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# INFORMTECH INTERNATIONAL, INC.
IT486SLC MINI
Processor 80486SX/80486DX/80486DX2/Pentium Overdrive
Processor Speed 20/25/33/40/50(internal)/50/66(internal)MHz
Chip Set Opti
Max. Onboard DRAM 32MB
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 |
|-------------------+----------+------------------+----------|
| External battery | J1 | Reset switch | S1 |
|-------------------+----------+------------------+----------|
| Power LED & | J21 | 32-bit VESA | SL1 |
| keylock | | Local bus slot | |
|-------------------+----------+------------------+----------|
| Turbo LED | JP12 | 32-bit VESA | SL2 |
| | | Local bus slot | |
|-------------------+----------+------------------+----------|
| Turbo switch | JP13 | 32-bit VESA | SL3 |
| | | Local bus slot | |
|-------------------+----------+------------------+----------|
| Speaker | JP16 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|------------------------------------+--------+--------------|
| » | CMOS memory normal operation | JP1 | pins 2 & 3 |
| | | | closed |
|---+--------------------------------+--------+--------------|
| | CMOS memory clear | JP1 | pins 1 & 2 |
| | | | closed |
|---+--------------------------------+--------+--------------|
| » | Monitor type select color | JP2 | Closed |
|---+--------------------------------+--------+--------------|
| | Monitor type select monochrome | JP2 | Open |
|---+--------------------------------+--------+--------------|
| » | Clock chip installed | JP25 | Open |
|---+--------------------------------+--------+--------------|
| | Clock chip not installed | JP25 | 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 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | TAG (U39) | TAG (U40) |
|-------+-------------+------------+------------+------------|
| 64KB | (4) 8K x 8 | (4) 8K x 8 | (1) 8K x 8 | NONE |
|-------+-------------+------------+------------+------------|
| 128KB | (4) 32K x 8 | NONE | (1) 8K x 8 | NONE |
|-------+-------------+------------+------------+------------|
| 256KB | (4) 32K x 8 | (4) 32K x | (1) 8K x 8 | (1) 8K x 8 |
| | | 8 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | JP3 | JP5 | JP8 | JP9 |
|-------+-----------------+----------------+--------+--------|
| 64KB | pins 2 & 3 | pins 2 & 3 | Open | Open |
| | closed | closed | | |
|-------+-----------------+----------------+--------+--------|
| 128KB | pins 1 & 2 | pins 1 & 2 | Open | Closed |
| | closed | closed | | |
|-------+-----------------+----------------+--------+--------|
| 256KB | pins 2 & 3 | pins 2 & 3 | Closed | Closed |
| | closed | closed | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION |
|------------------------------------------------------------|
| Type | JP6 | JP7 | JP11 |
|-----------------+----------------+----------------+--------|
| 80486SX | pins 2 & 3 | Open | Open |
| | closed | | |
|-----------------+----------------+----------------+--------|
| 80486DX | pins 1 & 2 | pins 1 & 2 | Closed |
| | closed | closed | |
|-----------------+----------------+----------------+--------|
| 80486DX2 | pins 1 & 2 | pins 1 & 2 | Closed |
| | closed | closed | |
|-----------------+----------------+----------------+--------|
| Pentium | pins 1 & 2 | pins 1 & 2 | Closed |
| Overdrive | closed | closed | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED CONFIGURATION |
|------------------------------------------------------------|
| Speed | JP18 | JP19 | JP20 |
|---------------+--------------+--------------+--------------|
| 20MHz | Open | Closed | Closed |
|---------------+--------------+--------------+--------------|
| 25MHz | Closed | Open | Closed |
|---------------+--------------+--------------+--------------|
| 33MHz | Closed | Closed | Open |
|---------------+--------------+--------------+--------------|
| 40MHz | Open | Open | Closed |
|---------------+--------------+--------------+--------------|
| 50iMHz | Closed | Closed | Closed |
|---------------+--------------+--------------+--------------|
| 50MHz | Open | Closed | Open |
|---------------+--------------+--------------+--------------|
| 66iMHz | Closed | Closed | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VESA WAIT STATE/BUS SPEED (ID2 & ID3) CONFIGURATION |
|------------------------------------------------------------|
| CPU speed | Wait states | JP14 | JP17 |
|---------------+------------------+------------+------------|
| < 33MHz | 0 wait states | Open | Open |
|---------------+------------------+------------+------------|
| > 33MHz | 1 wait state | Closed | Closed |
+------------------------------------------------------------+