UNIDENTIFIED
80386 MOTHERBOARD
Processor | 80386DX |
Processor Speed | 25MHz |
Chip Set | C & T |
Max. Onboard DRAM | 8MB |
Cache | None |
BIOS | AMI/Award/Phoenix |
Dimensions | 330mm x 218mm |
I/O Options | 32-bit external memory card slots (2) |
NPU Options | 80287/80387 |
CONNECTIONS | |||
Purpose | Location | Purpose | Location |
Speaker | J11 | 32-bit external memory card | S1 |
Turbo switch | J12 | 32-bit external memory card | S2 |
Power LED & keylock | J13 | Reset switch | SW1 |
External battery | JP10 | Turbo LED | SW2 |
USER CONFIGURABLE SETTINGS | |||
Function | Jumper | Position | |
» | Monitor type select color | JP8 | pins 1 & 2 closed |
Monitor type select monochrome | JP8 | pins 2 & 3 closed | |
» | CMOS memory normal operation | JP9 | Open |
CMOS memory clear | JP9 | Closed |
DRAM CONFIGURATION | ||||
Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
2MB | (4) 256K x 9 | (4) 256K x 9 | NONE | NONE |
8MB | (4) 1M x 9 | (4) 1M x 9 | NONE | NONE |
10MB | (4) 1M x 9 | (4) 1M x 9 | (36) 41256 | (36) 41256 |
16MB | (4) 1M x 9 | (4) 1M x 9 | (36) 411000 | (36) 411000 |
Note:Banks 2 & 3 are used when a 32-bit external memory card is installed. |
NPU TYPE CONFIGURATION | |||
Type | JP3 | JP6 | JP7 |
80287 | Open | Closed | Open |
80387 | Closed | Closed | Closed |
Disabled | Open | Open | Open |
NPU MODE CONFIGURATION | ||
Setting | JP2 | JP4 |
Synchronous with cpu | pins 1 & 2 closed | pins 2 & 3 closed |
Synchronous with oscillator osc1 | pins 2 & 3 closed | pins 1 & 2 closed |
BIOS CONFIGURATION | ||
Setting | JP1 | JP20 |
AMI/Award | pins 1 & 2 closed | pins 1 & 2 closed |
Phoenix | pins 2 & 3 closed | pins 2 & 3 closed |