CSS LABORATORIES, INC. PREFERRED 486 GA/VL ESP Processor 80486SX/80487SX/80486DX/80486DX2/Pentium Overdrive Processor Speed 25/33/50(internal)50/66(internal)/66MHz Chip Set OPTI Max. Onboard DRAM32/64MB Cache 64/256/512KB BIOS AMI Dimensions 330mm x 218mm I/O Options 32-bit VESA local bus slots (2) NPU Options None [Image] CONNECTIONS Purpose Location Purpose Location Front panel connector J39 Power LED & keylock JP55 IDE interface LED J40 Turbo switch JP101 Turbo LED/reset J41 Video to green P1 switch connector Speaker JP1 32-bit VESA Local bus SL1 & SL2 slots USER CONFIGURABLE SETTINGS Function Jumper/Switch Position » Green PC password enabled J57 Open Green PC password disabled J57 Closed » VESA bus clock select CPU JP7 Closed speed & 1 clock VESA bus clock select CPU JP7 Open speed » Cache burst mode select JP9 Open 2-1-1-1 Cache burst mode select JP9 Closed 3-2-2-2 » CPU type select JP11 Pins 2 & 3 DX/DX2/Overdrive closed CPU type select Overdrive JP11 Pins 1 & 2 closed » CPU type select non SX CPU JP14 Open CPU type select SX CPU JP14 Pins 2 & 3 closed » Video card address select JP47 Open C000h-C7FFh disabled Video card address select JP47 Closed C000h-C7FFh enabled » Flash BIOS enabled JP52 Pins 1 & 2 closed Flash BIOS disabled JP52 Pins 2 & 3 closed » Monitor type select color JP56 Closed Monitor type select monochrome JP56 Open » Keyboard synchronous with CPU JP70 Pins 2 & 3 closed Engineer test setting JP70 Pins 1 & 2 closed » Factory configured - do not SW1/7 Off alter. » Factory configured - do not SW1/8 Off alter DRAM CONFIGURATION (30PIN) Size Bank 0 Bank 1 4MB (4) 1M x 9 NONE 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 Note: This board was manufactured with either 8 banks of 30 pin SIMM sockets or 4 banks of 72 pin SIMM sockets. Mainboard drawing depicts 72 pin SIMM sockets. If mainboard has 30 pin SIMM sockets, use the above table. DRAM CONFIGURATION (72 PIN) Size Bank 0 Bank 1 Bank 2 Bank 3 2MB (1) 512K x NONE NONE NONE 36 4MB (1) 512K x (1) 512K x NONE NONE 36 36 4MB (1) 1M x 36 NONE NONE NONE 6MB (1) 512K x (1) 1M x 36 NONE NONE 36 8MB (1) 1M x 36 (1) 1M x 36 NONE NONE 8MB (1) 2M x 36 NONE NONE NONE 10MB (1) 512K x (1) 2M x 36 NONE NONE 36 12MB (1) 1M x 36 (1) 2M x 36 NONE NONE 12MB (1) 512K x (1) 512K x (1) 2M x 36 NONE 36 36 14MB (1) 512K x (1) 1M x 36 (1) 2M x 36 NONE 36 16MB (1) 2M x 36 (1) 2M x 36 NONE NONE 16MB (1) 4M x 36 NONE NONE NONE 16MB (1) 1M x 36 (1) 1M x 36 (1) 2M x 36 NONE 18MB (1) 512K x (1) 2M x 36 (1) 2M x 36 NONE 36 20MB (1) 512K x (1) 512K x (1) 2M x 36 (1) 2M x 36 36 36 20MB (1) 1M x 36 (1) 2M x 36 (1) 2M x 36 NONE 22MB (1) 512K x (1) 1M x 36 (1) 2M x 36 (1) 2M x 36 36 24MB (1) 1M x 36 (1) 1M x 36 (1) 2M x 36 (1) 2M x 36 24MB (1) 2M x 36 (1) 2M x 36 (1) 2M x 36 NONE 24MB (1) 1M x 36 (1) 1M x 36 (1) 4M x 36 NONE 26MB (1) 512K x (1) 2M x 36 (1) 2M x 36 (1) 2M x 36 36 28MB (1) 1M x 36 (1) 2M x 36 (1) 2M x 36 (1) 2M x 36 32MB (1) 4M x 36 (1) 4M x 36 NONE NONE 32MB (1) 8M x 36 NONE NONE NONE 32MB (1) 2M x 36 (1) 2M x 36 (1) 2M x 36 (1) 2M x 36 32MB (1) 2M x 36 (1) 2M x 36 (1) 4M x 36 NONE 40MB (1) 1M x 36 (1) 1M x 36 (1) 4M x 36 (1) 4M x 36 48MB (1) 2M x 36 (1) 2M x 36 (1) 4M x 36 (1) 4M x 36 48MB (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 NONE 64MB (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 64MB (1) 4M x 36 (1) 4M x 36 (1) 8M x 36 NONE Note: This board was manufactured with either 8 banks of 30 pin SIMM sockets or 4 banks of 72 pin SIMM sockets. Mainboard drawing depicts 72 pin SIMM sockets. If mainboard has 72 pin SIMM sockets, use the above table. CACHE CONFIGURATION Size Bank 0 Bank 1 TAG 64KB (4) 8K x 8 (4) 8K x 8 (1) 8K x 8 256KB (4) 32K x 8 (4) 32K x 8 (1) 32K x 8 512KB (4) 128K x 8 NONE (1) 32K x 8 CACHE JUMPER CONFIGURATION Size JP20 JP21 JP27 JP28 JP29 JP35 JP36 JP38 JP40 64KB 1 & 1 & 1 & 1 & 2 & 2 & 2 & 1 & 2 & 3 2 2 2 2 3 3 3 2 256KB 1 & 2 & 2 & 2 & 2 & 2 & 2 & 1 & 2 & 3 2 3 3 3 3 3 3 2 512KB 2 & 2 & 2 & 2 & 1 & 1 & 1 & 2 & 1 & 2 3 3 3 3 2 2 2 3 Note: Pins designated should be in the closed position. CPU TYPE CONFIGURATION Type JP15 JP16 JP17 80486SX Open Pins 2 & 3 Open closed 80486DX Closed Pins 1 & 2 Closed closed OVERDRIVE/80486SX CONFIGURATION Type JP12 » Both sockets enabled Open 80486SX disabled Pins 1 & 2 closed Overdrive disabled Pins 2 & 3 closed CPU SPEED CONFIGURATION Speed JP8 JP19 JP50 25MHz Closed Pins 1 & 2 N/A closed 33MHz Closed Pins 1 & 2 N/A closed 50iMHz Open Pins 2 & 3 N/A closed 50MHz N/A N/A Closed 66iMHz Open Pins 2 & 3 N/A closed 66MHz N/A N/A Open VESA SYSTEM SPEED CONFIGURATION CPU speed JP4 < 33MHz Open >= 33MHz Closed VESA WAIT STATE Setting JP5 JP6 JP10 0 wait states Open Open Open 1 wait state Closed Closed Closed GREEN PC IRQ DETECTION IRQ SW1/1 SW1/2 SW1/3 SW1/4 SW1/5 SW1/6 IRQ3 Off Off On Off Off Off IRQ4 Off Off Off Off On Off IRQ6 Off Off Off Off Off On IRQ10 On Off Off Off Off Off IRQ11 Off On Off Off Off Off IRQ14 Off Off Off On Off Off IRQ CONFIGURATION IRQ SJ1 SJ2 » IRQ5 & IRQ7 Pins 1 & 2 closed Pins 1 & 2 closed IRQ12 & IRQ15 Pins 2 & 3 closed Pins 2 & 3 closed EXTENDED READY SIGNAL CONFIGURATION CPU Speed JP3 JP45 > 33mhz (RDY1) Pins 2 & 3 closed Closed < 25mhz (RDY2) Pins 1 & 2 closed Open FRONT PANEL PIN OUT CONFIGURATION Pin Assignment 1 Ground 2 Power LED 3 Hard drive LED 4 Not used 5 Power 6 Ground 7 Turbo LED 8 Keyboard inhibit 9 Power 10 Reset switch