UNIDENTIFIED
486SX/DX/DX2
Processor | 80486SX/80487SX/ODP80486SX/80486DX/80486DX2 |
Processor Speed | 16/20/25/33/50/55i/66iMHz |
Chip Set | OPTI |
Max. Onboard DRAM | 32MB |
Cache | 64/128KB |
BIOS | AMI |
Dimensions | 330mm x 218mm |
I/O Options | None |
NPU Options | None |
CONNECTIONS | |||
Purpose | Location | Purpose | Location |
External battery | J1 | Turbo LED | J4 |
Speaker | J2 | Turbo switch | J5 |
Power LED & keylock | J3 | Reset switch | J6 |
USER CONFIGURABLE SETTINGS | |||
Function | Jumper | Position | |
» | Monitor type select color | JP1 | Closed |
Monitor type select monochrome | JP1 | 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 | JP8 | N/A |
» | Power on clock select CLKI/4 | JP9 | pins 1 & 2 closed |
Power on clock select CLKI/6 | JP9 | pins 2 & 3 closed | |
» | CMOS memory normal operation | JP10 | pins 2 & 3 closed |
CMOS memory clear | JP10 | pins 1 & 2 closed | |
» | Factory configured - do not alter | JP12 | 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 |
32MB | (4) 4M x 9 | (4) 4M x 9 |
CACHE CONFIGURATION | ||||
Size | Bank 0 | Bank 1 | TAG0 | TAG1 |
64KB | (4) 8K x 8 | (4) 8K x 8 | (1) 8K x 8 | (1) 16K x 4 |
128KB | (4) 32K x 8 | (4) 32K x 8 | (1) 8K x 8 | (1) 16K x 4 |
CACHE JUMPER CONFIGURATION | |||
Size | JP2 | JP3 | JP7 |
64KB | pins 1 & 2 closed | pins 1 & 2 closed | pins 1 & 2 closed |
128KB | pins 2 & 3 closed | pins 2 & 3 closed | pins 2 & 3 closed |
CPU TYPE CONFIGURATION | ||
Type | JP13 | JP14 |
80486SX | pins 2 & 3 closed | pins 2 & 3 closed |
80486DX | pins 1 & 2 closed | pins 1 & 2 closed |
80486DX2 | pins 1 & 2 closed | pins 1 & 2 closed |
CPU SPEED CONFIGURATION | |
Speed | JP11 |
25MHz | pins 2 & 3 closed |
33MHz | pins 2 & 3 closed |
40MHz | pins 1 & 2 closed |
50iMHz | pins 1 & 2 closed |
66iMhz | pins 2 & 3 closed |