HFDC Hard Disk/Floppy Controller Settings and Configuration

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