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# DTK COMPUTER, INC.
PKM-0037S
Processor CX486M6/80486SX/80487SX/80486DX/80486DX2/Pentium
Overdrive
Processor 20/25/33/40/50(internal)/50/66(internal)MHz
Speed
Chip Set Unidentified
Max. Onboard 32MB
DRAM
Cache 64/128/256KB
BIOS Unidentified
Dimensions 254mm x 218mm
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 | | |
|------------------------------------------------------------|
| Note: The location of CN1 - CN6 are unidentified. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|--------------------------------------+--------+------------|
| » | A20 Source type select chip | JP17 | pins 1 & 2 |
| | supported | | closed |
|---+----------------------------------+--------+------------|
| | A20 Source type select 8042 | JP17 | pins 2 & 3 |
| | supported | | closed |
|---+----------------------------------+--------+------------|
| » | Monitor type select color | JP18 | Open |
|---+----------------------------------+--------+------------|
| | Monitor type select monochrome | JP18 | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 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) 512K x 9 | (4) 512K x 9 |
|-----------+------------------------+-----------------------|
| 4MB | (4) 1M x 9 | NONE |
|-----------+------------------------+-----------------------|
| 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) 2M x 9 | (4) 2M 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 1 | TAG 2 |
|-------+---------+---------+-----------------+--------------|
| 64KB | (4) 8K | (4) 8K | (1) 8K x 8 | (1) 8K x 8 |
| | x 8 | x 8 | | |
|-------+---------+---------+-----------------+--------------|
| 128KB | (4) 32K | (4) 32K | (1) 8K x 8 | (1) 8K x 8 |
| | x 8 | x 8 | | |
|-------+---------+---------+-----------------+--------------|
| 256KB | (4) 32K | (4) 32K | (1) 16K x 8 or | (1) 16K x 8 |
| | x 8 | x 8 | (1) 32K x 8 | or (1) 32K x |
| | | | | 8 |
|------------------------------------------------------------|
| Note: The location of TAG 2 is unidentified. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | JP1 | JP2 | JP3 | JP4 |
|-------+-------------+------------+------------+------------|
| 64KB | pins 1 & 2 | pins 1 & 2 | pins 1 & 2 | pins 1 & 2 |
| | closed | closed | closed | closed |
|-------+-------------+------------+------------+------------|
| 128KB | pins 2 & 3 | pins 1 & 2 | pins 2 & 3 | pins 1 & 2 |
| | closed | closed | closed | closed |
|-------+-------------+------------+------------+------------|
| 256KB | pins 2 & 3 | pins 2 & 3 | pins 2 & 3 | pins 2 & 3 |
| | closed | closed | closed | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION (CON’T) |
|------------------------------------------------------------|
| Size | JP5 | JP6 | JP7 |
|-------+-----------------+-----------------+----------------|
| 64KB | pins 2 & 3 | Open | pins 1 & 2 |
| | closed | | closed |
|-------+-----------------+-----------------+----------------|
| 128KB | pins 1 & 2 | pins 1 & 2 | pins 2 & 3 |
| | closed | closed | closed |
|-------+-----------------+-----------------+----------------|
| 256KB | pins 2 & 3 | pins 2 & 3 | pins 2 & 3 |
| | closed | closed | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION |
|------------------------------------------------------------|
| Type | JP13 | JP14 | JP15 |
|-----------------+----------------+----------------+--------|
| CX486M6 | Open | pins 2 & 3 | Open |
| | | closed | |
|-----------------+----------------+----------------+--------|
| 80486SX(PQFP) | Open | pins 2 & 3 | Open |
| | | closed | |
|-----------------+----------------+----------------+--------|
| 80486SX(PGA) | 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 TYPE CONFIGURATION |
|------------------------------------------------------------|
| Type | JP16 | JP27 |
|--------------------+------------------+--------------------|
| CX486M6 | Closed | pins 2 & 3 closed |
|--------------------+------------------+--------------------|
| 80486SX(PQFP) | Open | pins 1 & 2 closed |
|--------------------+------------------+--------------------|
| 80486SX(PGA) | Closed | pins 2 & 3 closed |
|--------------------+------------------+--------------------|
| 80487SX | Closed | pins 1 & 2 closed |
|--------------------+------------------+--------------------|
| 80486DX | Closed | pins 1 & 2 closed |
|--------------------+------------------+--------------------|
| 80486DX2 | Closed | pins 1 & 2 closed |
|--------------------+------------------+--------------------|
| Pentium Overdrive | Closed | pins 1 & 2 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 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 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 |
+------------------------------------------------------------+