UNIDENTIFIED
SUPER TURBO-XT
| Processor | 8088 (exact location is unknown) | 
| Processor Speed | 4.77/12MHz | 
| Chip Set | Unidentified | 
| Max. Onboard DRAM | 1MB | 
| Cache | None | 
| BIOS | Unidentified | 
| Dimensions | 220mm x 220mm | 
| I/O Options | None | 
| NPU Options | 8087(exact location is unknown) | 
 
| CONNECTIONS | |||
| Purpose | Location | Purpose | Location | 
| Power LED | CN3 | Keylock | CN6 | 
| Reset switch | CN4 | Turbo LED | CN7 | 
| Speaker | CN5 | Turbo switch | CN8 | 
| USER CONFIGURABLE SETTINGS | |||
| Function | Jumper | Position | |
| » | CPU type select NEC V20 | J5 | Closed | 
| CPU type select 8088 | J5 | Open | |
| » | RAM wait state select 0 wait state | J6 | Closed | 
| RAM wait state select 1 wait state | J6 | Open | |
| » | ROM wait state select 0 wait state | J7 | Closed | 
| ROM wait state select 1 wait state | J7 | Open | |
| » | Factory configured - do not alter | J8 | Closed | 
| » | Parity check disabled | SW1/1 | On | 
| Parity check disabled | SW1/1 | Off | |
| » | NPU disabled | SW1/2 | On | 
| NPU enabled | SW1/2 | Off | |
| DRAM CONFIGURATION | |||||
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 | Bank 4 | 
| 256KB | (2) 414256 | NONE | NONE | NONE | NONE | 
| 512KB | (2) 414256 | (2) 414256 | NONE | NONE | NONE | 
| 640KB | (2) 414256 | (2) 414256 | (4) 41464 | NONE | NONE | 
| 1MB | (2) 414256 | (2) 414256 | NONE | (2) 414256 | (2) 414256 | 
| DRAM CONFIGURATION (PARITY) | |||||
| Size | Parity 0 | Parity 1 | Parity 2 | Parity 3 | Parity 4 | 
| 256KB | (1) 41256 | NONE | NONE | NONE | NONE | 
| 512KB | (1) 41256 | (1) 841256 | NONE | NONE | NONE | 
| 640KB | (1) 41256 | (1) 41256 | (2) 4164 | NONE | NONE | 
| 1MB | (1) 41256 | (1) 41256 | NONE | (1) 41256 | (1) 41256 | 
| Note:If SW1 is disabled, parity chips are not needed. | |||||
| DRAM SWITCH CONFIGURATION | ||
| Size | SW1/3 | SW1/4 | 
| 0KB | On | On | 
| 256KB | Off | On | 
| 512KB | Off | On | 
| 640KB | On | Off | 
| 1MB | Off | Off | 
| MONITOR CONFIGURATION | ||
| Type | SW1/5 | SW1/6 | 
| None installed | On | On | 
| Monochrome | Off | Off | 
| VGA (40 x 25) | Off | On | 
| VGA (80 x 25) | On | Off | 
| Note: Without ERSO BIOS 3301 installed. | ||
| MONITOR CONFIGURATION | ||
| Type | SW1/5 | SW1/6 | 
| Monochrome | On | On | 
| VGA (40 x 25) | Off | On | 
| VGA (80 x 25) | On | Off | 
| Note: With ERSO BIOS 3301 installed. | ||
| DISK DRIVE CONFIGURATION | ||
| Drives installed | SW1/7 | SW1/8 | 
| 1 | On | On | 
| 2 | Off | On | 
| 3 | On | Off | 
| 4 | Off | Off |