MICRONICS COMPUTERS, INC. EISA 3 VL-BUS SYSTEM BOARD Processor 80486SX/80487SX/80486DX/80486DX2/Pentium Overdrive Processor Speed 25/33/50(internal)/66(internal)MHz Chip Set Micronics Max. Onboard 64MB DRAM Cache 64/128/256/512KB BIOS Phoenix Dimensions 355mm x 304mm I/O Options 32-bit VESA local bus slots (2), floppy drive interface, IDE interface, parallel port, serial ports (2) NPU Options None [Image] CONNECTIONS Purpose Location Purpose Location Hard drive LED CN1 Parallel port J30 External battery J3 Floppy drive J31 interface Turbo switch J4 IDE interface J32 Turbo LED J5 Serial port 1 J33 Power LED & keylock J8 Serial port 2 J34 Speaker J10 32-bit VESA Local bus S1 slot Reset switch J11 32-bit VESA Local bus S2 slot External keyboard J13 connector USER CONFIGURABLE SETTINGS Function Jumper Position » Factory configured - do not W1 pins 1 & 2 alter closed » Monitor type select color W7 Closed Monitor type select monochrome W7 Open » AT style keyboard W16 Open PS/2 style keyboard W16 Closed » CMOS memory normal operation W17 pins 1 & 2 closed CMOS memory clear W17 pins 2 & 3 closed » Real Time Clock memory normal W18 Open operation Real Time Clock memory clear W18 Closed Note: W18 may not appear on the system mainboard, depending upon the clock chip installed. If W18 is present, use it instead of W17. The location of W18 is unknown. DRAM CONFIGURATION Size Bank 0 Bank 1 Bank 2 Bank 3 4MB (1) 1M x 36 NONE NONE NONE 8MB (1) 1M x 36 (1) 1M x 36 NONE NONE 12MB (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 NONE 16MB (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 16MB (1) 4M x 36 NONE NONE NONE 20MB (1) 1M x 36 (1) 4M x 36 NONE NONE 24MB (1) 1M x 36 (1) 1M x 36 (1) 4M x 36 NONE 32MB (1) 4M x 36 (1) 4M x 36 NONE NONE 36MB (1) 1M x 36 (1) 4M x 36 (1) 4M x 36 NONE 40MB (1) 1M x 36 (1) 1M x 36 (1) 4M x 36 (1) 4M x 36 48MB (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 NONE 64MB (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 CACHE CONFIGURATION Size Bank 0 Bank TAG/U42 TAG/U43 TAG/U44 TAG/U45 1 64KB (4) 8K (4) NONE NONE (1) 64K (1) 8K x x 8 8K x x 8 8 8 128KB (4) 32K NONE NONE NONE (1) 64K (1) 8K x x 8 x 8 8 256KB (4) 32K (4) (1) 16K (1) 16K (1) 64K NONE x 8 32K x x1 x1 x 8 8 512KB (4) NONE NONE NONE (1) 64K (1) 32K x 128K x x 8 8 8 CACHE JUMPER CONFIGURATION Size W8 W9 W10 W11 W12 W13 W14 W15 64KB 1 & 1 & 1 & 2 1 & 2 1 & 2 1 & 2 3 & 4 2 & 3 2 2 128KB 2 & 1 & 1 & 2 2 & 3 1 & 2 1 & 2 4 & 5 1 & 2 3 2 256KB 2 & 2 & 1 & 2 2 & 3 2 & 3 1 & 2 1 & 2 1 & 2 3 3 512KB 2 & 2 & 2 & 3 2 & 3 2 & 3 2 & 3 4 & 5 1 & 2 3 3 Note:Pins designated should be in the closed position. CPU TYPE CONFIGURATION U1 U2 W2 W5 W6 None 80486SX (PQFP) pins 1 & pins 1 & None 2 2 80486SX None pins 1 & pins 2 & pins 2 & 3 2 3 80487SX 80486SX (PQFP) pins 1 & pins 2 & pins 1 & 2, 2 3 3 & 4 80487SX None pins 1 & pins 2 & pins 1 & 2, 2 3 3 & 4 80486DX 80486SX (PQFP) pins 2 & pins 1 & pins 1 & 2, 3 2 3 & 4 80486DX None pins 2 & pins 1 & pins 1 & 2, 3 2 3 & 4 80486DX2 80486SX (PQFP) pins 1 & pins 2 & pins 1 & 2, 2 3 3 & 4 80486DX2 None pins 1 & pins 1 & pins 1 & 2, 2 2 3 & 4 Pentium None pins 2 & pins 2 & pins 1 & 2, Overdrive 3 3 3 & 4 Note:Pins designated should be in the closed position. CPU SPEED CONFIGURATION CPU Speed W3 80486SX/80486DX 25MHz On 80486SX/80486DX 33MHz Off 80486DX2 50i MHz On 80486DX2 66i MHz Off