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# DTK COMPUTER, INC.
GRAFIKA 4V2
Processor 80486SX/80487SX/80486DX/80486DX2/Pentium
Overdrive
Processor 20/25/33/40/50(internal)/50/66(internal)MHz
Speed
Chip Set SIS
Max. Onboard 32MB
DRAM
Cache 64/128/256KB
BIOS AMI/Award/DTK
Dimensions 260mm x 220mm
I/O Options 32-bit VESA local bus slots (2)
NPU Options None
(IMG) IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|---------------+----------+----------------------+----------|
| Power LED & | CN1 | Reset switch | CN5 |
| keylock | | | |
|---------------+----------+----------------------+----------|
| Speaker | CN2 | External battery | CN6 |
|---------------+----------+----------------------+----------|
| Turbo switch | CN3 | 32-bit VESA local | SL1 & |
| | | bus slots | SL2 |
|---------------+----------+----------------------+----------|
| Turbo LED | CN4 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|------------------------------------+--------+--------------|
| » | Battery type select external | JP12 | pins 1 & 2 |
| | | | closed |
|---+--------------------------------+--------+--------------|
| | Battery type select internal | JP12 | pins 2 & 3 |
| | | | closed |
|---+--------------------------------+--------+--------------|
| » | CPU type select PGA | JP16 | Closed |
|---+--------------------------------+--------+--------------|
| | CPU type select PQFP | JP16 | Open |
|---+--------------------------------+--------+--------------|
| » | A20 chip supported | JP17 | pins 1 & 2 |
| | | | closed |
|---+--------------------------------+--------+--------------|
| | 8042 chip supported | JP17 | pins 2 & 3 |
| | | | closed |
|---+--------------------------------+--------+--------------|
| » | Monitor type select monochrome | JP18 | Closed |
|---+--------------------------------+--------+--------------|
| | Monitor type select color | JP18 | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|------------------+--------------------+--------------------|
| 1MB | (4) 256K x 9 | NONE |
|------------------+--------------------+--------------------|
| 2MB | (4) 256K x 9 | (4) 256K x 9 |
|------------------+--------------------+--------------------|
| 2MB | (4) 512K x 9 | NONE |
|------------------+--------------------+--------------------|
| 4MB | (4) 1M x 9 | NONE |
|------------------+--------------------+--------------------|
| 4MB | (4) 512K x 9 | (4) 512K x 9 |
|------------------+--------------------+--------------------|
| 6MB | (4) 512K x 9 | (4) 1M x 9 |
|------------------+--------------------+--------------------|
| 8MB | (4) 1M x 9 | (4) 1M x 9 |
|------------------+--------------------+--------------------|
| 8MB | (4) 2M x 9 | NONE |
|------------------+--------------------+--------------------|
| 16MB | (4) 4M x 9 | NONE |
|------------------+--------------------+--------------------|
| 16MB | (4) 2M x 9 | (4) 2M x 9 |
|------------------+--------------------+--------------------|
| 18MB | (4) 512K x 9 | (4) 4M x 9 |
|------------------+--------------------+--------------------|
| 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 (U14) | TAG (U15) |
|-------+-----------+------------+-------------+-------------|
| 64KB | (4) 8K x | (4) 8K x 8 | (1) 8K x 8 | (1) 8K x 8 |
| | 8 | | | |
|-------+-----------+------------+-------------+-------------|
| 128KB | (4) 32K x | NONE | (1) 8K x 8 | (1) 8K x 8 |
| | 8 | | | |
|-------+-----------+------------+-------------+-------------|
| 256KB | (4) 32K x | (4) 32K x | (1) 16K or | (1) 16K or |
| | 8 | 8 | (1) 32K x 8 | (1) 32K x 8 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | JP1 | JP2 | JP3 | JP4 | JP5 | JP6 | JP7 |
|-------+-------+-------+-------+------+------+-------+------|
| 64KB | 1 & 2 | 1 & 2 | 1 & 2 | 1 & | 2 & | Open | 1 & |
| | | | | 2 | 3 | | 2 |
|-------+-------+-------+-------+------+------+-------+------|
| 128KB | 2 & 3 | 1 & 2 | 2 & 3 | 1 & | 1 & | 1 & 2 | 2 & |
| | | | | 2 | 2 | | 3 |
|-------+-------+-------+-------+------+------+-------+------|
| 256KB | 2 & 3 | 2 & 3 | 2 & 3 | 2 & | 2 & | 2 & 3 | 2 & |
| | | | | 3 | 3 | | 3 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION |
|------------------------------------------------------------|
| Type | JP13 | JP14 | JP15 |
|-----------------+----------------+----------------+--------|
| 80486SX | Open | pins 2 & 3 | Open |
| | | closed | |
|-----------------+----------------+----------------+--------|
| 80487SX | pins 2 & 3 | pins 1 & 2 | Closed |
| | closed | closed | |
|-----------------+----------------+----------------+--------|
| 80486DX | pins 1 & 2 | pins 1 & 2 | Closed |
| | closed | closed | |
|-----------------+----------------+----------------+--------|
| 80486DX2 | pins 1 & 2 | pins 1 & 2 | Closed |
| | closed | closed | |
|-----------------+----------------+----------------+--------|
| Pentium | pins 2 & 3 | pins 1 & 2 | Closed |
| Overdrive | closed | closed | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED CONFIGURATION |
|------------------------------------------------------------|
| Speed | JP20 | JP21 | JP22 |
|---------------+--------------+--------------+--------------|
| 20MHz | Open | Open | Open |
|---------------+--------------+--------------+--------------|
| 25MHz | Open | Open | Closed |
|---------------+--------------+--------------+--------------|
| 33MHz | Closed | Closed | Closed |
|---------------+--------------+--------------+--------------|
| 40MHz | Open | Closed | Closed |
|---------------+--------------+--------------+--------------|
| 50iMHz | Open | Open | Closed |
|---------------+--------------+--------------+--------------|
| 50MHz | Closed | Open | Open |
|---------------+--------------+--------------+--------------|
| 66iMHz | Closed | Closed | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VESA WAIT STATE CONFIGURATION |
|------------------------------------------------------------|
| Wait states | JP9 | JP11 |
|--------------------+-------------------+-------------------|
| » | 0 wait states | pins 1 & 2 closed | pins 1 & 2 closed |
|---+----------------+-------------------+-------------------|
| » | 1 wait state | pins 2 & 3 closed | pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VL BUS SPEED CONFIGURATION |
|------------------------------------------------------------|
| CPU speed | JP8 | JP10 |
|------------------+--------------------+--------------------|
| » | <= 33MHz | pins 1 & 2 closed | pins 1 & 2 closed |
|---+--------------+--------------------+--------------------|
| » | > 33MHz | pins 2 & 3 closed | pins 2 & 3 closed |
+------------------------------------------------------------+