486WB Motherboard Settings and Configuration
SILICON VALLEY COMPUTER, INC.
486WB
Processor | 80486DX |
Processor Speed | 33/50MHz |
Chip Set | OPTI |
Max. Onboard DRAM | 32MB |
Cache | 64/256KB |
BIOS | C & T |
Dimensions | 330mm x 218mm |
I/O Options | 32-bit external memory card slot |
NPU Options | 4167 |
CONNECTIONS | |||
Purpose | Location | Purpose | Location |
External battery | J10 | 32-bit external memory card | S1 |
Power LED & keylock | J23 | Reset switch | SW1 |
Speaker | J24 | Turbo switch | SW2 |
Turbo LED | JP12 |
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USER CONFIGURABLE SETTINGS | |||
Function | Jumper | Position | |
» | Monitor type select CGA | JP1 | Closed |
| Monitor type select monochrome, EGA, or VGA | JP1 | Open |
» | CMOS memory normal operation | JP2 | pins 2 & 3 closed |
| CMOS memory clear | JP2 | pins 1 & 2 closed |
» | Bus speed select ATCLK/4 | JP3 | Closed |
| Bus speed select ATCLK/6 | JP3 | Open |
» | Factory configured - do not alter | JP4 | N/A |
» | Factory configured - do not alter | JP5 | N/A |
» | Factory configured - do not alter | JP6 | N/A |
» | Factory configured - do not alter | JP7 | N/A |
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) 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 |
20MB | (4) 4M x 9 | (4) 1M x 9 |
32MB | (4) 4M x 9 | (4) 4M x 9 |
CACHE CONFIGURATION | |||
Size | Bank 0 | TAG (U33) | TAG (U34) |
64KB | (8) 8K x 8 | (1) 64K x 1 | (1) 8K x 8 |
256KB | (8) 8K x 8 | (1) 64K x 1 | (1) 32K x 8 |
CACHE JUMPER CONFIGURATION | ||||
Size | JP8 | JP9 | JP10 | JP11 |
64KB | Open | Open | Open | Open |
256KB | Closed | Closed | Closed | Closed |
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