DTC5250CX Hard Disk/Floppy Controller Settings and Configuration

Data bus:	8-bit, ISA
Size:	Full-length, full-height card
Hard drive supported:	Two MFM ST506/412 drives
Floppy drives supported:	Four 360KB, 720KB, 1.2MB, or 1.44MB drives

CONNECTIONS
Function	Location
34-pin control cable connector-floppy drive	J1
34-pin control cable connector-hard drive	J2
20-pin data cable connector - drive 0	J3
20-pin data cable connector - drive 1	J4
34-pin floppy drive cable connector - external	J5

USER CONFIGURABLE SETTINGS
Function		Location	Setting
»	Floppy drive enabled	J6/jumper 3	open
	Floppy drive disabled	J6/jumper 3	closed
»	Floppy drive B: 96 tracks per inch density enabled	J6/jumper 6	closed
	Floppy drive B: 48 tracks per inch density enabled	J6/jumper 6	open
»	Floppy drive A: 96 tracks per inch density enabled	J6/jumper 7	closed
	Floppy drive A: 48 tracks per inch density enabled	J6/jumper 7	open

USER CONFIGURABLE SETTINGS
Function		Location	Setting
»	Floppy drive port address is 3F0-3F7h	SW2/switch 1	off
	Floppy drive port address is 370-377h	SW2/switch 1	on
»	BIOS enabled	SW2/switch 3	on
	BIOS disabled	SW2/switch 3	off
»	BIOS size 16KB	SW2/switch 4	on
	BIOS size 8KB	SW2/switch 4	off

DRIVE TYPE SETTINGS - SW1/SWITCHES 1-8

For settings of SW1 see drive type settings table in document C0061

BIOS ADDRESS
Address		SW2/switch 5	SW2/switch 6	SW2/switch 7	SW2/switch 8
»	C800h	on	off	on	on
	D800h	on	off	off	on
	E800h	on	off	on	off

MISCELLANEOUS TECHNICAL NOTES

SW2/switch 2 is not used. If QIT01B1 EPROM is installed, jumper W1 must be closed, jumpers W2 and W3 must be open. The functions of J6/jumpers 1, 2, 4, 5, and 8 are undocumented.