AUVA COMPUTER, INC.
HFDC
| 
 
  | |
| 
 Data bus:  | 
 16-bit ISA  | 
| 
 Size:  | 
 Three-quarter length, full-height card  | 
| 
 Hard drive supported:  | 
 Two MFM ST-506/412 drives  | 
| 
 Floppy drives supported:  | 
 Two 360KB, 720KB, 1.2MB, or 1.44MB drives  | 
| 
 CONNECTIONS  | |
| 
 Function  | 
 Location  | 
| 
 20-pin data cable connector - drive 1  | 
 J1  | 
| 
 20-pin data cable connector - drive 0  | 
 J2  | 
| 
 34-pin control cable connector - hard drive  | 
 J3  | 
| 
 34-pin control cable connector - floppy drive  | 
 J4  | 
| 
 4-pin connector - drive active LED  | 
 JP1  | 
| 
 USER CONFIGURABLE SETTINGS  | |||
| 
 Function  | 
 Location  | 
 Setting  | |
| » | 
 Floppy drive primary address is 3F2h  | 
 J5  | 
 pins 2 & 3 closed  | 
| 
 Floppy drive secondary address is 372h  | 
 J5  | 
 pins 1 & 2 closed  | |
| » | 
 Hard drive primary address is 1F0h  | 
 J6  | 
 pins 2 & 3 closed  | 
| 
 Hard drive secondary address is 170h  | 
 J6  | 
 pins 1 & 2 closed  | |
| » | 
 Floppy drive dual speed disabled  | 
 JP2  | 
 open  | 
| 
 Floppy drive dual speed enabled  | 
 JP2  | 
 closed  | |
| » | 
 Floppy precompensate is ±  | 
 JP3  | 
 open  | 
| 
 Floppy precompensate is 187ns  | 
 JP3  | 
 closed  | |