Data bus:	50-pin SCSI interface
Size:	5.75" x 8"
Hard drive supported:	Up to two ST506/412 MFM drives, up to two ST506/412 RLL 2,7 drives, up to two ESDI drives
Floppy drives supported:	Two 360KB, 720KB, 1.2MB, 1.44MB drives or 8"

CONNECTIONS
Function	Location
50-pin SCSI interface	J1
34-pin ESDI or MFM disk control connector	J2
20-pin data cable connector	J3
20-pin data cable connector	J4
34-pin floppy drive connector	J7
DC power connector	J10

SCSI ADDRESS
SCSI ID		W1	W2	W3
»	0	open	open	open
»	1	closed	open	open
»	2	open	closed	open
»	3	closed	closed	open
»	4	open	open	closed
»	5	closed	open	closed
»	6	open	closed	close
»	7	closed	closed	closed

USER CONFIGURABLE SETTINGS
Function		Location	Setting
»	SCSI parity enabled	W4	closed
»	SCSI parity disabled	W4	open
»	Factory configured - do not alter	W5	open
»	ST506/412 interface for drive select 1 enabled	W6	open
»	ESDI interface for drive select 1 enabled	W6	closed
»	ST506/412 interface for drive select 2 enabled	W7	open
»	ESDI interface for drive select 2 enabled	W7	closed
»	TRMPWR supplied by board	W14/pins 1 & 2	closed
»	TRMPWR supplied by SCSI bus	W14/pins 2 & 3	closed
»	Ready signal from pin 2 to FDC 765 disabled	W15	open
»	Ready signal from pin 2 to FDC 765 enabled	W15	closed
»	Ready signal from pin 34 to FDC 765 disabled	W16	open
»	Ready signal from pin 34 to FDC 765 enabled	W16	closed
»	Ready override to FDC 765 disabled (Rev. B only)	W17	open
»	Ready override to FDC 765 enabled (Rev. B only)	W17	closed
»	Motor On signal delay enabled	W18	open
»	Motor On signal enabled	W18	closed
»	Factory configured - do not alter	W37	open
»	Factory configured - do not alter	W38	open
»	Factory configured - do not alter	W39	open
Note: Drive select 1 & 2 refer to the drive select jumper setting on the drive itself and should be set to 1 & 2 respectively. The location of W39 is unidentified.

LUN 0 DISK TYPE CONFIGURATION
Drive Type		W9	W10
»	ST506/412	open	open
»	ESDI	closed	open
»	Removable ST506/412	open	closed
»	Flexible disk	closed	closed

LUN 1 DISK TYPE CONFIGURATION
Drive Type		W12	W13
»	ST506/412	open	open
»	ESDI	closed	open
»	Removable ST506/412	open	closed
»	Flexible disk	closed	closed

LUN 0/1 FLEXIBLE DISK DATA RATE
Data Rate		W8(Lun 0)	W11(Lun 1)
»	250 Kbit	open	open
»	500 Kbit	closed	closed
Note: These settings apply only when W9 & W10 are both closed.

LUN 0/1 SECTOR TYPE CONFIGURATION
Mode		W8(Lun 0)	W11(Lun 1)
»	Soft sector enabled	open	open
»	Hard sector enabled	closed	closed
Note: These settings apply only when drive type is set to ST506/412.