ZENITH DATA SYSTEMS
Z-248/12
| Processor | 80286 | 
| Processor Speed | 12MHz | 
| Chip Set | Unidentified | 
| Video Chip Set | None | 
| Maximum Onboard Memory | 6MB | 
| Maximum Video Memory | None | 
| Cache | None | 
| BIOS | Unidentified | 
| Dimensions | 355mm x 304mm | 
| I/O Options | None | 
| NPU Options | 80287 | 
 
| USER CONFIGURABLE SETTINGS | |||
| Function | Label | Position | |
| » | Factory configured - do not alter | J101 | Unidentified | 
| » | NPU clock mode select /3 | J103 | Closed | 
| NPU clock mode select direct | J103 | Open | |
| » | Factory configured - do not alter | J106 | Unidentified | 
| » | Factory configured - do not alter | J113 | Pins 1 & 2 closed | 
| » | Speaker enabled | J114 | Closed | 
| Speaker disabled | J114 | Open | |
| » | Chip at U-169 is Poach 7 | J115 | Pins 1 & 2 closed | 
| Chip at U-169 is Poach 1 | J115 | Pins 2 & 3 closed | |
| » | Factory configured - do not alter | J116 | Pins 2 & 3 closed | 
| DRAM CONFIGURATION | |||
| Size | Bank 0 | Bank 1 | Bank 2 | 
| 1MB | (2) 256K x 9 | (2) 256K x 9 | None | 
| 3MB | (2) 256K x 9 | (2) 256K x 9 | (2) 1M x 9 | 
| 6MB | (2) 1M x 9 | (2) 1M x 9 | (2) 1M x 9 | 
| DRAM JUMPER CONFIGURATION | |
| Size | J102 | 
| 1MB | Pins 2 & 3 closed | 
| 3MB | Pins 2 & 3 closed | 
| 6MB | Pins 1 & 2 closed | 
| NPU SPEED SELECTION | ||
| Speed | Type | P113 | 
| 6MHz | 80287 | Pins 13 & 14 closed | 
| 8MHz | 80C87 | Pins 13 & 14 closed | 
| 8MHz | 80287 | Pins 7 & 8 closed | 
| 12MHz | 80C87 | Pins 7 & 8 closed |