UNIDENTIFIED
386SX-25
Processor | 80386SX |
Processor Speed | 25MHz |
Chip Set | Unidentified |
Max. Onboard DRAM | 16MB |
Cache | None |
BIOS | Unidentified |
Dimensions | 330mm x 218mm |
I/O Options | None |
NPU Options | 80387SX |
CONNECTIONS | |||
Purpose | Location | Purpose | Location |
External battery | JP17 | Turbo switch | JP24 |
Speaker | JP21 | Turbo LED | JP25 |
Power LED & keylock | JP22 | Reset switch | JP26 |
USER CONFIGURABLE SETTINGS | |||
Function | Jumper | Position | |
» | CMOS memory normal operation | JP16 | Open |
CMOS memory clear | JP16 | Closed | |
» | Monitor type select color | JP18 | Closed |
Monitor type select monochrome | JP18 | Open | |
» | Floppy drive current select (24mA) | JP19 | Closed |
Floppy drive current select (12mA) | JP19 | Open | |
» | Pipeline mode enabled | JP20 | Closed |
Pipeline mode disabled | JP20 | Open | |
» | NPU disabled | JP23 | pins 2 & 3 closed |
NPU enabled | JP23 | pins 1 & 2 closed |
DRAM CONFIGURATION | ||||||
Size | Bank 0 | P-0 | Bank 1 | P-1 | Bank 2 | Bank 3 |
512KB | (4) 44256 | (2) 41256 | NONE | NONE | NONE | NONE |
512KB | NONE | NONE | NONE | NONE | (2) 256K x 9 | NONE |
1MB | (4) 44256 | (2) 41256 | (4) 44256 | (2) 41256 | NONE | NONE |
1MB | NONE | NONE | NONE | NONE | (2) 256K x 9 | (2) 256K x 9 |
2MB | (4) 441000 | (2) 411000 | NONE | NONE | NONE | NONE |
2MB | NONE | NONE | NONE | NONE | (2) 1M x 9 | NONE |
4MB | (4) 441000 | (2) 411000 | (4) 441000 | (2) 411000 | NONE | NONE |
4MB | NONE | NONE | NONE | NONE | (2) 1M x 9 | (2) 1M x 9 |
8MB | NONE | NONE | NONE | NONE | (2) 4M x 9 | NONE |
16MB | NONE | NONE | NONE | NONE | (2) 4M x 9 | (2) 4M x 9 |