EFA CORPORATION 4M50HL3 Processor CX486SX/80486SX/CX486DX/80486DX/80486DX2/ODP486SX Processor Speed 20/25/33/40/50(internal)/50/66(internal)MHz Chip Set UMC Max. Onboard DRAM32MB Cache 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 J1 Turbo switch J29 Turbo LED J25 32-bit VESA Local bus S1 slot Speaker J26 32-bit VESA Local bus S2 slot Power LED & keylock J27 32-bit VESA Local bus S3 slot Reset switch J28 USER CONFIGURABLE SETTINGS Function Jumper Position » CMOS memory normal operation J2 pins 1 & 2 closed CMOS memory clear J2 pins 2 & 3 closed » On board battery enabled J3 pins 1 & 2 closed On board battery disabled J3 pins 2 & 3 closed » Western Digital HDD (WDAC2340) J5 pins 1 & 2 not installed closed Western Digital HDD (WDAC2340) J5 pins 2 & 3 installed closed DRAM CONFIGURATION Size Bank 0 Bank 3 1MB (4) 256K x 9 NONE 2MB (4) 256K x 9 (4) 256K x 9 4MB (4) 1M x 9 NONE 5MB (4) 256K x 9 (4) 1M x 9 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 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) 8K x 8 256KB (4) 32K x 8 (4) 32K x 8 (1) 32K x 8 CACHE JUMPER CONFIGURATION Size J7 J8 J9 J10 J11 J12 J15 J16 64KB Open 2 Open Open Open Open 1 & 1 & & 2 2 3 128KB 2 & 1 Closed Open Closed Open 1 & 2 & 3 & 2 3 2 256KB 1 & 2 Closed Closed Closed Closed 2 & 2 & 2 & 3 3 3 Note:Pins designated should be in the closed position. CPU SPEED CONFIGURATION Speed J20 SW1/switch SW1/switch SW1/switch SW1/switch 1 2 3 4 20MHz Closed Off Off On Off 25MHz Open On On Off On 33MHz Open On Off On On 40MHz Open Off Off On Off 50i Open On On Off On MHz 50MHz Open Off Off Off Off 66i Open On Off On On MHz CPU TYPE CONFIGURATION Type J13 J14 J17 J18 J19 J20 J21 J24 J30 80486SX 1 & Open Open Open Open N/A Closed 1 & 2 & 2 2 3 CX486SX 2 & Closed 1 & Open Open Open Closed 1 & 2 & 3 2 2 3 80486DX 1 & Open 1 & Closed Closed N/A Open 1 & 2 & 2 2 2 3 CX486SX 2 & Closed 1 & Closed Closed Open Open 1 & 2 & 3 2 2 3 ODP486SX 1 & Open 1 & Closed Closed N/A Open 1 & 2 & 2 2 2 3 80486DX2 1 & Open 1 & Closed Closed N/A Open 1 & 2 & 2 2 2 3 Note: Pins designated should be in the closed position. VESA WAIT STATE/BUS SPEED CONFIGURATION CPU speed Wait states J6 J22 J23 £ 33MHz 0 wait pins 1 & 2 pins 1 & 2 pins 1 & 2 states closed closed closed > 33MHz 1 wait state pins 2 & 3 pins 2 & 3 pins 2 & 3 closed closed closed