EVEREX SYSTEMS, INC.
STEP 386CX
| Processor | 80286/80386SX | 
| Processor Speed | Unidentified | 
| Chip Set | Unidentified | 
| Video Chip Set | None | 
| Maximum Onboard Memory | 8MB | 
| Maximum Video Memory | None | 
| Cache | None | 
| BIOS | Unidentified | 
| Dimensions | 254mm x 218mm | 
| I/O Options | Parallel port, serial ports (2), Instep Board connector | 
| NPU Options | 80287/80387SX | 
 
| CONNECTIONS | |||
| Purpose | Location | Purpose | Location | 
| Serial port 1 | CN1 | Parallel port | CN3 | 
| Serial port 2 | CN2 | Instep Board connector | CN4 | 
| USER CONFIGURABLE SETTINGS | |||
| Function | Label | Position | |
| IDE interface enabled | J4 | Open | |
| IDE interface disabled | J4 | Closed | |
| DRAM CONFIGURATION | ||||
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 | 
| 512KB | (2) 256K x 9 | None | None | None | 
| 1MB | (2) 256K x 9 | (2) 256K x 9 | None | None | 
| 2MB | (2) 1M x 9 | None | None | None | 
| 2.5MB | (2) 256K x 9 | (2) 1M x 9 | None | None | 
| 2.5MB | (2) 1M x 9 | (2) 256K x 9 | None | None | 
| 4MB | (2) 1M x 9 | (2) 1M x 9 | None | None | 
| 6MB | (2) 1M x 9 | (2) 1M x 9 | (2) 1M x 9 | None | 
| 8MB | (2) 1M x 9 | (2) 1M x 9 | (2) 1M x 9 | (2) 1M x 9 | 
| SERIAL PORT 1 INTERRUPT SELECTION | ||
| IRQ | JP2 | |
| IRQ3 | Pins 9 & 10 closed | |
| » | IRQ4 | Pins 11 & 12 closed | 
| SERIAL PORT 2 INTERRUPT SELECTION | ||
| IRQ | JP2 | |
| » | IRQ3 | Pins 5 & 6 closed | 
| IRQ4 | Pins 7 & 8 closed | |
| PARALLEL PORT INTERRUPT SELECTION | ||
| IRQ | JP2 | |
| IRQ5 | Pins 3 & 4 closed | |
| » | IRQ7 | Pins 1 & 2 closed | 
| HANDSHAKE SELECTION (PORT 1) | |
| Setting | JP3 | 
| Enabled | 1 & 2, 4 & 5, 7 & 8, 10 & 11 | 
| Disabled | 2 & 3, 5 & 6, 8 & 9, 11 & 12 | 
| Note: Pins designated should be in the closed position. | |
| HANDSHAKE SELECTION (PORT 2) | |
| Setting | JP4 | 
| Enabled | 1 & 2, 4 & 5, 7 & 8, 10 & 11 | 
| Disabled | 2 & 3, 5 & 6, 8 & 9, 11 & 12 | 
| Note: Pins designated should be in the closed position. | |
| DTE/DCE SELECTION (PORT 1) | |
| Setting | JP5 | 
| DTE | 1 & 2, 3 & 4, 5 & 6, 7 & 8, 9 & 10, 11 & 12 | 
| DCE | 1 & 3, 2 & 4, 5 & 7, 6 & 8, 9 & 11, 12 & 14 | 
| Note: Pins designated should be in the closed position. | |
| DTE/DCE SELECTION (PORT 2) | |
| Setting | JP6 | 
| DTE | 1 & 2, 3 & 4, 5 & 6, 7 & 8, 9 & 10, 11 & 12 | 
| DCE | 1 & 3, 2 & 4, 5 & 7, 6 & 8, 9 & 11, 12 & 14 | 
| Note: Pins designated should be in the closed position. | |
 
| MISCELLANEOUS TECHNICAL NOTE | 
| To upgrade to an 80386SX processor, install 80386SX Instep Board at CN4. |