UNIDENTIFIED
386DX-25/33 SYSTEM
| Processor | 80386DX | 
| Processor Speed | 25/33MHz | 
| Chip Set | Unidentified | 
| Video Chip Set | Trident | 
| Maximum Onboard Memory | 32MB | 
| Maximum Video Memory | 1MB | 
| Cache | None | 
| BIOS | Phoenix | 
| Dimensions | 378mm x 310mm | 
| I/O Options | Floppy drive interface, game port, IDE interface, parallel port, serial ports (2), VGA port, riser slot, modem connector | 
| NPU Options | 80387DX/3167 | 
 
| CONNECTIONS | |||
| Purpose | Location | Purpose | Location | 
| Game port | CN1 | IDE interface | J24 | 
| VGA port | CN2 | IDE interface LED | J25 | 
| Parallel port | CN3 | Floppy drive interface LED | J26 | 
| Serial port 2 | CN4 | Power LED | J27 | 
| Serial port 1 | CN5 | Floppy drive interface | J28 | 
| Chassis fan power | J4 | Reset switch | J29 | 
| External battery | J10 | Riser slot | SL1 | 
| Modem connector | J23 | ||
| USER CONFIGURABLE SETTINGS | |||
| Function | Label | Position | |
| HDC enabled | J2 | Pins 2 & 3 closed | |
| HDC disabled | J2 | Pins 1 & 2 closed | |
| Game port enabled | J3 | Pins 1 & 2 closed | |
| Game port disabled | J3 | Pins 2 & 3 closed | |
| Monitor type select color | J5 | Closed | |
| Monitor type select monochrome | J5 | Open | |
| Serial port 2 enabled | J6 | Pins 1 & 2 closed | |
| Serial port 2 disabled | J6 | Pins 2 & 3 closed | |
| Parallel port enabled | J7 | Pins 1 & 2 closed | |
| Parallel port disabled | J7 | Pins 2 & 3 closed | |
| Serial port 2 COM select COM2 | J8 | Pins 1 & 2 closed | |
| Serial port 2 COM select COM4 | J8 | Pins 2 & 3 closed | |
| Parallel port LPT select LPT1 | J9 | Pins 1 & 2 closed | |
| Parallel port LPT select LPT2 | J9 | Pins 2 & 3 closed | |
| Serial port 1 enabled | J11 | Pins 1 & 2 closed | |
| Serial port 1 disabled | J11 | Pins 2 & 3 closed | |
| Serial port 1 COM select COM1 | J12 | Pins 1 & 2 closed | |
| Serial port 1 COM select COM3 | J12 | Pins 2 & 3 closed | |
| » | Monitor type select standard | J16 | Pins 1 & 2 closed | 
| Monitor type select non standard monochrome | J16 | Pins 2 & 3 closed | |
| Monitor type select non standard color | J16 | Open | |
| Video mode select interlaced | J19 | Closed | |
| Video mode select non interlaced | J19 | Open | |
| IDE interface enabled | J21 | Pins 1 & 2 closed | |
| IDE interface disabled | J21 | Pins 2 & 3 closed | |
| Floppy drive interface enabled | J22 | Pins 1 & 2 closed | |
| Floppy drive interface disabled | J22 | Pins 2 & 3 closed | |
| DRAM CONFIGURATION | ||
| Size | Bank 0 | Bank 1 | 
| 1MB | (4) 256K x 9 | None | 
| 2MB | (4) 256K x 9 | (4) 256K x 9 | 
| 4MB | (4) 1M x 9 | None | 
| 5MB | (4) 1M x 9 | (4) 256K x 9 | 
| 8MB | (4) 1M x 9 | (4) 1M x 9 | 
| 16MB | (4) 4M x 9 | None | 
| 17MB | (4) 4M x 9 | (4) 256K x 9 | 
| 20MB | (4) 4M x 9 | (4) 1M x 9 | 
| 32MB | (4) 4M x 9 | (4) 4M x 9 | 
| Note: Banks are interchangeable. | ||
| VIDEO MEMORY CONFIGURATION | ||||
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 | 
| 256KB | (2) 44256 | None | None | None | 
| 512KB | (2) 44256 | (2) 44256 | None | None | 
| 1MB | (2) 44256 | (2) 44256 | (2) 44256 | (2) 44256 |