UNIDENTIFIED
80286 MOTHER BOARD
Processor | 80286 |
Processor Speed | 12/25MHz |
Chip Set | Suntac |
Max. Onboard DRAM | 4MB |
Cache | Award/Phoenix |
BIOS | Unidentified |
Dimensions | 330mm x 218mm |
I/O Options | None |
NPU Options | 80287 |
CONNECTIONS | |||
Purpose | Location | Purpose | Location |
Speaker | J19 | Turbo LED | JP5 |
Power LED & keylock | J20 | Reset switch | JP6 |
External battery | J21 |
USER CONFIGURABLE SETTINGS | |||
Function | Jumper/Switch | Position | |
» | Factory configured - do not alter | DSP1/2 | N/A |
» | Factory configured - do not alter | DSP1/4 | N/A |
» | Factory configured - do not alter | J18 | pins 2 & 3 closed |
BIOS type select Award | JP7 | pins 2 & 3 closed | |
BIOS type select Phoenix | JP7 | pins 1 & 2 closed | |
Memory wait state select 0 wait states | JP11 | Closed | |
Memory wait state select 1 wait state | JP11 | Open | |
Monitor type select color | SW1 | pins 2 & 3 closed | |
Monitor type select monochrome | SW1 | pins 1 & 2 closed | |
Note: The location of J18 is unidentified. |
DRAM CONFIGURATION | |||||
Mode | Size | Base memory | EMS | Bank 0 | Bank 1 |
0 | 512KB | 512KB | N/A | (18) 41256 | NONE |
1 | 640KB | 640KB | N/A | (18) 41256 | (18) 4164 |
2 | 1MB | 1MB | N/A | (18) 41256 | (18) 41256 |
3 | 1MB | 640KB | 384KB | (18) 41256 | (18) 41256 |
4 | 2MB | 2MB | N/A | (18) 411000 | NONE |
5 | 2MB | 640KB | 1408KB | (18) 411000 | NONE |
6 | 4MB | 4MB | N/A | (18) 411000 | (18) 411000 |
7 | 4MB | 640KB | 3456KB | (18) 411000 | (18) 411000 |
DRAM SWITCH CONFIGURATION | |||
Mode | DSP1/6 | DSP1/7 | DSP1/8 |
0 | On | On | On |
1 | On | On | Off |
2 | On | Off | On |
3 | On | Off | Off |
4 | Off | On | On |
5 | Off | On | Off |
6 | Off | Off | On |
7 | Off | Off | Off |
DRAM MODE CONFIGURATION | |
Setting | JP8 |
Mode changes external | Closed |
Mode changes internal | Open |
CLOCK SPEED CONFIGURATION | |||
Setting | DSP1/1 | JP1 | JP4 |
High speed (internal) | Off | pins 2 & 3 closed | N/A |
Low speed (internal) | On | pins 2 & 3 closed | N/A |
High speed (external) | N/A | pins 1 & 2 closed | Closed |
Low speed (external) | N/A | pins 1 & 2 closed | Open |
Note: If JP4 is open, speed can be switched through the keyboard. High speed: CNTL, ALT, 2. Low speed: CNTL, ALT, 1. (Award BIOS only) |
I/O WAIT STATE CONFIGURATION | ||
Wait states | JP3 | DSP1/3 |
4 | pins 2 & 3 closed | On |
6 | pins 2 & 3 closed | Off |
6 | pins 1 & 2 closed | N/A |
Note: The location of JP3 is unidentified. |
BIOS CONFIGURATION | ||
Type | JP9 | DSP1/5 |
27128 | pins 1 & 2 closed | On |
27256 | pins 2 & 3 closed | Off |
Note: The location of JP9 is unidentified. |