CORONA COMPUTER CORPORATION
400 HDC
Data bus: 8-bit, ISA
Size: Full-length, full-height card
Hard drives supported: Two MFM ST506 drives
Floppy drives supported: Two 360KB, 720KB, 1.2MB, or 1.44MB
 
| CONNECTIONS | |
| Function | Location | 
| 20-pin data cable connector-drive 1 | CN1 | 
| 20-pin data cable connector-drive 0 | CN2 | 
| 34-pin control cable connector-hard drive | CN3 | 
| DRIVE TYPE COFIGURATION - SW1 | |||||||
| Heads | Cyl. | Switch 1 | Switch 2 | Switch 3 | Switch 4 | Switch 5 | Switch 6 | 
| 2 | 612 | on | off | off | on | on | on | 
| 4 | 306 | on | off | off | off | off | off | 
| 4 | 306 | off | off | off | off | off | off | 
| 4 | 612 | on | on | on | off | off | off |