EFA CORPORATION ECA 33M50 Processor 80386DX/80486SX/80486DX Processor Speed 16/20/25/33/40/50(internal)/50/66(internal)MHz Chip Set UMC Max. Onboard DRAM 32MB SRAM Cache 64/128/256KB BIOS AMI Dimensions 330mm x 218mm I/O Options None NPU Options 4167 [Image] CONNECTIONS Purpose Location Purpose Location Power LED & keylock J1 Turbo LED J4 Speaker J2 Turbo switch J5 Reset switch J3 External battery J17 USER CONFIGURABLE SETTINGS Function Jumper Position » Monitor type select monochrome J16 open Monitor type select color J16 closed » Factory configured - do not alter J21 open BIOS type select 64K J22 pins 2 & 3 closed BIOS type select 128K J22 pins 1 & 2 closed SRAM CONFIGURATION Size Cache SRAM Location TAG (U22) TAG (U24) 64KB (8) 8K x 8 Banks 0 & 1 (1) 32K x 8 (1) 16K x 4 128KB (4) 32K x 8 Bank 0 (1) 32K x 8 (1) 16K x 4 256KB (8) 32K x 8 Banks 0 & 1 (1) 32K x 8 (1) 16K x 4 SRAM JUMPER CONFIGURATION Size J7 J8 J9 J10 J11 J12 J13 J14 J15 64KB 2 2 open open open open closed 1 & open & & 2 3 3 128KB 1 2 open closed open closed closed 2 & 1 & & & 3 2 2 3 256KB 1 1 closed closed closed closed closed 1 & 2 & & & 2 3 2 2 Note:Pins designated should be in the closed position. 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 5MB (4) 1M x 9 (4) 256K x 9 8MB (4) 1M x 9 (4) 1M x 9 16MB (4) 4M x 9 NONE 20MB (4) 4M x 9 (4) 1M x 9 32MB (4) 4M x 9 (4) 4M x 9 CPU TYPE CONFIGURATION CPU S1 S1 S1 S1 S2 Jumper switch switch switch switch switch J23 1 2 3 4 1-6 80486DX2 closed closed open open open pins 1 & 2 ODP486SX closed closed open open open pins 2 & 3 80486DX closed closed open open open pins 1 & 2 80487SX-25 closed closed open open open pins 2 & 3 80487SX-20 closed closed open closed open pins 2 & 3 80486SX-25 open open closed open open open 80486SX-20 open open closed closed open open 80386DX closed closed open open closed N/A CPU SPEED CONFIGURATION CPU iOSC S3 S3 S3 S3 S2 SPEED switch switch switch switch switchs 1 2 3 4 1-6 80486DX2-50 25MHz closed closed open closed open ODP486SX-66 33MHz closed open closed closed open ODP486SX-50 25MHz closed closed open closed open 80486DX-50 50MHz open open open open open 80486DX-33 33MHz closed open closed closed open 80486DX-25 25MHz closed closed open closed open 80487SX-25 25MHz closed closed open closed open 80487SX-20 40MHz open open closed open open 80486SX-25 25MHz closed closed open closed open 80486SX-20 40MHz open open closed open open 80386DX-40 80MHz closed open open open closed 80386DX-33 66MHz open open open closed closed 80386DX-20 20MHz closed closed closed open closed 80386DX-16 16MHz closed closed closed closed closed