UNIDENTIFIED
B158
| Processor | V 20 (exact location unidentified) | 
| Processor Speed | 4MHz | 
| Chip Set | Unidentified | 
| Video Chip Set | None | 
| Maximum Onboard Memory | 1MB | 
| Maximum Video Memory | None | 
| Cache | None | 
| BIOS | NEL | 
| Dimensions | 254mm x 218mm | 
| I/O Options | None | 
| NPU Options | 8087 (exact location unidentified) | 
 
| CONNECTIONS | |||
| Purpose | Location | Purpose | Location | 
| Keylock | J1 | Turbo LED | J4 | 
| Speaker | J2 | Turbo switch | J5 | 
| Power LED | J3 | Reset switch | J6 | 
| USER CONFIGURABLE SETTINGS | |||
| Function | Label | Position | |
| DRAM parity check disabled | SWA/1 | On | |
| DRAM parity check enabled | SWA/1 | Off | |
| » | Factory configured - do not alter | SWA/2 | On | 
| DRAM CONFIGURATION | |||||||
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 2A | Bank 3 | Bank 3A | Bank 4 | 
| 512KB | (9) 41256 | (9) 41256 | None | None | None | None | None | 
| 640KB | (9) 41256 | (9) 41256 | (2) 4464 | (1) 4164 | (2) 4464 | (1) 4164 | None | 
| 1MB | None | None | None | None | None | None | (9) 411000 | 
| DRAM JUMPER/SWITCH CONFIGURATION | |||
| Size | JP1 | SWA/3 | SWA/4 | 
| None | Closed | On | On | 
| 512KB | Closed | Off | On | 
| 640KB | Closed | On | Off | 
| 1MB | Open | Off | Off | 
| MONITOR SELECTION | ||
| Setting | SWA/5 | SWA/6 | 
| None | On | On | 
| Monochrome | Off | Off | 
| Color 40 x 25 | Off | On | 
| Color 80 x 25 | On | Off | 
| FLOPPY DRIVE SELECTION | ||
| Drives installed | SWA/7 | SWA/8 | 
| 1 | On | On | 
| 2 | Off | On | 
| 3 | On | Off | 
| 4 | Off | Off |