(TXT) View Source
# INFORMTECH INTERNATIONAL, INC.
IT486EX VER. 1
Processor 80486SX/80486DX
Processor Speed 25/33MHz
Chip Set Intel
Max. Onboard DRAM 64MB
Cache 64/128KB (with external cache card)
BIOS Phoenix
Dimensions 330mm x 218mm
I/O Options None
NPU Options 4167
(IMG) IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|----------------+----------+---------------------+----------|
| Turbo switch | P1 | Reset switch | P4 |
|----------------+----------+---------------------+----------|
| Turbo LED | P2 | Power LED & keylock | P5 |
|----------------+----------+---------------------+----------|
| Speaker | P3 | External battery | P20 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper/Switch | Position |
|---------------------------------+---------------+----------|
| » | Cache write protect | J5 | Closed |
| | disabled | | |
|---+-----------------------------+---------------+----------|
| | Cache write protect enabled | J5 | Open |
|---+-----------------------------+---------------+----------|
| » | On board DRAM access | J8 | Closed |
| | enabled | | |
|---+-----------------------------+---------------+----------|
| | On board DRAM access | J8 | Open |
| | disabled | | |
|---+-----------------------------+---------------+----------|
| » | I/O recovery time select | J16 | Closed |
| | 8-bit = 11BLCK, 16-bit = | | |
| | 3BLCK | | |
|---+-----------------------------+---------------+----------|
| | No recovery time | J16 | Open |
|---+-----------------------------+---------------+----------|
| » | 80486 internal cache | J17 | Closed |
| | enabled | | |
|---+-----------------------------+---------------+----------|
| | 80486 internal cache | J17 | Open |
| | disabled | | |
|---+-----------------------------+---------------+----------|
| » | Turbocache486 enabled | J20 | Closed |
|---+-----------------------------+---------------+----------|
| | Turbocache486 disabled | J20 | Open |
|---+-----------------------------+---------------+----------|
| » | BIOS duplicated (to | J36 | Closed |
| | 00FF0000 hex) | | |
|---+-----------------------------+---------------+----------|
| | BIOS not duplicated | J36 | Open |
|---+-----------------------------+---------------+----------|
| » | Turbo mode enabled | P1 | Open |
|---+-----------------------------+---------------+----------|
| | Turbo mode disabled | P1 | Closed |
|---+-----------------------------+---------------+----------|
| » | Factory configured - do not | SW1/7 | Off |
| | alter | | |
|---+-----------------------------+---------------+----------|
| » | Monitor type select | SW1/8 | Off |
| | monochrome | | |
|---+-----------------------------+---------------+----------|
| | Monitor type select color | SW1/8 | On |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|------+-------------+-------------+------------+------------|
| 2MB | (4) 256K x | (4) 256K x | NONE | NONE |
| | 9 | 9 | | |
|------+-------------+-------------+------------+------------|
| 4MB | (4) 256K x | (4) 256K x | (4) 256K x | (4) 256K x |
| | 9 | 9 | 9 | 9 |
|------+-------------+-------------+------------+------------|
| 8MB | (4) 1M x 9 | (4) 1M x 9 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 10MB | (4) 256K x | (4) 256K x | (4) 1M x 9 | (4) 1M x 9 |
| | 9 | 9 | | |
|------+-------------+-------------+------------+------------|
| 10MB | (4) 1M x 9 | (4) 1M x 9 | (4) 256K x | (4) 256K x |
| | | | 9 | 9 |
|------+-------------+-------------+------------+------------|
| 16MB | (4) 1M x 9 | (4) 1M x 9 | (4) 1M x 9 | (4) 1M x 9 |
|------+-------------+-------------+------------+------------|
| 32MB | (4) 4M x 9 | (4) 4M x 9 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 34MB | (4) 4M x 9 | (4) 4M x 9 | (4) 256K x | (4) 256K x |
| | | | 9 | 9 |
|------+-------------+-------------+------------+------------|
| 34MB | (4) 256K x | (4) 256K x | (4) 4M x 9 | (4) 4M x 9 |
| | 9 | 9 | | |
|------+-------------+-------------+------------+------------|
| 40MB | (4) 4M x 9 | (4) 4M x 9 | (4) 1M x 9 | (4) 1M x 9 |
|------+-------------+-------------+------------+------------|
| 40MB | (4) 1M x 9 | (4) 1M x 9 | (4) 4M x 9 | (4) 4M x 9 |
|------+-------------+-------------+------------+------------|
| 64MB | (4) 4M x 9 | (4) 4M x 9 | (4) 4M x 9 | (4) 4M x 9 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| MEMORY BANK CONFIGURATION (BANK 0 & 1) |
|------------------------------------------------------------|
| SIMM Type | SW1/1 | SW1/2 |
|------------------------+-----------------+-----------------|
| No memory installed | Off | Off |
|------------------------+-----------------+-----------------|
| 256KB | On | Off |
|------------------------+-----------------+-----------------|
| 1MB | Off | On |
|------------------------+-----------------+-----------------|
| 4MB | On | On |
+------------------------------------------------------------+
+------------------------------------------------------------+
| MEMORY BANK CONFIGURATION (BANK 2 & 3) |
|------------------------------------------------------------|
| SIMM Type | SW1/3 | SW1/4 |
|------------------------+-----------------+-----------------|
| No memory installed | Off | Off |
|------------------------+-----------------+-----------------|
| 256KB | On | Off |
|------------------------+-----------------+-----------------|
| 1MB | Off | On |
|------------------------+-----------------+-----------------|
| 4MB | On | On |
+------------------------------------------------------------+
+------------------------------------------------------------+
| MEMORY SPEED/CPU MHZ CONFIGURATION (25MHZ) |
|------------------------------------------------------------|
| SIMM Type | SW1/5 | SW1/6 |
|-----------------------------+---------------+--------------|
| 256KB | Off | Off |
|-----------------------------+---------------+--------------|
| 1MB | On | On |
|-----------------------------+---------------+--------------|
| 4MB | On | On |
|------------------------------------------------------------|
| Note: SW1/5 corresponds to Banks 0 & 1 and SW1/6 |
| corresponds to Banks 2 & 3. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| MEMORY SPEED/CPU MHZ CONFIGURATION (33MHZ) |
|------------------------------------------------------------|
| SIMM Type | SW1/5 | SW1/6 |
|-----------------------------+---------------+--------------|
| 256KB | Off | Off |
|-----------------------------+---------------+--------------|
| 1MB | On | On |
|-----------------------------+---------------+--------------|
| 4MB | Off | Off |
|------------------------------------------------------------|
| Note: SW1/5 corresponds to Banks 0 & 1 and SW1/6 |
| corresponds to Banks 2 & 3. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| TURBOCACHE486 CONFIGURATION |
|------------------------------------------------------------|
| Module | J17 | J18 | J19 |
|---------------+--------------+--------------+--------------|
| 82485ES | Open | Open | Open |
|---------------+--------------+--------------+--------------|
| 82485MA/MB | Closed | Closed | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| TURBOCACHE486 JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Module | J1 | J2 | J29 | J63 |
|------------+-----------+-----------+-----------+-----------|
| 82485ES | Open | Open | Open | Open |
|------------+-----------+-----------+-----------+-----------|
| 82485MA/MB | Closed | Closed | Closed | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED CONFIGURATION |
|------------------------------------------------------------|
| Speed | J3 | J15 |
|-------------------+--------------------+-------------------|
| 25MHz | pins 2 & 3 closed | Closed |
|-------------------+--------------------+-------------------|
| 33MHz | pins 1 & 2 closed | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BATTERY TYPE CONFIGURATION |
|------------------------------------------------------------|
| Battery type | J64 |
|----------------------------------------+-------------------|
| 4.5V (without internal current | pins 3 & 4 closed |
| limiting resistor) | |
|----------------------------------------+-------------------|
| 3.6V-4.5V (with internal current | pins 1 & 3 closed |
| limiting resistor) | |
|----------------------------------------+-------------------|
| 6V (without internal current limiting | pins 2 & 4 closed |
| resistor) | |
|----------------------------------------+-------------------|
| 6V (with internal current limiting | pins 1 & 2 closed |
| resistor) | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BIOS CONTROL CONFIGURATION |
|------------------------------------------------------------|
| ROM type | J25 | J35 |
|--------------------+-------------------+-------------------|
| 28F512 | Closed | Closed |
|--------------------+-------------------+-------------------|
| 28F010 | Closed | Open |
|--------------------+-------------------+-------------------|
| 27C512 | Open | Closed |
|--------------------+-------------------+-------------------|
| 27C010 | Open | Open |
+------------------------------------------------------------+