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. |