UNIDENTIFIED
C1-XT TURBO MODEL 615
| Processor | 8088 | 
| Processor Speed | 4/10MHz | 
| Chip Set | VLSI | 
| Max. Onboard DRAM | 1MB | 
| Cache | None | 
| BIOS | Unidentified | 
| Dimensions | 220mm x 220mm | 
| I/O Options | None | 
| NPU Options | 8087 | 
 
| CONNECTIONS | |||
| Purpose | Location | Purpose | Location | 
| Speaker | JP1 | Reset switch | JP3 | 
| Power LED & keylock | JP2 | ||
| USER CONFIGURABLE SETTINGS | |||
| Function | Switch | Position | |
| » | Parity disabled | SW/1 | On | 
| Paity enabled | SW/1 | Off | |
| » | NPU disabled | SW/2 | On | 
| NPU enabled | SW/2 | Off | |
| » | Turbo enabled | SW1/1 | On | 
| Turbo disabled | SW1/1 | Off | |
| » | RAM wait state select 1 wait state | SW1/2 | On | 
| RAM wait state select 0 wait states | SW1/2 | Off | |
| » | ROM wait state select 1 wait state | SW1/3 | On | 
| ROM wait state select 0 wait states | SW1/3 | Off | |
| » | Memory size select 640KB | SW1/4 | On | 
| Memory size select 1MB | SW1/4 | Off | |
| DRAM CONFIGURATION | |||||
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 | Bank 4 | 
| 512KB | (8) 4164 | NONE | (4) 44256 | NONE | NONE | 
| 640KB | (8) 4164 | (8) 4164 | (4) 44256 | NONE | NONE | 
| 768KB | (8) 4164 | (8) 4164 | (4) 44256 | (2) 44256 | NONE | 
| 1MB | (8) 4164 | (8) 4164 | (4) 44256 | (2) 44256 | (2) 44256 | 
| DRAM PARITY CONFIGURATION | |||||
| Size | Parity 0 | Parity 1 | Parity 2 | Parity 3 | Parity 4 | 
| 512KB | (1) 4164 | NONE | (2) 41256 | NONE | NONE | 
| 640KB | (1) 4164 | (1) 4164 | (2) 41256 | NONE | NONE | 
| 768KB | (1) 4164 | (1) 4164 | (2) 41256 | (1) 41256 | NONE | 
| 1MB | (1) 4164 | (1) 4164 | (2) 41256 | (1) 41256 | (1) 41256 | 
| DRAM SWITCH CONFIGURATION | ||
| Size | SW/3 | SW/4 | 
| 512KB | Off | On | 
| 640KB | On | Off | 
| 768KB | Off | Off | 
| 1MB | Off | Off | 
| VIDEO CONFIGURATION | ||
| Size | SW/5 | SW/6 | 
| Monochrome | Off | Off | 
| CGA | On | Off | 
| EGA | On | On | 
| FLOPPY DRIVE CONFIGURATION | ||
| Drives installed | SW/7 | SW/8 | 
| 1 | On | On | 
| 2 | Off | On |