ORCHID TECHNOLOGY SUPERBOARD 486/VLB (Rev. C) Processor 80486SX/80487SX/80486DX/ODP486SX/80486DX2 Processor Speed 20/25/33/50(internal)/50/66(internal)MHz Chip Set EFAR Max. Onboard DRAM32MB SRAM Cache 128/256KB BIOS AMI Dimensions 254mm x 218mm I/O Options 32-bit VESA local bus slots (2) NPU Options None [Image] CONNECTIONS Purpose Location Purpose Location Turbo LED JP3 Reset switch JP9 Speaker JP7 Turbo switch JP10 Power LED & keylock JP8 32-bit Vesa local S1 & S2 bus slots USER CONFIGURABLE SETTINGS Function Jumper Position » Factory configured - do not alter JP11 Open » Monitor type select color JP26 Open Monitor type select monochrome JP27 Closed » Factory configured - do not alter JP27 pins 2 & 3 closed » Factory configured - do not alter JP28 pins 2 & 3 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 8MB (4) 1M x 9 (4) 1M x 9 16MB (4) 4M x 9 NONE 32MB (4) 4M x 9 (4) 4M x 9 CACHE CONFIGURATION Size Cache Location TAG 128KB (4) 32K x 8 Bank 0 (1) 32K x 8 256KB (8) 32K x 8 Banks 0 & 1 (1) 32K x 8 CACHE JUMPER CONFIGURATION Size JP14 JP16 JP22 128KB pins 2 & 3 Open pins 2 & 3 closed closed 256KB pins 1 & 2 Closed pins 1 & 2 closed closed VESA CPU TYPE (ID0 & ID1) CONFIGURATION CPU Type JP1 (ID0) JP2 (ID1) 80386 pins 2 & 3 closed pins 1 & 2 closed 80486 pins 1 & 2 closed pins 2 & 3 closed VESA WAIT STATE (ID2) CONFIGURATION Wait states CPU speed JP4 (ID2) 0 wait states £ 33MHz pins 1 & 2 closed 1 wait state > 33MHz pins 2 & 3 closed VESA BUS SPEED (ID3) CONFIGURATION CPU speed JP5 (ID3) £ 33MHz pins 1 & 2 closed > 33MHz pins 2 & 3 closed VESA ID4 CONFIGURATION Setting JP6 (ID4) Reserved for future use pins 2 & 3 closed CPU TYPE CONFIGURATION Type Speed OSC JP12 JP13 JP18 JP19 80486SX 20MHz 20MHz pins 2 Open Open pins 2 & 3 & 3 80486SX 20MHz 40MHz pins 2 Open Open pins 1 & 3 & 2 80486SX 25MHz 25MHz pins 2 Open Open pins 2 & 3 & 3 80486SX 25MHz 50MHz pins 2 Open Open pins 1 & 3 & 2 80487SX 25MHz 25MHz pins 1 Closed pins 2 pins 2 & 2 & 3 & 3 80487SX 25MHz 50MHz pins 1 Closed pins 2 pins 1 & 2 & 3 & 2 80487SX 33MHz 66MHz pins 1 Closed pins 2 pins 1 & 2 & 3 & 2 80486DX 25MHz 25MHz pins 1 Closed pins 2 pins 2 & 2 & 3 & 3 80486DX 25MHz 50MHz pins 1 Closed pins 2 pins 1 & 2 & 3 & 2 80486DX 33MHz 66MHz pins 1 Closed pins 2 pins 1 & 2 & 3 & 2 80486DX 50MHz 50MHz pins 1 Closed pins 2 pins 2 & 2 & 3 & 3 ODP486SX 50MHz 25MHz pins 2 Open Open pins 2 & 3 & 3 ODP486SX 50iMHz 50MHz pins 2 Open Open pins 1 & 3 & 2 80486DX2 50iMHz 50MHz pins 1 Closed pins 2 pins 1 & 2 & 3 & 2 80486DX2 66iMHz 66MHz pins 1 Closed pins 2 pins 1 & 2 & 3 & 2 Notes: Pins designated should be in the closed position.