QUICKPATH SYSTEMS, INC.
486SX/DX MOTHERBOARD
Processor | 80486SX/80487SX/80486DX/80486DX2 |
Processor Speed | 16/20/25/33/50(internal)/50/66(internal)MHz |
Chip Set | OPTI |
Max. Onboard DRAM | 32MB |
Cache | 64/256KB |
BIOS | MR |
Dimensions | 330mm x 218mm |
I/O Options | None |
NPU Options | 4167 |
CONNECTIONS | |||
Purpose | Location | Purpose | Location |
Power LED & keylock | KEY | Speaker | SPK |
Turbo LED | LED | Turbo switch | TSW |
Reset switch | RST |
USER CONFIGURABLE SETTINGS | |||
Function | Jumper | Position | |
» | Bus speed select ATCLK/4 | JP2 | Open |
Bus speed select ATCLK/6 | JP2 | Closed | |
» | Password check enabled | JP6 | Closed |
Password check disabled | JP6 | Open | |
» | CMOS memory normal operation | JP7 | pins 2 & 3 closed |
CMOS memory clear | JP7 | pins 1 & 2 closed | |
» | Battery type select internal | JP13 | pins 1 & 2 closed |
Battery type select external | JP13 | pins 2 & 3 closed |
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) 4M x 9 | (4) 1M x 9 |
20MB | (4) 1M x 9 | (4) 4M x 9 |
32MB | (4) 4M x 9 | (4) 4M x 9 |
CACHE CONFIGURATION | |
Size | Bank 0 |
64KB | (9) 8K x 8 |
256KB | (9) 32K x 8 |
CACHE JUMPER CONFIGURATION | ||||
Size | JP9 | JP10 | JP11 | JP12 |
64KB | Open | Open | Open | Open |
256KB | Closed | Closed | Open | Closed |
CPU CONFIGURATION | |||||
Type | OSC1 | JP1 | JP3 | JP4 | JP5 |
80486SX-16MHz | 32MHz | 2 & 3 | 2 & 3 | Open | Open |
80486SX-20MHz | 40MHz | 2 & 3 | 2 & 3 | Open | Open |
80486SX-25MHz | 50MHz | 2 & 3 | 2 & 3 | Open | Open |
80487SX-20MHz | 40MHz | 2 & 3 | 1 & 2 | Closed | 1 & 2 |
80486DX-25MHz | 50MHz | 2 & 3 | 1 & 2 | Closed | 2 & 3 |
80486DX-33MHz | 66MHz | 2 & 3 | 1 & 2 | Closed | 2 & 3 |
80486DX-50MHz | 50MHz | 1 & 2 | 1 & 2 | Closed | 2 & 3 |
80486DX2-50MHz | 25MHz | 2 & 3 | 1 & 2 | Closed | 2 & 3 |
80486DX2-66MHz | 33MHz | 2 & 3 | 1 & 2 | Closed | 2 & 3 |
Note:Pins designated should be in the closed position. |