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# EVEREX SYSTEMS, INC.
STEP 386 REV. E
Processor 80386DX
Processor Speed 16/20MHz
Chip Set C & T
Max. Onboard DRAM 8MB
Cache 64/128KB
BIOS AMI
Dimensions 355mm x 304mm
I/O Options 32-bit proprietary memory card
NPU Options 80387DX
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location |
|-----------------------------------------+------------------|
| 32-bit proprietary memory card | S1 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper/Switch | Position |
|---------------------------------+---------------+----------|
| » | Factory configured - do not | J1 | Unknown |
| | alter | | |
|---+-----------------------------+---------------+----------|
| » | Factory configured - do not | SW1 | Unknown |
| | alter | | |
|---+-----------------------------+---------------+----------|
| » | NPU enabled | W3 | Closed |
|---+-----------------------------+---------------+----------|
| | NPU disabled | W3 | Open |
|---+-----------------------------+---------------+----------|
| » | 32-bit memory card enabled | W14 | Closed |
|---+-----------------------------+---------------+----------|
| | 32-bit memory card disabled | W14 | Open |
|---+-----------------------------+---------------+----------|
| » | Base memory select 640KB | W16 | Closed |
|---+-----------------------------+---------------+----------|
| | Base memory select 512KB | W16 | Open |
|---+-----------------------------+---------------+----------|
| » | Bus speed select 10MHz | W17 | Closed |
|---+-----------------------------+---------------+----------|
| | Bus speed select 6.7MHz | W17 | Open |
|---+-----------------------------+---------------+----------|
| » | Parity enabled | W20 | Closed |
|---+-----------------------------+---------------+----------|
| | Parity disabled | W20 | Open |
|---+-----------------------------+---------------+----------|
| » | System memory select 2 | W21 | Closed |
| | banks enabled | | |
|---+-----------------------------+---------------+----------|
| | System memory select 1 bank | W21 | Open |
| | enabled | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 | W1 | W15 |
|------+--------+--------+--------+--------+--------+--------|
| 1MB | (4) | NONE | NONE | NONE | Closed | Closed |
| | 256K x | | | | | |
| | 9 | | | | | |
|------+--------+--------+--------+--------+--------+--------|
| 2MB | (4) | (4) | NONE | NONE | Closed | Closed |
| | 256K x | 256K x | | | | |
| | 9 | 9 | | | | |
|------+--------+--------+--------+--------+--------+--------|
| 4MB | (4) 1M | NONE | NONE | NONE | Open | Open |
| | x 9 | | | | | |
|------+--------+--------+--------+--------+--------+--------|
| 4MB | (4) | (4) | (4) | (4) | Closed | Closed |
| | 256K x | 256K x | 256K x | 256K x | | |
| | 9 | 9 | 9 | 9 | | |
|------+--------+--------+--------+--------+--------+--------|
| 8MB | (4) 1M | (4) 1M | NONE | NONE | Open | Open |
| | x 9 | x 9 | | | | |
|------+--------+--------+--------+--------+--------+--------|
| 16MB | (4) 1M | (4) 1M | (4) 1M | (4) 1M | Open | Open |
| | x 9 | x 9 | x 9 | x 9 | | |
|------------------------------------------------------------|
| Note:Banks 2 & 3, and W1 are located on the external |
| memory Board. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Cache | Location | TAG | Dirty Bit |
| | | | | (U38) |
|--------+-----------+------------+---------+----------------|
| 64KB | (8) 16K x | Bank 0 | (2) 16K | (1) 16K x 4 |
| | 4 | | x 4 | |
|--------+-----------+------------+---------+----------------|
| 128KB | (8) 16K x | Bank 0 & 1 | (2) 16K | (1) 16K x 4 |
| | 4 | | x 4 | |
|------------------------------------------------------------|
| Note:Each CACHE bank must be fully populated when its |
| corresponding DRAM bank is populated. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| RESISTOR SIPS CONFIGURATION |
|------------------------------------------------------------|
| Settings | Memory Banks enabled |
|------------------------------------+-----------------------|
| RP27, RP30, RP58, & RP61 installed | Bank 0 |
|------------------------------------+-----------------------|
| RP28, RP31, RP59, & RP62 installed | Bank 0 & 1 |
|------------------------------------+-----------------------|
| RP29, RP32, RP60, & RP63 installed | Banks 0, 1, 2, & 3 |
+------------------------------------------------------------+
IMG IMG 2
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Cache | Location |
|--------------+-------------------------+-------------------|
| 64KB | (8) 16K x 4 | Bank 2 |
|--------------+-------------------------+-------------------|
| 128KB | (8) 16K x 4 | Bank 2 & 3 |
|------------------------------------------------------------|
| Note:Each CACHE bank must be fully populated when its |
| corresponding DRAM bank is populated. |
+------------------------------------------------------------+