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# DTK COMPUTER, INC.
PKM-0038S (VER. 1.00)
Processor CX486M6/80486SX/CX486S2/SL80486SX/CX486M7/80486DX/SL80486DX/
80486DX2/SL80486DX2/P24D/Pentium Overdrive
Processor 20/25/33/40/50(internal)/50/66(internal)MHz
Speed
Chip Set Unidentified
Max. 128MB
Onboard
DRAM
Cache 128/256/512KB
BIOS Award
Dimensions 250mm x 220mm
I/O 32-bit VESA local bus slots (3), green PC connector
Options
NPU None
Options
(IMG) IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|--------------+-----------+----------------------+----------|
| Turbo switch | J3 pins 3 | Power LED & keylock | J7 |
| | & 4 | | |
|--------------+-----------+----------------------+----------|
| Turbo LED | J4 | Green PC connector | JP26 |
|--------------+-----------+----------------------+----------|
| Speaker | J5 | 32-bit VESA local | SL1 - |
| | | bus slots | SL3 |
|--------------+-----------+----------------------+----------|
| Reset switch | J6 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|--------------------------------------+--------+------------|
| » | Turbo switch enabled | J3 | pins 3 & 4 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | Turbo switch disabled | J3 | pins 4 & 5 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | CMOS memory normal operation | JP16 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | CMOS memory clear | JP16 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | Monitor type select | JP17 | Open |
| | monochrome/EGA/VGA | | |
|---+----------------------------------+--------+------------|
| | Monitor type select CGA | JP17 | Closed |
|---+----------------------------------+--------+------------|
| » | CPU type select any CPU | JP18 | Open |
| | installed | | |
|---+----------------------------------+--------+------------|
| | CPU type select CX486S2 only | JP18 | Closed |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP19 | pins 1 & 2 |
| | alter | | closed |
|---+----------------------------------+--------+------------|
| » | CPU clock delay select CLKIN | JP20 | pins 2 & 3 |
| | delays CPUCLK | | closed |
|---+----------------------------------+--------+------------|
| | CPU clock delay select CLKIN = | JP20 | pins 1 & 2 |
| | CPUCLK | | closed |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP23 | pins 1 & 2 |
| | alter | | closed |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP27 | Open |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP32 | pins 1 & 2 |
| | alter | | 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 |
|------------------+--------------------+--------------------|
| 17MB | (4) 256K x 9 | (4) 4M x 9 |
|------------------+--------------------+--------------------|
| 20MB | (4) 1M x 9 | (4) 4M x 9 |
|------------------+--------------------+--------------------|
| 32MB | (4) 4M x 9 | (4) 4M x 9 |
|------------------+--------------------+--------------------|
| 64MB | (4) 16M x 9 | NONE |
|------------------+--------------------+--------------------|
| 65MB | (4) 256K x 9 | (4) 16M x 9 |
|------------------+--------------------+--------------------|
| 68MB | (4) 1M x 9 | (4) 16M x 9 |
|------------------+--------------------+--------------------|
| 80MB | (4) 4M x 9 | (4) 16M x 9 |
|------------------+--------------------+--------------------|
| 128MB | (4) 16M x 9 | (4) 16M x 9 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | TAG |
|------------+---------------+---------------+---------------|
| 128KB | (4) 32K x 8 | NONE | (1) 8K x 8 |
|------------+---------------+---------------+---------------|
| 256KB | (4) 32K x 8 | (4) 32K x 8 | (1) 32K x 8 |
|------------+---------------+---------------+---------------|
| 512KB | (4) 128K x 8 | NONE | (1) 32K x 8 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | JP1 | JP2 | JP3 | JP4 |
|-----------+----------+----------+----------------+---------|
| 128KB | 1 & 2 | 1 & 2 | 1 & 2, 3 & 4 | 1 & 2 |
|-----------+----------+----------+----------------+---------|
| 256KB | 2 & 3 | 2 & 3 | 2 & 3, 4 & 5 | 1 & 2 |
|-----------+----------+----------+----------------+---------|
| 512KB | 1 & 2 | 2 & 3 | 1 & 2, 3 & 4 | 2 & 3 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION |
|------------------------------------------------------------|
| Type | JP8 | JP9 | JP10 | JP11 | JP12 |
|------------+-------+--------+-------+-------+--------------|
| CX486M6 | 2 & 3 | Closed | 2 & 3 | Open | 2 & 3, 4 & 5 |
|------------+-------+--------+-------+-------+--------------|
| 80486SX | 2 & 3 | Open | 2 & 3 | Open | Open |
|------------+-------+--------+-------+-------+--------------|
| SL80486SX | 2 & 3 | Open | 2 & 3 | Open | 3 & 4 |
|------------+-------+--------+-------+-------+--------------|
| CX486M7 | 1 & 2 | Closed | 2 & 3 | 2 & 3 | 2 & 3 |
|------------+-------+--------+-------+-------+--------------|
| 80486DX | 1 & 2 | Closed | 2 & 3 | 2 & 3 | Open |
|------------+-------+--------+-------+-------+--------------|
| SL80486DX | 1 & 2 | Closed | 2 & 3 | 2 & 3 | 3 & 4 |
|------------+-------+--------+-------+-------+--------------|
| 80486DX2 | 1 & 2 | Closed | 2 & 3 | 2 & 3 | Open |
|------------+-------+--------+-------+-------+--------------|
| SL80486DX2 | 1 & 2 | Closed | 2 & 3 | 2 & 3 | 3 & 4 |
|------------+-------+--------+-------+-------+--------------|
| P24D | 1 & 2 | Closed | 1 & 2 | 2 & 3 | 1 & 2, 3 & 4 |
|------------+-------+--------+-------+-------+--------------|
| P24T | 1 & 2 | Closed | 1 & 2 | 1 & 2 | 3 & 4 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION (CON’T) |
|------------------------------------------------------------|
| Type | JP13 | JP14 | JP15 | JP21 |
|--------------+---------+---------------+---------+---------|
| CX486M6 | Open | 1 & 2, 3 & 4 | 2 & 3 | 1 & 2 |
|--------------+---------+---------------+---------+---------|
| 80486SX | Open | Open | Open | 2 & 3 |
|--------------+---------+---------------+---------+---------|
| SL80486SX | 1 & 2 | 2 & 3 | 4 & 5 | 2 & 3 |
|--------------+---------+---------------+---------+---------|
| CX486M7 | Open | 1 & 2, 3 & 4 | 2 & 3 | 1 & 2 |
|--------------+---------+---------------+---------+---------|
| 80486DX | Open | Open | Open | 2 & 3 |
|--------------+---------+---------------+---------+---------|
| SL80486DX | 1 & 2 | 2 & 3 | 4 & 5 | 2 & 3 |
|--------------+---------+---------------+---------+---------|
| 80486DX2 | Open | Open | Open | 2 & 3 |
|--------------+---------+---------------+---------+---------|
| SL80486DX2 | 1 & 2 | 2 & 3 | 4 & 5 | 2 & 3 |
|--------------+---------+---------------+---------+---------|
| P24D | 2 & 3 | 2 & 3 | 4 & 5 | 2 & 3 |
|--------------+---------+---------------+---------+---------|
| P24T | Open | 2 & 3 | 1 & 2 | 1 & 2 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION (CON’T) |
|------------------------------------------------------------|
| Type | JP22 | JP24 | JP25 | JP30 | JP31 |
|-------------+---------+---------+--------+--------+--------|
| CX486M6 | 2 & 3 | 2 & 3 | 2 & 3 | Open | Open |
|-------------+---------+---------+--------+--------+--------|
| 80486SX | 1 & 2 | Open | Open | Open | Open |
|-------------+---------+---------+--------+--------+--------|
| SL80486SX | 1 & 2 | Open | Open | Open | Open |
|-------------+---------+---------+--------+--------+--------|
| CX486M7 | 2 & 3 | 2 & 3 | 2 & 3 | Open | Open |
|-------------+---------+---------+--------+--------+--------|
| 80486DX | 1 & 2 | Open | Open | Open | Open |
|-------------+---------+---------+--------+--------+--------|
| SL80486DX | 1 & 2 | Open | Open | Open | Open |
|-------------+---------+---------+--------+--------+--------|
| 80486DX2 | 1 & 2 | Open | Open | Open | Open |
|-------------+---------+---------+--------+--------+--------|
| SL80486DX2 | 1 & 2 | Open | Open | Open | Open |
|-------------+---------+---------+--------+--------+--------|
| P24D | 1 & 2 | Open | 1 & 2 | Closed | Closed |
|-------------+---------+---------+--------+--------+--------|
| P24T | 1 & 2 | 1 & 2 | 1 & 2 | Open | Open |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED CONFIGURATION |
|------------------------------------------------------------|
| Speed | JP5 | JP6 | JP7 |
|---------------+--------------+--------------+--------------|
| 20MHz | Open | Open | Open |
|---------------+--------------+--------------+--------------|
| 25MHz | Open | Closed | Open |
|---------------+--------------+--------------+--------------|
| 33MHz | Closed | Closed | Closed |
|---------------+--------------+--------------+--------------|
| 40MHz | Open | Closed | Closed |
|---------------+--------------+--------------+--------------|
| 50iMHz | Open | Closed | Open |
|---------------+--------------+--------------+--------------|
| 50MHz | Closed | Open | Open |
|---------------+--------------+--------------+--------------|
| 66iMHz | Closed | Closed | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VL BUS WAIT STATE CONFIGURATION |
|------------------------------------------------------------|
| » Wait states | JP28 |
|------------------------------+-----------------------------|
| » | 0 wait states | pins 1 & 2 closed |
|---+--------------------------+-----------------------------|
| » | 1 wait state | pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VL BUS SPEED CONFIGURATION |
|------------------------------------------------------------|
| CPU speed | JP29 |
|----------------------------+-------------------------------|
| <= 33MHz | pins 1 & 2 closed |
|----------------------------+-------------------------------|
| > 33MHz | pins 2 & 3 closed |
+------------------------------------------------------------+