...because we can't all be on the bleeding edge...
Data bus: </FONT>

ADAPTEC, INC.

ACB-2070A

Data bus:

8-bit, ISA

Size:

Full-length, full-height card

Hard drives supported:

Two RLL ST506 drives

Floppy drives supported:

None

CONNECTIONS

Function

Location

20-pin data cable connector -drive 0

J0

20-pin data cable connector-drive 1

J1

34-pin control cable connector-floppy drive

J2

BIOS DRIVE TYPE TABLE

Table #

Hds

Cyls

MFM Cap.

RLL Cap.

MN-Drive 0

QR-Drive 1

OP-Drive 0

ST Drive 1

0
4
615
21.41MB
32.74MB
closed
closed
1
2
612
10.65MB
16.29MB
closed
open
2
5
981
42.69MB
65.29MB
open
closed
3
4
612
21.30MB
32.58MB
open
open

USER CONFIGURABLE SETTINGS

Function

Location

Setting

»

Factory configured - do not alter
AB
open

»

Factory configured - do not alter
CD
open

»

Drive 0 is a soft-sectored ST506-type drive
EF
open

 

Drive 0 is a removable cartridge Syquest SQ319R
EF
closed

»

Drive 1 is a soft-sectored ST506-type drive
GH
open

 

Drive 1 is a removable cartridge Syquest SQ319R
GH
closed

»

CN3 and CN2 normal setting
IJ
open

 

CN2 and CN3 drive swap
IJ
closed

»

Normal operation
KL
open

 

Self diagnostics enable
KL
closed

MISCELLANEOUS TECHNICAL NOTES

If Jumper IJ is set to "closed" then the data cable connector assignments are swapped-
CN2 becomes drive 1 and CN3 drive 0.

Other drives may be attached by use of the user-definable parameters through software.