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# AMERICAN RESEARCH CORPORATION
PROTURBO 88
Processor 8088
Processor Speed 4.77/9.54MHz
Chip Set None
Max. Onboard 640KB
DRAM
Cache None
BIOS ARC
Dimensions 330mm x 218mm
I/O Options EGA port, floppy drive interface, game port,
parallel port, serial ports (2)
NPU Options 8087
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-------------------+----------+------------------+----------|
| External battery | BAT | Parallel port | CN7 |
|-------------------+----------+------------------+----------|
| Riser card | CN1 | Speaker | CN9 |
|-------------------+----------+------------------+----------|
| Floppy interface | CN2 | Game port | CN10 |
|-------------------+----------+------------------+----------|
| EGA interface | CN3 | Serial port 2 | CN11 |
|-------------------+----------+------------------+----------|
| Serial port 1 | CN6 | External | KB1 |
| | | keyboard | |
|------------------------------------------------------------|
| Note:The location of the CPU, NPU and SW1 are |
| unidentified. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper/Switch | Position |
|-------------------------------+---------------+------------|
| » | Factory configured - do | J2 | unknown |
| | not alter | | |
|---+---------------------------+---------------+------------|
| » | Parallel port select LPT1 | J7 | pins 1 & 2 |
| | interrupt IRQ7 at 378-37F | | closed |
|---+---------------------------+---------------+------------|
| | Parallel port select LPT2 | J7 | pins 3 & 4 |
| | interrupt IRQ5 at 278-27F | | closed |
|---+---------------------------+---------------+------------|
| » | Factory configured - do | J8 | pins 1 & 2 |
| | not alter | | closed |
|---+---------------------------+---------------+------------|
| » | Factory configured - do | J8 | pins 3 & 4 |
| | not alter | | closed |
|---+---------------------------+---------------+------------|
| » | Factory configured - do | J10 | N/A |
| | not alter | | |
|---+---------------------------+---------------+------------|
| » | Factory configured - do | J11 | N/A |
| | not alter | | |
|---+---------------------------+---------------+------------|
| » | Factory configured - do | J12 | N/A |
| | not alter | | |
|---+---------------------------+---------------+------------|
| » | DRAM test at power-on | SW1/1 | Off |
| | enabled | | |
|---+---------------------------+---------------+------------|
| | DRAM test at power-on | SW1/1 | On |
| | disabled | | |
|---+---------------------------+---------------+------------|
| » | NPU disabled | SW1/2 | On |
|---+---------------------------+---------------+------------|
| | NPU enabled | SW1/2 | Off |
+------------------------------------------------------------+
+------------------------------------------------------------+
| FLOPPY DRIVE A CONFIGURATION |
|------------------------------------------------------------|
| Type | SW1/3 | SW1/4 |
|--------------------+-------------------+-------------------|
| None | On | On |
|--------------------+-------------------+-------------------|
| 360KB | On | On |
|--------------------+-------------------+-------------------|
| 720KB | On | Off |
|--------------------+-------------------+-------------------|
| 1.2MB | Off | On |
|--------------------+-------------------+-------------------|
| 1.44MB | Off | Off |
+------------------------------------------------------------+
+------------------------------------------------------------+
| FLOPPY DRIVE B CONFIGURATION |
|------------------------------------------------------------|
| Type | SW1/7 | SW1/8 |
|--------------------+-------------------+-------------------|
| None | On | On |
|--------------------+-------------------+-------------------|
| 360KB | On | On |
|--------------------+-------------------+-------------------|
| 720KB | On | Off |
|--------------------+-------------------+-------------------|
| 1.2MB | Off | On |
|--------------------+-------------------+-------------------|
| 1.44MB | Off | Off |
+------------------------------------------------------------+
+------------------------------------------------------------+
| MONITOR CONFIGURATION |
|------------------------------------------------------------|
| Type | SW1/5 | SW1/6 |
|--------------------+-------------------+-------------------|
| EGA | On | On |
|--------------------+-------------------+-------------------|
| CGA (80 x 25) | On | Off |
|--------------------+-------------------+-------------------|
| CGA (40 x 25) | Off | On |
|--------------------+-------------------+-------------------|
| Monochrome | Off | Off |
+------------------------------------------------------------+