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# ARTEK COMPUTER SYSTEMS, INC.
OPTI-495 SX CACHE
Processor 80386DX/80486SX/80487SX/80486DX/80486DX2
Processor Speed 25/33/40/50(internal)/50/66(internal)MHz
Chip Set OPTI
Max. Onboard DRAM 32MB
SRAM Cache 64/128/256KB
BIOS AMI
Dimensions 235mm x 220mm
I/O Options None
NPU Options 80387
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|----------------+----------+---------------------+----------|
| Reset switch | J1 | Speaker | J4 |
|----------------+----------+---------------------+----------|
| Turbo switch | J2 | Power LED & keylock | J5 |
|----------------+----------+---------------------+----------|
| Turbo LED | J3 | External battery | J7 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|--------------------------------------+--------+------------|
| » | CMOS memory normal operation | P1 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | CMOS memory clear | P1 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | Monitor type select color | P2 | closed |
|---+----------------------------------+--------+------------|
| | Monitor type select monochrome | P2 | open |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | P28 | open |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | P39 | open |
| | alter | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 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) 1M x 9 | (4) 256K 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 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Cache | Location | TAG |
|------------+---------------+---------------+---------------|
| 64KB | (8) 8K x 8 | Banks 0 & 1 | (1) 8K x 8 |
|------------+---------------+---------------+---------------|
| 128KB | (4) 32K x 8 | Bank 0 | (1) 8K x 8 |
|------------+---------------+---------------+---------------|
| 256KB | (8) 32K x 8 | Banks 0 & 1 | (1) 32K x 8 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SRAM JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | P3 | P5 | P6 | P7 | P8 | P9 |
|------+-----------------+-------+------+------+------+------|
| 64KB |pins 2 & 3 closed| open | open | open | open | open |
|------+-----------------+-------+------+------+------+------|
|128KB |pins 1 & 2 closed|closed |closed|closed|closed|closed|
|------+-----------------+-------+------+------+------+------|
|256KB |pins 2 & 3 closed|closed |closed|closed|closed|closed|
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU CONFIGURATION |
|------------------------------------------------------------|
| CPU | P4 | P25 | P33 | P100 |
|---------+---------------+------------+--------+------------|
| 80486 | pins 2 & 3 | pins 1 & 2 | closed | pins 2 & 3 |
| (PGA) | closed | closed | | closed |
|---------+---------------+------------+--------+------------|
| 80386 | pins 1 & 2 | pins 2 & 3 | open | pins 1 & 2 |
| (PQFP) | closed | closed | | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 80486 CPU CONFIGURATION |
|------------------------------------------------------------|
| CPU | P12 | P13 | P14 |
|------------------+-------------------+------------+--------|
| 80486DX/80486DX2 | pins 1 & 2 closed | pins 1 & 2 | closed |
| | | closed | |
|------------------+-------------------+------------+--------|
| 80487SX | pins 1 & 2 closed | pins 2 & 3 | closed |
| | | closed | |
|------------------+-------------------+------------+--------|
| 80487SX | pins 2 & 3 closed | pins 2 & 3 | open |
| | | closed | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED CONFIGURATION |
|------------------------------------------------------------|
| Speed | CPU | P30 | P31 | P32 | P97 |
|----------+---------+---------+---------+---------+---------|
| 66iMHz | 80486 | closed | open | closed | closed |
|----------+---------+---------+---------+---------+---------|
| 50MHz | 80486 | closed | closed | open | closed |
|----------+---------+---------+---------+---------+---------|
| 50iMHz | 80486 | open | closed | open | open |
|----------+---------+---------+---------+---------+---------|
| 40MHz | 80386 | open | open | closed | closed |
|----------+---------+---------+---------+---------+---------|
| 33MHz | 80486 | closed | closed | open | open |
|----------+---------+---------+---------+---------+---------|
| 33MHz | 80386 | closed | closed | open | closed |
|----------+---------+---------+---------+---------+---------|
| 25MHz | 80486 | closed | open | closed | open |
+------------------------------------------------------------+