INFORMTECH INTERNATIONAL, INC.
IT386
|
Processor |
80386SX |
|
Processor Speed |
25/33MHz |
|
Chip Set |
TI |
|
Max. Onboard DRAM |
16MB (12MB on external memory card) |
|
Cache |
32KB |
|
BIOS |
Phoenix |
|
Dimensions |
318mm x 220mm |
|
I/O Options |
Auxiliary keyboard connector, external memory card (IT-FEM386) |
|
NPU Options |
80387SX/3167 |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
Turbo switch |
J8 |
Power LED & keylock |
P5 |
|
Turbo LED |
P2 |
Auxiliary keyboard connector |
P20 |
|
Speaker |
P3 |
External battery |
P22 |
|
Reset switch |
P4 |
External memory card |
SL1 |
|
USER CONFIGURABLE SETTINGS | |||
|
Function |
Jumper/Switch |
Position | |
|
|
Turbo enabled |
J8 |
Open |
|
Turbo disabled |
J8 |
Closed | |
|
|
AT bus clock speed select 8MHz |
J14 |
pins 2 & 3 closed |
|
AT bus clock speed select 12MHz |
J14 |
pins 1 & 2 closed | |
|
|
Power good signal detect from power supply |
J18 |
pins 1 & 2 closed |
|
Power good signal detect from board |
J18 |
pins 2 & 3 closed | |
|
|
External memory card not installed |
J25 |
pins 1 & 2 closed |
|
External memory card installed |
J25 |
pins 2 & 3 closed | |
|
|
80387 disabled (Weitek 3167 is auto detected) |
SW1/1 |
Off |
|
80387 enabled (Weitek 3167 is auto detected) |
SW1/1 |
On | |
|
|
Monitor type select monochrome |
SW1/2 |
Off |
|
Monitor type select color/EGA/VGA |
SW1/2 |
On | |
|
DRAM CONFIGURATION | |
|
Size |
Bank 0 |
|
1MB |
(4) 256K x 9 |
|
4MB |
(4) 1M x 9 |
|
DRAM JUMPER CONFIGURATION | |||
|
Size |
J1 |
J12 |
J13 |
|
1MB |
pins 1 & 2 closed |
pins 2 & 3 closed |
pins 2 & 3 closed |
|
4MB |
pins 2 & 3 closed |
pins 1 & 2 closed |
pins 1 & 2 closed |
|
CACHE CONFIGURATION |
|
Note: 32KB cache is factory installed and is not configurable. The location is unidentified. |
|
DRAM SPEED CONFIGURATION | ||
|
CPU speed |
DRAM speed |
J7 |
|
25MHz |
120ns |
Closed |
|
25MHz |
100ns |
Open |
|
33MHz |
100ns |
Closed |
|
33MHz |
80ns |
Open |
|
CPU SPEED CONFIGURATION | |||||
|
CPU speed |
NPU speed |
J4 |
J5 |
J6 |
J9 |
|
25MHz |
20MHz |
2 & 3 |
1 & 3, 2 & 4 |
2 & 3 |
2 & 3 |
|
25MHz |
25MHz |
2 & 3 |
2 & 4 |
1 & 2 |
2 & 3 |
|
33MHz |
25MHz |
1 & 2 |
1 & 2 |
2 & 3 |
1 & 2 |
|
33MHz |
33MHz |
1 & 2 |
Open |
1 & 2 |
1 & 2 |
|
Note: Pins designated should be in the closed position. | |||||
|
I/O MODE CONFIGURATION | ||||
|
I/O bus mode |
I/O wait state 8-bit |
I/O wait state 16-bit |
SW1/3 |
SW1/4 |
|
1 |
4 |
1 |
On |
On |
|
2 |
6 |
2 |
Off |
On |
|
3 |
8 |
3 |
On |
Off |
|
4 |
10 |
4 |
Off |
Off |
|
BATTERY TYPE CONFIGURATION | |
|
Type |
J19 |
|
4.5v |
pins 3 & 4 closed |
|
3.6 - 4.5v |
pins 1 & 3 closed |
|
6v (without internal current limiting resistor) |
pins 1 & 2 closed |
|
6v (with internal current limiting resistor) |
pins 2 & 4 closed |