NDC 5027 Hard Disk/Floppy Controller Settings and Configuration

NCL AMERICA

NDC 5027

Data bus: 8-bit, ISA

Size: Half-length, full-height card

Hard drives supported: Two MFM ST506/412

Floppy drives supported: None

CONNECTIONS
Functions
Location
34-pin control cable connector-hard drive
CN1
20-pin data cable connector-drive 0
CN2
20-pin data cable connector-drive 1
CN3

USER CONFIGURABLE SETTINGS
Function
Location
Setting
»
Factory configured - do not alter
JP1/all
N/A
»
Recalibration speed is fast or normal
JP4
open

Recalibration speed is slow
JP4
closed
»
Supports up to 8 heads
JP6
pins 1 & 2 closed

Supports up to 16 heads
JP6
pins 2 & 3 closed

BIOS DRIVE TYPE TABLE FOR THE NCL5027 - SW1
Hd/Cyl
#
1
2
3
4
5
6
7
8
7/699
1
on
on
on
off
N/A
N/A
N/A
on
6/612
1
on
on
off
off
N/A
N/A
N/A
off

2
N/A
N/A
N/A
off
on
on
off
off
4/640
1
on
off
on
off
N/A
N/A
N/A
off

2
N/A
N/A
N/A
off
on
off
on
off
4/612
1
on
off
on
off
N/A
N/A
N/A
off

2
N/A
N/A
N/A
off
on
off
on
off
2/612
1
off
on
on
off
N/A
N/A
N/A
off

2
N/A
N/A
N/A
off
off
on
on
off
2/306
1
off
on
off
off
N/A
N/A
N/A
off

2
N/A
N/A
N/A
off
off
on
off
off
4/320
1
off
off
on
off
N/A
N/A
N/A
off

2
N/A
N/A
N/A
off
off
off
on
off
4/306
1
off
off
off
off
N/A
N/A
N/A
off

2
N/A
N/A
N/A
off
off
off
off
off
6/640
1
on
on
on
on
N/A
N/A
N/A
off

2
N/A
N/A
N/A
on
on
on
on
off
5/733
1
on
on
off
on
N/A
N/A
N/A
off

2
N/A
N/A
N/A
on
on
on
off
off
7/733
1
on
off
on
on
N/A
N/A
N/A
on
5/830
1
on
off
off
on
N/A
N/A
N/A
on
7/830
1
off
on
on
on
N/A
N/A
N/A
on
10/830
1
off
on
off
on
N/A
N/A
N/A
on
15/918
1
off
off
on
on
N/A
N/A
N/A
on
5/977
1
off
off
off
on
N/A
N/A
N/A
on
Note:This controller has a built-in, low-level format program. To enter the program run the DEBUG utility supplied with DOS and at the prompt enter: G=C800:5
SW1/switch 8 must be "on" before power-up to enable the drive splitting feature.

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NDC 5027 Hard Disk/Floppy Controller Settings and Configuration

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CONNECTIONS
Functions	Location
34-pin control cable connector-hard drive	CN1
20-pin data cable connector-drive 0	CN2
20-pin data cable connector-drive 1	CN3

USER CONFIGURABLE SETTINGS
Function		Location	Setting
»	Factory configured - do not alter	JP1/all	N/A
»	Recalibration speed is fast or normal	JP4	open
	Recalibration speed is slow	JP4	closed
»	Supports up to 8 heads	JP6	pins 1 & 2 closed
	Supports up to 16 heads	JP6	pins 2 & 3 closed

BIOS DRIVE TYPE TABLE FOR THE NCL5027 - SW1
Hd/Cyl	#	1	2	3	4	5	6	7	8
7/699	1	on	on	on	off	N/A	N/A	N/A	on
6/612	1	on	on	off	off	N/A	N/A	N/A	off
	2	N/A	N/A	N/A	off	on	on	off	off
4/640	1	on	off	on	off	N/A	N/A	N/A	off
	2	N/A	N/A	N/A	off	on	off	on	off
4/612	1	on	off	on	off	N/A	N/A	N/A	off
	2	N/A	N/A	N/A	off	on	off	on	off
2/612	1	off	on	on	off	N/A	N/A	N/A	off
	2	N/A	N/A	N/A	off	off	on	on	off
2/306	1	off	on	off	off	N/A	N/A	N/A	off
	2	N/A	N/A	N/A	off	off	on	off	off
4/320	1	off	off	on	off	N/A	N/A	N/A	off
	2	N/A	N/A	N/A	off	off	off	on	off
4/306	1	off	off	off	off	N/A	N/A	N/A	off
	2	N/A	N/A	N/A	off	off	off	off	off
6/640	1	on	on	on	on	N/A	N/A	N/A	off
	2	N/A	N/A	N/A	on	on	on	on	off
5/733	1	on	on	off	on	N/A	N/A	N/A	off
	2	N/A	N/A	N/A	on	on	on	off	off
7/733	1	on	off	on	on	N/A	N/A	N/A	on
5/830	1	on	off	off	on	N/A	N/A	N/A	on
7/830	1	off	on	on	on	N/A	N/A	N/A	on
10/830	1	off	on	off	on	N/A	N/A	N/A	on
15/918	1	off	off	on	on	N/A	N/A	N/A	on
5/977	1	off	off	off	on	N/A	N/A	N/A	on
Note:This controller has a built-in, low-level format program. To enter the program run the DEBUG utility supplied with DOS and at the prompt enter: G=C800:5 SW1/switch 8 must be "on" before power-up to enable the drive splitting feature.