins 1 & 2 closed 20MHz Pins 2 & 3 closed Pins 1 & 2 closed 25MHz Pins 1 & 2 closed Pins 2 & 3 closed 33MHz Pins 2 & 3 closed Pins 2 & 3 closed 50iMHz Pins 1 & 2 closed Pins 2 & 3 closed 66iMHz Pins 2 & 3 closed Pins 2 & 3 closed CPU TYPE SELECTION Type J32 J33 80486SX Pins 3 & 4 closed Pins 4 & 6 closed 80487SX Pins 1 & 2, 5 & 6 Pins 1 & 3, 2 & 4 closed closed ODP486 Pins 1 & 2, 5 & 6 Pins 1 & 3, 2 & 4 closed closed 80486DX Pins 1 & 2, 5 & 6 Pins 3 & 5, 4 & 6 closed closed 80486DX2 Pins 1 & 2, 5 & 6 Pins 3 & 5, 4 & 6 closed closed MISCELLANEOUS TECHNICAL NOTE The location of pin 1 on all jumpers is unidentified.