UNIDENTIFIED
286-12/16/20
Processor | 80286 |
Processor Speed | 12/16/20MHz |
Chip Set | Acer |
Max. Onboard DRAM | 4MB |
Cache | None |
BIOS | AMI |
Dimensions | 330mm x 218mm |
I/O Options | None |
NPU Options | 80287 |
CONNECTIONS | |||
Purpose | Location | Purpose | Location |
External battery | J1 | Reset switch | CN3 |
Speaker | CN1 | Turbo switch | CN4 |
Turbo LED | CN2 | Power LED & keylock | CN5 |
USER CONFIGURABLE SETTINGS | |||
Function | Jumper | Position | |
Coprocessor synchronous with CPU | J2 | pins 2 & 3 closed | |
Coprocessor asynchronous with CPU (need extra OSC) | J2 | pins 1 & 2 closed | |
» | 8 bit BIOS enabled | J3 | Closed |
16 bit BIOS enabled | J3 | Open | |
» | Bus speed select AT clock | J4 | Closed |
Bus speed select 1/2 CPU clock | J4 | Open | |
» | Parity check enabled | J5 | Open |
Parity check disabled | J5 | Closed | |
» | CMOS memory normal operation | J7 | Open |
CMOS memory clear | J7 | Closed | |
» | Monitor type select monochrome | J8 | pins 1 & 2 closed |
Monitor type select color | J8 | pins 2 & 3 closed | |
» | Internal battery enabled | J9 | pins 2 & 3 closed |
External battery enabled | J9 | pins 1 & 2 closed | |
Note:The exact location of jumper J7 is unidentified by the manufacturer. |
DRAM CONFIGURATION | ||||
Size | Bank 0 | Parity 0 | Bank 1 | Parity 1 |
512KB | (4) 44256 | (2) 41256 | NONE | NONE |
640KB | (4) 44256 | (2) 41256 | (4) 4464 | (2) 4164 |
640KB | (2) 256K x 9 | (2) 41256 | (4) 4464 | (2) 4164 |
1024KB | (4) 44256 | (2) 41256 | (4) 44256 | (2) 4164 |
1024KB | (2) 256K x 9 | NONE | (2) 256K x 9 | NONE |
2048KB | (2) 1M x 9 | NONE | NONE | NONE |
4096KB | (2) 1M x 9 | NONE | (2) 1M x 9 | NONE |