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 |