UNIDENTIFIED
80386SX-20/25
|
Processor |
80386SX |
|
Processor Speed |
16/20/25MHz |
|
Chip Set |
C & T |
|
Max. Onboard DRAM |
16MB (8MB on external memory card) |
|
Cache |
None |
|
BIOS |
AMI |
|
Dimensions |
330mm x 218mm |
|
I/O Options |
32-bit external memory card |
|
NPU Options |
80287/80387SX |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
Power LED & keylock |
J17 |
Turbo LED |
J22 |
|
Speaker |
J18 |
External battery |
JP30 |
|
Reset switch |
J19 |
32-bit external memory card |
SL1 |
|
Turbo switch |
J21 | ||
|
USER CONFIGURABLE SETTINGS | |||
|
Function |
Jumper |
Position | |
|
» |
NPU disabled (80287) |
JP1 |
Open |
|
NPU enabled (80287) |
JP1 |
Closed | |
|
» |
Monitor type select color |
JP3 |
pins 1 & 2 closed |
|
Monitor type select monochrome |
JP3 |
pins 2 & 3 closed | |
|
» |
CMOS memory normal operation |
JP31 |
Open |
|
CMOS memory clear |
JP31 |
Closed | |
|
DRAM CONFIGURATION | ||||
|
Size |
Bank 0 |
Parity 0 |
Bank 1 |
Parity 1 |
|
1MB |
(36) 41256 |
(3) 41256 |
NONE |
(3) 41256 |
|
2MB |
(36) 41256 |
(3) 41256 |
(36) 41256 |
(3) 41256 |
|
4MB |
(36) 44256 |
(3) 41256 |
NONE |
(3) 41256 |
|
8MB |
(36) 44256 |
(3) 41256 |
(36) 44256 |
(3) 41256 |
|
NUMERIC COPROCESSOR CONFIGURATION (80387) | ||
|
Setting |
JP11 |
JP12 |
|
Not installed |
Open |
Open |
|
Installed |
Closed |
Closed |