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# INFORMTECH INTERNATIONAL, INC.
IT486SQ
Processor 80486SX/80487SX/80486DX/ODP486SX/80486DX2
Processor Speed 20/25/33/50(internal)/66(internal)MHz
Chip Set OPTI
Max. Onboard DRAM 32MB
Cache None
BIOS Phoenix
Dimensions 330mm x 218mm
I/O Options None
NPU Options None
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|--------------------+----------+-----------------+----------|
| External battery | J1 | Turbo LED | J5 |
|--------------------+----------+-----------------+----------|
| Keyboard connector | J2A | Power LED & | J19 |
| | | keylock | |
|--------------------+----------+-----------------+----------|
| Reset switch | J3 | Speaker | J20 |
|--------------------+----------+-----------------+----------|
| Turbo switch | J4 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|--------------------------------------+--------+------------|
| » | Monitor type select - CGA, EGA, | JP2 | Closed |
| | VGA | | |
|---+----------------------------------+--------+------------|
| | Monitor type select - monochrome | JP2 | Open |
|---+----------------------------------+--------+------------|
| » | I/O recovery time enabled | JP13 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | I/O recovery time disabled | JP13 | pins 1 & 2 |
| | | | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|------------------+--------------------+--------------------|
| 1MB | (4) 256K x 9 | NONE |
|------------------+--------------------+--------------------|
| 2MB | (4) 256K x 9 | (4) 256K x 9 |
|------------------+--------------------+--------------------|
| 4MB | (4) 1M x 9 | NONE |
|------------------+--------------------+--------------------|
| 5MB | (4) 256K x 9 | (4) 1M x 9 |
|------------------+--------------------+--------------------|
| 8MB | (4) 1M x 9 | (4) 1M x 9 |
|------------------+--------------------+--------------------|
| 16MB | (4) 4M x 9 | NONE |
|------------------+--------------------+--------------------|
| 20MB | (4) 1M x 9 | (4) 4M x 9 |
|------------------+--------------------+--------------------|
| 32MB | (4) 4M x 9 | (4) 4M x 9 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION |
|------------------------------------------------------------|
| CPU Type | JP9 | JP10 | JP11 |
|-----------+-------------------+--------+-------------------|
| 80486SX | pins 1 & 2 closed | Open | Open |
|-----------+-------------------+--------+-------------------|
| 80486DX | pins 2 & 3 closed | Closed | pins 2 & 3 closed |
|-----------+-------------------+--------+-------------------|
| P24 | pins 2 & 3 closed | Closed | pins 1 & 2 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SYSTEM CLOCK CONFIGURATION |
|------------------------------------------------------------|
| System Clock | JP5 |
|----------------------------------------+-------------------|
| 20MHz | pins 1 & 2 closed |
|----------------------------------------+-------------------|
| Half of alternative oscillator | pins 2 & 3 closed |
| frequency at OSC3 | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| UPGRADE PROCESSOR TYPE CONFIGURATION |
|------------------------------------------------------------|
| Upgrade processor | JP6 | JP7 |
|--------------------+-------------------+-------------------|
| 80486DX | pins 2 & 3 closed | pins 2 & 3 closed |
|--------------------+-------------------+-------------------|
| 80487SX or other | pins 1 & 2 closed | pins 1 & 2 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| EXTERNAL BATTERY CONFIGURATION |
|------------------------------------------------------------|
| Battery type | JP3 |
|-------------------------------+----------------------------|
| 3.6V Lithium battery ** | pins 1 & 2 closed |
|-------------------------------+----------------------------|
| 4.5V Alkaline Battery | pins 2 & 4 closed |
|-------------------------------+----------------------------|
| 6V (4 AA) Battery pack | pins 3 & 4 closed |
|-------------------------------+----------------------------|
| 6V Battery pack ** | pins 1 & 3 closed |
|------------------------------------------------------------|
| Note:** with internal series current limiting resistor. |
+------------------------------------------------------------+