UNIDENTIFIED
386-20/25
|
Processor |
80386SX (exact location unidentified) |
|
Processor Speed |
20/25MHz |
|
Chip Set |
Unidentified |
|
Maximum Onboard Memory |
10MB (on external memory card) |
|
Cache |
None |
|
BIOS |
Unidentified |
|
Dimensions |
228mm x 220mm |
|
I/O Options |
External memory card |
|
NPU Options |
80387SX (exact location unidentified) |
|
CONNECTIONS | |||
|
Function |
Label |
Function |
Label |
|
External battery |
X1 |
Turbo LED |
x8 |
|
Reset switch |
X4 |
Speaker |
X17 |
|
Status port |
X5 |
Turbo switch |
X22 |
|
Power LED & keylock |
x6 |
External memory card |
SL1 |
|
USER CONFIGURABLE SETTINGS | |||
|
Setting |
Label |
Position | |
|
» |
Speed select through keyboard |
S1 |
Pins 2 & 3 closed |
|
Speed select through turbo switch |
S1 |
Pins 1 & 2 closed | |
|
» |
I/O slot wait state select 4 wait states |
S2 |
Pins 1 & 2 closed |
|
I/O slot wait state select 6 wait states |
S2 |
Pins 2 & 3 closed | |
|
» |
Factory configured - do not alter |
S5 |
N/A |
|
» |
Factory configured - do not alter |
SW1/1 |
N/A |
|
» |
NPU disabled |
SW1/2 |
Off |
|
NPU enabled |
SW1/2 |
On | |
|
» |
Floppy drive speed does not affect CPU speed |
SW1/3 |
Off |
|
Floppy drive speed at CPU speed 8MHz |
SW1/3 |
On | |
|
» |
Monitor type select monochrome |
SW1/4 |
Off |
|
Monitor type select color |
SW1/4 |
On | |
|
» |
Factory configured - do not alter |
X23 |
N/A |
|
DRAM | ||||
|
Size |
Bank 0 |
Bank 1 |
Bank 2 |
Bank 3 |
|
1MB |
1MB kit |
None |
None |
None |
|
1MB |
1MB kit |
None |
None |
None |
|
2MB |
1MB kit |
None |
1MB kit |
None |
|
2MB |
1MB kit |
None |
1MB kit |
None |
|
4MB |
None |
4MB kit |
None |
None |
|
5MB |
1MB kit |
4MB kit |
None |
None |
|
6MB |
1MB kit |
4MB kit |
1MB kit |
None |
|
6MB |
1MB kit |
4MB kit |
1MB kit |
None |
|
8MB |
None |
4MB kit |
None |
4MB module |
|
9MB |
1MB kit |
4MB kit |
None |
4MB module |
|
10MB |
1MB kit |
4MB kit |
1MB kit |
4MB module |
|
10MB |
1MB kit |
4MB kit |
1MB kit |
4MB module |
|
Note: Banks are located on the external memory card. | ||||
|
DRAM SWITCH | ||||
|
Size |
SW1/5 |
SW1/6 |
SW1/7 |
SW1/8 |
|
1MB |
On |
On |
On |
On |
|
1MB |
On |
On |
On |
Off |
|
2MB |
On |
On |
Off |
On |
|
2MB |
On |
On |
Off |
Off |
|
4MB |
On |
Off |
On |
On |
|
5MB |
On |
Off |
On |
Off |
|
6MB |
On |
Off |
Off |
On |
|
6MB |
On |
Off |
Off |
Off |
|
8MB |
Off |
On |
On |
On |
|
9MB |
Off |
On |
On |
Off |
|
10MB |
Off |
On |
Off |
On |
|
10MB |
Off |
On |
Off |
Off |
|
BIOS | ||
|
Setting |
S3 |
S4 |
|
27128 |
Pins 1 & 2 closed |
Pins 1 & 2 closed |
|
27256 |
Pins 2 & 3 closed |
Pins 1 & 2 closed |
|
27512 |
Pins 2 & 3 closed |
Pins 2 & 3 closed |
|
MISCELLANEOUS TECHNICAL NOTE |
|
The location of pin 1 on all jumpers and the switch is unidentified. |