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 |