ZENITH DATA SYSTEMS
Z-2500 SERIES
| 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 | 330mm x 218mm | 
| I/O Options | None | 
| NPU Options | 80287 | 
 
| USER CONFIGURABLE SETTINGS | |||
| Function | Label | Position | |
| » | Factory configured - do not alter | J101 | Open | 
| » | NPU clock mode select mode /3 for 80287, /2 for 80C287 | J103 | Closed | 
| NPU clock mode select direct mode | J103 | Open | |
| Parallel printer decode | J106 | Unidentified | |
| » | ROM DMA blocked | J113 | Pins 1 & 2 closed | 
| ROM DMA not blocked | J113 | Pins 2 & 3 closed | |
| » | Speaker enabled | J114 | Closed | 
| Speaker disabled | J114 | Open | |
| DRAM CONFIGURATION | ||
| Size | Bank 0 | Bank 1 | 
| 1MB | (4) 256K x 9 | None | 
| 3MB | (4) 256K x 9 | (2) 1M x 9 | 
| 6MB | (4) 1M x 9 | (2) 1M x 9 | 
| DRAM TYPE SELECTION | |
| Type | J102 | 
| 256K x 9 in Bank 0 | Pins 2 & 3 closed | 
| 1M x 9 in Banks 0 & 1 | Pins 1 & 2 closed | 
| SCP SPEED SELECTION | ||
| Speed | P113 | |
| 7.16MHz | Pins 1 & 2 closed | |
| » | 8MHz | Pins 5 & 6 closed | 
| 12MHz | Pins 3 & 4 closed | |
| NPU SPEED SELECTION | ||||
| Clock speed | 80287 | 80C287 | P113 | |
| 8MHz | 2.7MHz | 4MHz | Pins 9 & 10 closed | |
| » | 16MHz | 5.3MHz | 8MHz | Pins 13 & 14 closed | 
| 24MHz | 8MHz | 12Hz | Pins 7 & 8 closed | |
| Note: See also J103 setting. | ||||
| POACH SELECTION | |||
| Setting | J115 | J116 | |
| » | POACH 1 chip installed in U169 | Pins 2 & 3 closed | Pins 2 & 3 closed | 
| POACH 7 chip installed in U169 | Pins 1 & 2 closed | Pins 1 & 2 closed | |