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.  |