OMTI 8620, OMTI 8627 Hard Disk/Floppy Controller Settings and Configuration

SCIENTIFIC MICRO SYSTEMS

OMTI 8620, OMTI 8627

Data bus:
16-bit, ISA
Size:
Full-length, full-height card
Hard drives supported:
OMTI 8620:Two MFM ST506/ST412 drives or ESDI drives
OMTI 8627:Two RLL ST506/ST412 or ESDI drives
Floppy drives supported:
Two 360KB, 720KB, 1.2MB, 1.44MB drives
Sector interleave:
1:1
Maximum heads/cyl.:
16 heads and 2048 cylinders

CONNECTIONS
Function
Location
34-pin control cable connecter-floppy drive
J1
34-pin control cable connecter-hard drive
J2
20-pin data cable connecter-drive 0
J3
20-pin data cable connecter-drive 1
J4
4-pin connecter-drive active LED
J5

USER CONFIGURABLE SETTINGS
Function
Location
Setting
»
Drive 1 set for fixed media drive
W4
open

Drive 1 set for removable media drive
W4
closed
»
Drive 1 set for ST506 drive
W5
open

Drive 1 set for ESDI drive
W5
closed
»
Drive 1 soft sectored
W6
open

Drive 1 hard sectored
W6
closed
»
Drive 0 set for fixed media drive
W7
open

Drive 0 set for removable media drive
W7
closed
»
Drive 0 set for ST506 drive
W8
open

Drive 0 set for ESDI drive
W8
closed
»
Drive 0 soft sectored
W9
open

Drive 0 hard sectored
W9
closed

If the drive on CN3 is a ESDI drive this trace must be cut
W12
open

If the drive on CN4 is a ESDI drive this trace must be cut
W13
open
»
Floppy drive port address is 3F0-3F7
W14
open

Floppy drive port address is 370-377
W14
closed
»
BIOS base address is C8000h
W15
open

BIOS base address is CA000h
W15
closed
»
BIOS enabled
W16
open

BIOS disabled
W16
closed
»
Factory configured - do not alter
W20
N/A
»
I/O speed set to high performance string mode
W21
open

I/O speed set to loop
W21
closed
»
If BIOS is #1002661, then drive 0 parameters are set to 4 hds. and 612 cyl. If BIOS is #1002662, then drive 0 parameter are set to 4 hds. and 615 cyl.
W22
open
»
Factory configured - do not alter
W22
closed
»
If BIOS is #1002661, then drive 1 parameters are set to 4 hds. and 612 cyl.If BIOS is #1002662, then drive 1 parameter are set to 4 hds. and 615 cyl.
W23
open
»
Factory configured - do not alter
W23
closed

SECTOR CONFIGURATION
Jumper W10
Jumper W11
BPS (ST506 only)
SPT- 8620
SPT- 8627
open
open
512
17
26
open
closed
512
17
26
closed
open
1024
18
26
closed
closed
1056
9
13

I/O PORT ADDRESS
Address
Jumper W17
Jumper W18
Jumper W19
320h
open
open
open
324h
open
open
closed
328h
open
closed
open
32Ch
open
closed
closed
1A0h
closed
open
open
1A4h
closed
open
closed
1A8h
closed
closed
open
1ACh
closed
closed
closed

DRIVE TYPE CONFIGURATION - #1002579
DRIVE 0
DRIVE 2

W20
W21
W22
W23
Cyl.
Hds.
closed
closed
closed
closed
ESDI
ESDI
open
closed
open
closed
987
7
closed
open
closed
open
918
15
open
open
open
open
612
4

DRIVE TYPE CONFIGURATION - #1002578
DRIVE 0
DRIVE 2

W20
W21
W22
W23
Cyl.
Hds.
closed
closed
closed
closed
ESDI
ESDI
open
closed
open
closed
820
6
closed
open
closed
open
1024
9
open
open
open
open
615
4

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OMTI 8620, OMTI 8627 Hard Disk/Floppy Controller Settings and Configuration

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Data bus:	16-bit, ISA
Size:	Full-length, full-height card
Hard drives supported:	OMTI 8620:Two MFM ST506/ST412 drives or ESDI drives OMTI 8627:Two RLL ST506/ST412 or ESDI drives
Floppy drives supported:	Two 360KB, 720KB, 1.2MB, 1.44MB drives
Sector interleave:	1:1
Maximum heads/cyl.:	16 heads and 2048 cylinders

CONNECTIONS
Function	Location
34-pin control cable connecter-floppy drive	J1
34-pin control cable connecter-hard drive	J2
20-pin data cable connecter-drive 0	J3
20-pin data cable connecter-drive 1	J4
4-pin connecter-drive active LED	J5

USER CONFIGURABLE SETTINGS
Function		Location	Setting
»	Drive 1 set for fixed media drive	W4	open
	Drive 1 set for removable media drive	W4	closed
»	Drive 1 set for ST506 drive	W5	open
	Drive 1 set for ESDI drive	W5	closed
»	Drive 1 soft sectored	W6	open
	Drive 1 hard sectored	W6	closed
»	Drive 0 set for fixed media drive	W7	open
	Drive 0 set for removable media drive	W7	closed
»	Drive 0 set for ST506 drive	W8	open
	Drive 0 set for ESDI drive	W8	closed
»	Drive 0 soft sectored	W9	open
	Drive 0 hard sectored	W9	closed
	If the drive on CN3 is a ESDI drive this trace must be cut	W12	open
	If the drive on CN4 is a ESDI drive this trace must be cut	W13	open
»	Floppy drive port address is 3F0-3F7	W14	open
	Floppy drive port address is 370-377	W14	closed
»	BIOS base address is C8000h	W15	open
	BIOS base address is CA000h	W15	closed
»	BIOS enabled	W16	open
	BIOS disabled	W16	closed
»	Factory configured - do not alter	W20	N/A
»	I/O speed set to high performance string mode	W21	open
	I/O speed set to loop	W21	closed
»	If BIOS is #1002661, then drive 0 parameters are set to 4 hds. and 612 cyl. If BIOS is #1002662, then drive 0 parameter are set to 4 hds. and 615 cyl.	W22	open
»	Factory configured - do not alter	W22	closed
»	If BIOS is #1002661, then drive 1 parameters are set to 4 hds. and 612 cyl.If BIOS is #1002662, then drive 1 parameter are set to 4 hds. and 615 cyl.	W23	open
»	Factory configured - do not alter	W23	closed

SECTOR CONFIGURATION
Jumper W10	Jumper W11	BPS (ST506 only)	SPT- 8620	SPT- 8627
open	open	512	17	26
open	closed	512	17	26
closed	open	1024	18	26
closed	closed	1056	9	13

I/O PORT ADDRESS
Address	Jumper W17	Jumper W18	Jumper W19
320h	open	open	open
324h	open	open	closed
328h	open	closed	open
32Ch	open	closed	closed
1A0h	closed	open	open
1A4h	closed	open	closed
1A8h	closed	closed	open
1ACh	closed	closed	closed

DRIVE TYPE CONFIGURATION - #1002579
DRIVE 0	DRIVE 2
W20	W21	W22	W23	Cyl.	Hds.
closed	closed	closed	closed	ESDI	ESDI
open	closed	open	closed	987	7
closed	open	closed	open	918	15
open	open	open	open	612	4

DRIVE TYPE CONFIGURATION - #1002578
DRIVE 0	DRIVE 2
W20	W21	W22	W23	Cyl.	Hds.
closed	closed	closed	closed	ESDI	ESDI
open	closed	open	closed	820	6
closed	open	closed	open	1024	9
open	open	open	open	615	4