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# PEAKTRON COMPUTER, INC.
PX-3000 TURBO XT
Processor 8088
Processor Speed 12MHz
Chip Set Peaktron
Max. Onboard DRAM 640KB
Cache None
BIOS Peaktron
Dimensions 218mm x 187mm
I/O Options None
NPU Options 8087
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-------------------+----------+------------------+----------|
| Reset switch | J1 | Turbo switch | J14 |
|-------------------+----------+------------------+----------|
| Keylock | J2 | Turbo LED | J15 |
|-------------------+----------+------------------+----------|
| Speaker | J13 | Power LED | J16 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper/Switch | Position |
|-------------------------------+---------------+------------|
| » | Parity check enabled | P1 | Open |
|---+---------------------------+---------------+------------|
| | Parity check disabled | P1 | Closed |
|---+---------------------------+---------------+------------|
| » | CPU speed select | P2 | pins 1 & 2 |
| | switchable at turbo turbo | | closed |
| | switch | | |
|---+---------------------------+---------------+------------|
| | CPU speed select | P2 | pins 2 & 3 |
| | switchable at keyboard | | closed |
|---+---------------------------+---------------+------------|
| » | Factory configured - do | SW1/1 | N/A |
| | not alter | | |
|---+---------------------------+---------------+------------|
| » | Factory configured - do | SW1/2 | N/A |
| | not alter | | |
|---+---------------------------+---------------+------------|
| » | Factory configured - do | SW1/3 | N/A |
| | not alter | | |
|---+---------------------------+---------------+------------|
| » | Factory configured - do | SW1/4 | N/A |
| | not alter | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | U28 - U29 | U15 - U18 | U19 - | U28 - 31 | U34 |
| | | | U22 | | |
|-------+-----------+-----------+----------+----------+------|
| 256KB | (2) 44256 | NONE | NONE | NONE | NONE |
|-------+-----------+-----------+----------+----------+------|
| 256KB | NONE | (4) 41256 | (4) | NONE | NONE |
| | | | 41256 | | |
|-------+-----------+-----------+----------+----------+------|
| 512KB | NONE | NONE | NONE | (4) | NONE |
| | | | | 44256 | |
|-------+-----------+-----------+----------+----------+------|
| 640KB | NONE | NONE | NONE | (4) | NONE |
| | | | | 44256 | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM PARITY CONFIGURATION |
|------------------------------------------------------------|
| Size | U23 | U43 | U48 |
|-------------+-----------------+----------------+-----------|
| 256KB | (1) 41256 | NONE | NONE |
|-------------+-----------------+----------------+-----------|
| 256KB | (1) 41256 | NONE | NONE |
|-------------+-----------------+----------------+-----------|
| 512KB | (1) 41256 | (1) 41256 | NONE |
|-------------+-----------------+----------------+-----------|
| 640KB | (1) 41256 | (1) 41256 | NONE |
|------------------------------------------------------------|
| Note:One (1) 411000 can be used in location U23 for parity |
| with all memory sizes. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM PARITY JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | P3 | P4 |
|------------------+--------------------+--------------------|
| 256KB | pins 2 & 3 closed | pins 2 & 3 closed |
|------------------+--------------------+--------------------|
| 256KB | pins 2 & 3 closed | pins 2 & 3 closed |
|------------------+--------------------+--------------------|
| 512KB | pins 2 & 3 closed | pins 2 & 3 closed |
|------------------+--------------------+--------------------|
| 640KB | pins 1 & 2 closed | pins 1 & 2 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VIDEO CONFIGURATION |
|------------------------------------------------------------|
| Size | SW1/5 | SW1/6 |
|--------------------+-------------------+-------------------|
| None | On | On |
|--------------------+-------------------+-------------------|
| Color (40 x 20) | Off | On |
|--------------------+-------------------+-------------------|
| Color (80 x 25) | On | Off |
|--------------------+-------------------+-------------------|
| Monochrome | Off | Off |
+------------------------------------------------------------+
+------------------------------------------------------------+
| FLOPPY DRIVE CONFIGURATION |
|------------------------------------------------------------|
| Drives installed | SW1/7 | SW1/8 |
|--------------------+-------------------+-------------------|
| 1 | On | On |
|--------------------+-------------------+-------------------|
| 2 | Off | On |
|--------------------+-------------------+-------------------|
| 3 | On | Off |
|--------------------+-------------------+-------------------|
| 4 | Off | Off |
+------------------------------------------------------------+