AMERICAN RESEARCH CORPORATION
PROTURBO 88
| 
 Processor  | 
 8088  | 
| 
 Processor Speed  | 
 4.77/9.54MHz  | 
| 
 Chip Set  | 
 None  | 
| 
 Max. Onboard DRAM  | 
 640KB  | 
| 
 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  | 
| 
 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 keyboard  | 
 KB1  | 
| 
 Note:The location of the CPU, NPU and SW1 are unidentified.  | |||
| 
 USER CONFIGURABLE SETTINGS  | |||
| 
 Function  | 
 Jumper/Switch  | 
 Position  | |
| » | 
 Factory configured - do not alter  | 
 J2  | 
 unknown  | 
| » | 
 Parallel port select LPT1 interrupt IRQ7 at 378-37F  | 
 J7  | 
 pins 1 & 2 closed  | 
| 
 Parallel port select LPT2 interrupt IRQ5 at 278-27F  | 
 J7  | 
 pins 3 & 4 closed  | |
| » | 
 Factory configured - do not alter  | 
 J8  | 
 pins 1 & 2 closed  | 
| » | 
 Factory configured - do not alter  | 
 J8  | 
 pins 3 & 4 closed  | 
| » | 
 Factory configured - do not alter  | 
 J10  | 
 N/A  | 
| » | 
 Factory configured - do not alter  | 
 J11  | 
 N/A  | 
| » | 
 Factory configured - do not alter  | 
 J12  | 
 N/A  | 
| » | 
 DRAM test at power-on enabled  | 
 SW1/1  | 
 Off  | 
| 
 DRAM test at power-on disabled  | 
 SW1/1  | 
 On  | |
| » | 
 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  |