EFA CORPORATION 4MHL3S Processor CX486SX/80486SX/CX486DX/80486DX/80486DX2 Processor Speed 20/25/33/40/50(internal)/50/66(internal)MHz Chip Set UMC Max. Onboard DRAM64MB Cache 32/64/128/256KB BIOS AMI Dimensions 330mm x 218mm I/O Options 32-bit VESA local bus slots (3) NPU Options None [Image] CONNECTIONS Purpose Location Purpose Location External battery JP21 Reset switch JP26 Power LED & keylock JP22 Green PC connector JP28 Speaker JP23 32-bit VESA Local bus S1 slot Turbo LED JP24 32-bit VESA Local bus S2 slot Turbo switch JP25 32-bit VESA Local bus S3 slot USER CONFIGURABLE SETTINGS Function Jumper Position External battery enabled JP1 Open Internal battery enabled JP1 Closed CPU CX486SX & CX487SX enabled JP6 pins 1 & 2 closed CPU CX486SX & CX487SX disabled JP6 Open » Trident 9000 video card not JP8 pins 1 & 2 installed closed Trident 9000 video card JP8 pins 2 & 3 installed closed » External green card enabled JP10 pins 2 & 3 closed External green card disabled JP10 pins 1 & 2 closed » Factory configured - do not JP13 pins 1 & 2 alter closed 32K x 8 TAG enabled JP27 pins 1 & 2 closed 16K x 8 TAG enabled JP27 pins 2 & 3 closed » Factory configured - do not JP29 pins 2 & 3 alter closed » Factory configured - do not JP30 pins 2 & 3 alter closed » Factory configured - do not JP31 Closed alter DRAM CONFIGURATION Size Bank 0 Bank 1 Bank 2 1MB (4) 256K x 9 NONE NONE 2MB (4) 256K x 9 (1) 256K x 36 NONE 2MB (4) 256K x 9 NONE (1) 256K x 36 2MB NONE (1) 256K x 36 (1) 256K x 36 2MB NONE (1) 512K x 36 NONE 2MB NONE NONE (1) 512K x 36 3MB (4) 256K x 9 (1) 256K x 36 (1) 256K x 36 3MB (4) 256K x 9 (1) 512K x 36 NONE 3MB NONE (1) 512K x 36 (1) 256K x 36 3MB NONE (1) 256K x 36 (1) 512K x 36 4MB (4) 1M x 9 NONE NONE 4MB NONE (1) 512K x 36 (1) 512K x 36 4MB (4) 256K x 9 (1) 512K x 36 (1) 256K x 36 5MB (4) 1M x 9 (1) 256K x 36 NONE 5MB (4) 1M x 9 NONE (1) 256K x 36 5MB NONE (1) 1M x 36 (1) 256K x 36 5MB NONE (1) 256K x 36 (1) 1M x 36 5MB (4) 256K x 9 (1) 1M x 36 NONE 5MB (4) 256K x 9 NONE (1) 1M x 36 6MB (4) 1M x 9 (1) 256K x 36 (1) 256K x 36 6MB (4) 256K x 9 (1) 1M x 36 (1) 256K x 36 6MB (4) 256K x 9 (1) 256K x 36 (1) 1M x 36 6MB NONE (1) 1M x 36 (1) 512K x 36 6MB NONE (1) 512K x 36 (1) 1M x 36 7MB (4) 1M x 9 (1) 512K x 36 (1) 256K x 36 8MB (4) 1M x 9 (1) 1M x 36 NONE 8MB (4) 1M x 9 NONE (1) 1M x 36 8MB NONE (1) 1M x 36 (1) 1M x 36 DRAM CONFIGURATION (CONT.) Size Bank 0 Bank 1 Bank 2 9MB (4) 1M x 9 (1) 1M x 36 (1) 256K x 36 9MB (4) 1M x 9 (1) 256K x 36 (1) 1M x 36 9MB (4) 256K x 9 (1) 1M x 36 (1) 1M x 36 10MB NONE (1) 2M x 36 (1) 512K x 36 10MB (4) 1M x 9 (1) 512K x 36 (1) 1M x 36 12MB (4) 1M x 9 (1) 1M x 36 (1) 1M x 36 12MB (4) 1M x 9 (1) 2M x 36 NONE 12MB NONE (1) 2M x 36 (1) 1M x 36 12MB NONE (1) 1M x 36 (1) 2M x 36 13MB (4) 256K x 9 (1) 2M x 36 (1) 1M x 36 13MB (4) 1M x 9 (1) 2M x 36 (1) 256K x 36 16MB (4) 4M x 9 NONE NONE 16MB (4) 1M x 9 (1) 2M x 36 (1) 1M x 36 16MB NONE (1) 2M x 36 (1) 2M x 36 17MB (4) 4M x 9 (1) 256K x 36 NONE 17MB (4) 4M x 9 NONE (1) 256K x 36 17MB (4) 256K x 9 (1) 4M x 36 NONE 17MB (4) 256K x 9 NONE (1) 4M x 36 18MB (4) 4M x 9 (1) 256K x 36 (1) 256K x 36 18MB (4) 256K x 9 (1) 4M x 36 (1) 256K x 36 18MB (4) 256K x 9 (1) 256K x 36 (1) 4M x 36 19MB (4) 4M x 9 (1) 512K x 36 (1) 256K x 36 20MB (4) 4M x 9 (1) 1M x 36 NONE 20MB (4) 4M x 9 NONE (1) 1M x 36 20MB (4) 1M x 9 (1) 4M x 36 NONE 20MB (4) 1M x 9 NONE (1) 4M x 36 21MB (4) 256K x 9 (1) 4M x 36 (1) 1M x 36 21MB (4) 256K x 9 (1) 1M x 36 (1) 4M x 36 21MB (4) 1M x 9 (1) 4M x 36 (1) 256K x 36 21MB (4) 1M x 9 (1) 256K x 36 (1) 4M x 36 21MB (4) 4M x 9 (1) 1M x 36 (1) 256K x 36 21MB (4) 4M x 9 (1) 256K x 36 (1) 1M x 36 22MB (4) 4M x 9 (1) 512K x 36 (1) 1M x 36 24MB (4) 4M x 9 (1) 1M x 36 (1) 1M x 36 24MB (4) 1M x 9 (1) 4M x 36 (1) 1M x 36 24MB (4) 1M x 9 (1) 1M x 36 (1) 4M x 36 24MB NONE (1) 4M x 36 (1) 2M x 36 24MB NONE (1) 2M x 36 (1) 4M x 36 25MB (4) 256K x 9 (1) 2M x 36 (1) 4M x 36 25MB (4) 4M x 9 (1) 2M x 36 (1) 256K x 36 28MB (4) 4M x 9 (1) 2M x 36 (1) 1M x 36 28MB (4) 1M x 9 (1) 2M x 36 (1) 4M x 36 32MB (4) 4M x 9 (1) 4M x 36 NONE 32MB (4) 4M x 9 NONE (1) 4M x 36 32MB NONE (1) 4M x 36 (1) 4M x 36 DRAM CONFIGURATION (CONT.) Size Bank 0 Bank 1 Bank 2 33MB (4) 256K x 9 (1) 4M x 36 (1) 4M x 36 33MB (4) 4M x 9 (1) 256K x 36 (1) 4M x 36 33MB (4) 4M x 9 (1) 4M x 36 (1) 256K x 36 34MB (4) 4M x 9 (1) 512K x 36 (1) 4M x 36 36MB (4) 1M x 9 (1) 4M x 36 (1) 4M x 36 36MB (4) 4M x 9 (1) 1M x 36 (1) 4M x 36 36MB (4) 4M x 9 (1) 4M x 36 (1) 1M x 36 40MB (4) 4M x 9 (1) 2M x 36 (1) 4M x 36 48MB (4) 4M x 9 (1) 4M x 36 (1) 4M x 36 64MB (4) 16M x 9 NONE NONE CLOCK GENERATOR CONFIGURATION Clock Type JP32 JP33 MX8310 pins 1 & 2 closed Open MX8315 Open Closed CACHE CONFIGURATION Size Bank 0 Bank 1 TAG 32KB (4) 8K x 8 NONE (1) 8K x 8 64KB (4) 8K x 8 (4) 8K x 8 (1) 8K x 8 128KB (4) 32K x 8 NONE (1) 8K x 8 256KB (4) 32K x 8 (4) 32K x 8 (1) 16K x 8 256KB (4) 32K x 8 (4) 32K x 8 (1) 32K x 8 CACHE JUMPER CONFIGURATION Size JP15 JP16 JP17 JP19 JP20 32KB pins 2 & Open Open Open Open 3 64KB pins 1 & Open Open Closed Open 2 128KB pins 2 & pins 2 & Closed Closed Open 3 3 256KB pins 1 & pins 1 & Closed Closed Closed 2 2 Note:Pins designated should be in the closed position. CPU TYPE CONFIGURATION Type JP9 JP11 80486SX Open pins 2 & 3 closed ODP486SX pins 2 & 3 closed pins 1 & 2, and 3 & 4 closed CX486SX/CX487SX pins 1 & 2 closed pins 1 & 2, and 3 & 4 closed 80486DX2 pins 1 & 2 closed pins 1 & 2, and 3 & 4 closed 80486DX2 Overdrive pins 2 & 3 closed pins 1 & 2, and 3 & 4 closed CPU SPEED CONFIGURATION Speed JP2 JP3 JP4 JP7 20MHz Open Open Open pins 1 & 2 closed 25MHz Closed Open Open pins 1 & 2 closed 33MHz Closed Closed Closed pins 1 & 2 closed 40MHz Closed Closed Open pins 2 & 3 closed 50i MHz Closed Open Open pins 1 & 2 closed 50MHz Open Open Closed pins 2 & 3 closed 66i MHz Closed Closed Closed pins 1 & 2 closed NPU TYPE CONFIGURATION Type JP12 JP14 Intel CPU or CX486SX pins 2 & 3 closed Open CX486SX & CX487SX pins 1 & 2 closed pins 2 & 3 closed VESA WAIT STATE/BUS SPEED CONFIGURATION CPU speed Wait states JP18 £ 33MHz 0 wait states Open > 33MHz 1 wait state Closed