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# INFORMTECH INTERNATIONAL, INC.
IT486SMVG MINI
Processor 80486SX/80487SX/CX486DX/80486DX/ODP486SX
CX486DX2/80486DX2/Pentium Overdrive
Processor Speed 20/25/33/40/50(internal)/50/66(internal)MHz
Chip Set FOREX
Max. Onboard DRAM 64MB
Cache 64/128/256KB
BIOS AMI
Dimensions 330mm x 218mm
I/O Options 32-bit VESA local bus slots (3)
NPU Options None
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|--------------+----------+-----------------------+----------|
| Turbo LED | J6 | External battery | JP1 |
|--------------+----------+-----------------------+----------|
| Speaker | J7 | 32-bit VESA Local bus | S1 |
| | | slot | |
|--------------+----------+-----------------------+----------|
| Turbo switch | J8 | 32-bit VESA Local bus | S2 |
| | | slot | |
|--------------+----------+-----------------------+----------|
| Power LED & | J9 | 32-bit VESA Local bus | S3 |
| keylock | | slot | |
|--------------+----------+-----------------------+----------|
| Reset switch | J10 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|----------------------------------+-----------+-------------|
| ยป | CPU PQFP enabled | JP5 | Open |
|---+------------------------------+-----------+-------------|
| | CPU PQFP disabled | JP5 | 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 |
|------------------+--------------------+--------------------|
| 64MB | (4) 16M x 9 | NONE |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | TAG |
|------------+---------------+---------------+---------------|
| 64KB | (4) 8K x 8 | (4) 8K x 8 | (1) 8K x 8 |
|------------+---------------+---------------+---------------|
| 128KB | (4) 32K x 8 | NONE | (1) 8K x 8 |
|------------+---------------+---------------+---------------|
| 256KB | (4) 32K x 8 | (4) 32K x 8 | (1) 32K x 4 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | JP8A | JP8B | JP8C |
|-------+-----------------+-----------------+----------------|
| 64KB | pins 2 & 3 | pins 1 & 2 | pins 2 & 3 |
| | closed | closed | closed |
|-------+-----------------+-----------------+----------------|
| 128KB | pins 1 & 2 | pins 2 & 3 | pins 1 & 2 |
| | closed | closed | closed |
|-------+-----------------+-----------------+----------------|
| 256KB | pins 1 & 2 | pins 1 & 2 | pins 1 & 2 |
| | closed | closed | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION |
|------------------------------------------------------------|
| Type | JP2 | JP3 | JP4 | JP12 | JP20 |
|---------------+--------+--------+--------+--------+--------|
| 80486SX | pins 2 | pins 2 | pins 2 | pins 1 | N/A |
| | & 3 | & 3 | & 3 | & 2 | |
|---------------+--------+--------+--------+--------+--------|
| 80487SX | pins 2 | pins 1 | pins 1 | pins 1 | N/A |
| | & 3 | & 2 | & 2 | & 2 | |
|---------------+--------+--------+--------+--------+--------|
| CX486DX | N/A | N/A | N/A | N/A | Open |
|---------------+--------+--------+--------+--------+--------|
| 80486DX | pins 1 | pins 1 | pins 1 | pins 1 | N/A |
| | & 2 | & 2 | & 2 | & 2 | |
|---------------+--------+--------+--------+--------+--------|
| 80486DX | pins 2 | pins 2 | pins 2 | pins 1 | N/A |
| (PQFP) | & 3 | & 3 | & 3 | & 2 | |
|---------------+--------+--------+--------+--------+--------|
| ODP486SX | pins 2 | pins 1 | pins 1 | pins 1 | N/A |
| | & 3 | & 2 | & 2 | & 2 | |
|---------------+--------+--------+--------+--------+--------|
| CX486DX2 | N/A | N/A | N/A | N/A | Closed |
|---------------+--------+--------+--------+--------+--------|
| 80486DX2 | pins 1 | pins 1 | pins 1 | pins 1 | N/A |
| | & 2 | & 2 | & 2 | & 2 | |
|---------------+--------+--------+--------+--------+--------|
| Pentium | pins 1 | pins 1 | pins 1 | pins 2 | N/A |
| Overdrive | & 2 | & 2 | & 2 | & 3 | |
|------------------------------------------------------------|
| Note:Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED CONFIGURATION |
|------------------------------------------------------------|
| Speed | JP7A | JP7B | JP7C |
|---------------+--------------+--------------+--------------|
| 20MHz | Open | Closed | Closed |
|---------------+--------------+--------------+--------------|
| 25MHz | N/A | Open | Open |
|---------------+--------------+--------------+--------------|
| 33MHz | Open | Open | Open |
|---------------+--------------+--------------+--------------|
| 40MHz | Closed | Closed | Open |
|---------------+--------------+--------------+--------------|
| 50i MHz | N/A | Open | Open |
|---------------+--------------+--------------+--------------|
| 50MHz | Open | Closed | Open |
|---------------+--------------+--------------+--------------|
| 66i MHz | Open | Open | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VESA WAIT STATE/BUS SPEED CONFIGURATION |
|------------------------------------------------------------|
| CPU speed | Wait states | JP10 | JP11 |
|-----------+---------------+-------------------+------------|
| < 33 MHz | 0 wait states | pins 1 & 2 closed | pins 1 & 2 |
| | | | closed |
|-----------+---------------+-------------------+------------|
| > 33 MHz | 1 wait state | pins 2 & 3 closed | pins 2 & 3 |
| | | | closed |
+------------------------------------------------------------+