FORCOM TECHNOLOGY CORPORATION 419 Processor 80486SX/CX486S/80487SX/CX486S2/80486DX/Am486DX/CX486DX/ODP486SX/80486DX2/Am468DX2/Cx486DX2/80486DX4/Pentium Overdrive Processor 20/25/33/40/50/50(internal)/66i/75i/100iMHz Speed Chip Set OPTI Max. 128MB Onboard DRAM Cache 64/128/256/512KB BIOS AMI Dimensions 220mm x 260mm I/O 32-bit VESA local bus slots (3), Green PC feature Options NPU None Options [Image] CONNECTIONS Purpose Location Purpose Location External battery J1 Green monitor power JP63 supply Power LED & JP2 External power JP68 keylock management interface Turbo LED JP16 Reset switch S1 Turbo switch JP17 32-bit VESA Local bus SL1,SL2,SL3 slots Speaker JP18 USER CONFIGURABLE SETTINGS Function Jumper Position » Monitor type select color JP30 Closed Monitor type select monochrome JP30 Open » Normal CPU ADS# operation JP36 pins 2 & 3 Delay CPU ADS# clock operation JP36 pins 1 & 2 » Power to CPU set at 5V JP64 pins 1 & 3, 2 & 4 Power to CPU set at 3.3V (for JP64 pins 4 & 6, 3 & Intel DX4 CPU) 5 Set CPU external operation clock JP65 Open to 3X Set CPU external operation clock JP65 Closed to 2X Cache size enabled 64KB or 256KB JP67 Closed Cache size enabled 128KB or JP67 Open 512KB Note:Jumper JP65, for any type of CPU other than above listed, leave "Open". DRAM CONFIGURATION Size Bank 0 Bank 1 Bank 2 Bank 3 2MB (1) 256K x (1) 256K x NONE NONE 36 36 4MB (1) 256K x (1) 256K x (1) 256K x (1) 256K x 36 36 36 36 4MB (1) 1M x 36 NONE NONE NONE 5MB (1) 256K x (1) 1M x 36 NONE NONE 36 8MB (1) 1M x 36 (1) 1M x 36 NONE NONE 10MB (1) 256K x (1) 256K x (1) 1M x 36 (1) 1M x 36 36 36 12MB (1) 1M x 36 NONE (1) 1M x 36 (1) 1M x 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 20MB (1) 1M x 36 (1) 4M x 36 NONE NONE 20MB (1) 1M x 36 NONE (1) 4M x 36 NONE 32MB (1) 4M x 36 (1) 4M x 36 NONE NONE 64MB (1) 16M x 36 NONE NONE NONE 64MB (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 128MB (1) 16M x 36 (1) 16M x 36 NONE NONE 128MB (1) 16M x 36 NONE (1) 16M x 36 NONE CACHE CONFIGURATION Size Bank 0 Bank 1 TAG 64KB (4) 8K x 8 (4) 8K x 8 (1) 8K x 8 128KB (4) 32K x 8 NONE (1) 32K 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 JP10 JP11 JP13 JP50 64KB Open Open pins 2 & 3 Open closed 128KB Open Closed pins 1 & 2 Open closed 256KB Closed Closed pins 2 & 3 Open closed 512KB Closed Closed pins 1 & 2 Closed closed INTERNAL CACHE TYPE CONFIGURATION CPU Type Internal Cache Type JP58 JP59 P24T Write-Through Open N/A P24T Write-Back Closed N/A P24D Write-Through N/A Open P24D Write-Back N/A Closed CPU TYPE CONFIGURATION CPU Type JP3 JP5 JP8 JP42 JP43 JP44 80486SX Open Open pins 2 Open pins 1 Open & 3 & 2 AM486 pins 1 pins 2 pins 1 Open pins 1 Open & 2 & 3 & 2 & 2 Cx486S Open Open pins 2 pins 2 pins 1 Open & 3 & 3 & 2 80487SX pins 2 pins 2 pins 1 Open pins 1 Open & 3 & 3 & 2 & 2 Cx486S2 Open Open pins 2 pins 2 pins 2 Open & 3 & 3 & 3 80486DX pins 1 pins 2 pins 1 Open pins 1 Open & 2 & 3 & 2 & 2 Cx486DX pins 1 pins 2 pins 1 pins 2 pins 1 Open & 2 & 3 & 2 & 3 & 2 Cx486DX2 pins 1 pins 2 pins 1 pins 2 pins 2 Open & 2 & 3 & 2 & 3 & 3 P24C (DX4) pins 1 pins 2 pins 1 pins 1 pins 1 Closed & 2 & 3 & 2 & 2 & 2 P24T pins 2 pins 2 pins 1 Open pins 1 Open & 3 & 3 & 2 & 2 P24D pins 2 pins 2 pins 1 Open pins 1 Open & 3 & 3 & 2 & 2 Note:Pins designated are in the closed position. CPU TYPE CONFIGURATION (CONTINUED) CPU Type JP45 JP46 JP47 JP48 JP49 80486SX Open Open Open Open pins 1 & 2 AMD486 Open Open Open Open pins 1 & 2 Cx486S Open Open Closed Closed pins 1 & 2 80487SX Open Open Open Open pins 1 & 2 Cx486S2 Open Open Closed Closed pins 2 & 3 80486DX Open Open Open Open pins 1 & 2 Cx486DX Open Open Closed Closed pins 1 & 2 Cx486DX2 Open Open Closed Closed pins 2 & 3 P24C (DX4) Closed Closed Open Open pins 1 & 2 P24T Open Open Open Open pins 1 & 2 P24D Open Open Open Open pins 1 & 2 Note:Pins designated are in the closed position. CPU TYPE (S-SERIES) CONFIGURATION CPU Type JP3 JP5 JP8 JP42 JP43 JP44 80486SX Open Open pins 2 pins 1 pins 1 Closed & 3 & 2 & 2 80486DX pins 1 pins 2 pins 1 pins 1 pins 1 Closed & 2 & 3 & 2 & 2 & 2 Note:Pins designated are in the closed position. CPU TYPE (S-SERIES) CONFIGURATION CPU Type JP45 JP46 JP47 JP48 JP49 80486SX Closed Closed Open Open pins 1 & 2 80486DX Closed Closed Open Open pins 1 & 2 Note:Pins designated are in the closed position. BUS SPEED (ID3) CONFIGURATION CPU speed JP34 <= 33MHz Open > 33MHz Closed VESA WAIT STATE (ID2) CONFIGURATION Wait states JP33 0 wait states Open 1 wait state Closed SYSTEM CLOCK (NOT FOR P24C) CONFIGURATION Frequency JP21 JP22 JP23 20MHz pins 2 & 3 pins 2 & 3 pins 1 & 2 closed closed closed 25MHz pins 2 & 3 pins 1 & 2 pins 2 & 3 closed closed closed 33MHz pins 1 & 2 pins 2 & 3 pins 2 & 3 closed closed closed 40MHz pins 2 & 3 pins 1 & 2 pins 1 & 2 closed closed closed 50MHz pins 1 & 2 pins 2 & 3 pins 1 & 2 closed closed closed SYSTEM CLOCK (FOR P24C (DX4)) CONFIGURATION Frequency JP21 JP22 JP23 25MHz pins 2 & 3 Open pins 2 & 3 closed closed 33MHz Open pins 2 & 3 pins 2 & 3 closed closed 50MHz Open pins 2 & 3 Open closed