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# ELITEGROUP COMPUTER SYSTEMS, INC.
AC 486 PQFP
Processor 80486SX/80487SX/80486DX/80486DX2
Processor Speed 16/20/25/33/50(internal)/66(internal)MHz
Chip Set ACC
Video Chip Set None
Maximum Onboard 32MB
Memory
Maximum Video Memory None
Cache None
BIOS AMI
Dimensions 254mm x 218mm
I/O Options None
NPU Options None
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|------------------+----------+-------------------+----------|
| External battery | J1 | Reset switch | J4 |
|------------------+----------+-------------------+----------|
| Turbo LED | J2 | Speaker | J5 |
|------------------+----------+-------------------+----------|
| Turbo switch | J3 | Power LED & | J6 |
| | | keylock | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Label | Position |
|------------------------------------+-------+---------------|
| | Monitor type select color | JP2 | Pins 2 & 3 |
| | | | closed |
|---+--------------------------------+-------+---------------|
| | Monitor type select monochrome | JP2 | Pins 1 & 2 |
| | | | closed |
|---+--------------------------------+-------+---------------|
| | PQFP CPU disabled | JP3 | Closed |
|---+--------------------------------+-------+---------------|
| | PQFP CPU enabled | JP3 | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 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 SPEED SELECTION |
|------------------------------------------------------------|
| Speed | JP6 | JP7 | JP8 |
|---------------+--------------+--------------+--------------|
| 16MHz | Closed | Closed | Closed |
|---------------+--------------+--------------+--------------|
| 20MHz | Open | Closed | Closed |
|---------------+--------------+--------------+--------------|
| 25MHz | Closed | Open | Closed |
|---------------+--------------+--------------+--------------|
| 33MHz | Closed | Closed | Open |
|---------------+--------------+--------------+--------------|
| 50iMHz | Closed | Open | Closed |
|---------------+--------------+--------------+--------------|
| 66iMHz | Closed | Closed | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE SELECTION |
|------------------------------------------------------------|
| Type | JP4 | JP5 |
|------------+--------------------------+--------------------|
| 80486SX | Pins 2 & 3 closed | Pins 2 & 3 closed |
|------------+--------------------------+--------------------|
| 80487SX | Pins 1 & 2, 3 & 4 closed | Pins 1 & 2 closed |
|------------+--------------------------+--------------------|
| 80486DX | Pins 1 & 2, 3 & 4 closed | Pins 3 & 4 closed |
|------------+--------------------------+--------------------|
| 80486DX2 | Pins 1 & 2, 3 & 4 closed | Pins 3 & 4 closed |
+------------------------------------------------------------+