NCL 5027 Hard Disk/Floppy Controller Settings and Configuration

NCL AMERICA

NCL 5027

Data bus: 8-bit, ISA

Size: Half-length, full-height card

Hard drives supported: Two ST506/412 MFM drives

Floppy drives supported: None

Sector Interleave: 6:1

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

USER CONFIGURABLE SETTINGS
Function
Location
Setting
»
BIOS enabled
JP1/all
closed

BIOS disabled
JP1/all
open
»
Speed Recalibration set to slow
JP4
closed

Speed Recalibration set to fast or normal
JP4
open
»
Head select set up to 8 heads
JP6
pins 1 & 2 closed

Head select set up to 16 heads
JP6
pins 2 & 3 closed

BIOS DRIVE TYPE TABLE FOR THE NCL5027
Hd/Cyl
#
S1/1
S1/2
S1/3
S1/4
S1/5
S1/6
S1/7
S1/8
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:SW1/switch 8 must be "on" before power-up to enable the drive splitting feature.

MISCELLANEOUS TECHNICAL NOTES
Jumper JP2 is the port address jumper and is hard soldered at the factory to 320h.
Jumpers JP3, 5, 7, 8, and 9 are Not used and their exact location is unknown.

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NCL 5027 Hard Disk/Floppy Controller Settings and Configuration

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

USER CONFIGURABLE SETTINGS
Function		Location	Setting
»	BIOS enabled	JP1/all	closed
	BIOS disabled	JP1/all	open
»	Speed Recalibration set to slow	JP4	closed
	Speed Recalibration set to fast or normal	JP4	open
»	Head select set up to 8 heads	JP6	pins 1 & 2 closed
	Head select set up to 16 heads	JP6	pins 2 & 3 closed

BIOS DRIVE TYPE TABLE FOR THE NCL5027
Hd/Cyl	#	S1/1	S1/2	S1/3	S1/4	S1/5	S1/6	S1/7	S1/8
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:SW1/switch 8 must be "on" before power-up to enable the drive splitting feature.