DTC520DB Hard Disk/Floppy Controller Settings and Configuration

Data Bus	SASI
Card Size	146 x 203mm
Hard Drives Supported	Two ST506/412-MFM devices
Floppy Drives Supported	Four 360KB drives

CONNECTIONS
Function	Label	Function	Label
50-pin SASI connector - to SASI controller	J1	20-pin hard drive data cable	J4
34-pin hard drive control cable	J2	34-pin cable connector - floppy drive	J7
20-pin hard drive data cable	J3	4-pin DC power in	J10

USER CONFIGURABLE SETTINGS
Setting		Label	Position
»	SASI bus terminated	T1	Installed
	SASI bus not terminated	T1	Not installed
»	SASI bus parity enabled	W1	Pins 1 & 2 closed
	SASI bus parity disabled	W1	Pins 2 & 3 closed
»	Logical Unit Number 0 is assigned to hard drive	W5	Open
	Logical Unit Number 0 is assigned to floppy drive	W5	Closed
»	Logical Unit Number 1 is assigned to floppy drive	W6	Closed
	Logical Unit Number 1 is assigned to hard drive	W6	Open
»	Factory configured - do not alter	W7	Closed
»	Factory configured - do not alter	W8	Closed
»	Motor On signal normal	W14	Open
	Motor On signal forced high	W14	Closed
»	Floppy drive not always considered ready	W15	Open
	Floppy drive always considered ready	W15	Closed
»	Factory configured - do not alter	W31	Open
»	Factory configured - do not alter	W32	Pins 1 & 2 closed

SASI BUS ADDRESS SELECTION
Setting		W0/A	W0/B	W0/C	W0/D	W0/E	W0/F	W0/G	W0/H
»	0	Closed	Open	Open	Open	Open	Open	Open	Open
	1	Open	Closed	Open	Open	Open	Open	Open	Open
	2	Open	Open	Closed	Open	Open	Open	Open	Open
	3	Open	Open	Open	Closed	Open	Open	Open	Open
	4	Open	Open	Open	Open	Closed	Open	Open	Open
	5	Open	Open	Open	Open	Open	Closed	Open	Open
	6	Open	Open	Open	Open	Open	Open	Closed	Open
	7	Open	Open	Open	Open	Open	Open	Open	Closed

SECTOR SIZE SELECTION
Setting		W3	W4
	128 bytes	Open	Open
»	256 bytes	Closed	Open
	512 bytes	Open	Closed
	1024 bytes	Closed	Closed