EISA 3 VL-BUS SYSTEM BOARD Motherboard Settings and Configuration
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 DRAM | 64MB |
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 |
CONNECTIONS | |||
Purpose | Location | Purpose | Location |
Hard drive LED | CN1 | Parallel port | J30 |
External battery | J3 | Floppy drive interface | J31 |
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 slot | S1 |
Reset switch | J11 | 32-bit VESA Local bus slot | S2 |
External keyboard connector | J13 |
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USER CONFIGURABLE SETTINGS | |||
Function | Jumper | Position | |
» | Factory configured - do not alter | W1 | pins 1 & 2 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 operation | W18 | Open |
| 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 1 | TAG/U42 | TAG/U43 | TAG/U44 | TAG/U45 |
64KB | (4) 8K x 8 | (4) 8K x 8 | NONE | NONE | (1) 64K x 8 | (1) 8K x 8 |
128KB | (4) 32K x 8 | NONE | NONE | NONE | (1) 64K x 8 | (1) 8K x 8 |
256KB | (4) 32K x 8 | (4) 32K x 8 | (1) 16K x1 | (1) 16K x1 | (1) 64K x 8 | NONE |
512KB | (4) 128K x 8 | NONE | NONE | NONE | (1) 64K x 8 | (1) 32K x 8 |
CACHE JUMPER CONFIGURATION | ||||||||
Size | W8 | W9 | W10 | W11 | W12 | W13 | W14 | W15 |
64KB | 1 & 2 | 1 & 2 | 1 & 2 | 1 & 2 | 1 & 2 | 1 & 2 | 3 & 4 | 2 & 3 |
128KB | 2 & 3 | 1 & 2 | 1 & 2 | 2 & 3 | 1 & 2 | 1 & 2 | 4 & 5 | 1 & 2 |
256KB | 2 & 3 | 2 & 3 | 1 & 2 | 2 & 3 | 2 & 3 | 1 & 2 | 1 & 2 | 1 & 2 |
512KB | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 | 4 & 5 | 1 & 2 |
Note:Pins designated should be in the closed position. | ||||||||
CPU TYPE CONFIGURATION | ||||
U1 | U2 | W2 | W5 | W6 |
None | 80486SX (PQFP) | pins 1 & 2 | pins 1 & 2 | None |
80486SX | None | pins 1 & 2 | pins 2 & 3 | pins 2 & 3 |
80487SX | 80486SX (PQFP) | pins 1 & 2 | pins 2 & 3 | pins 1 & 2, 3 & 4 |
80487SX | None | pins 1 & 2 | pins 2 & 3 | pins 1 & 2, 3 & 4 |
80486DX | 80486SX (PQFP) | pins 2 & 3 | pins 1 & 2 | pins 1 & 2, 3 & 4 |
80486DX | None | pins 2 & 3 | pins 1 & 2 | pins 1 & 2, 3 & 4 |
80486DX2 | 80486SX (PQFP) | pins 1 & 2 | pins 2 & 3 | pins 1 & 2, 3 & 4 |
80486DX2 | None | pins 1 & 2 | pins 1 & 2 | pins 1 & 2, 3 & 4 |
Pentium Overdrive | None | pins 2 & 3 | pins 2 & 3 | pins 1 & 2, 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 |
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