SEAGATE TECHNOLOGY INC.
ST21M, ST21R
Data bus: 16-bit, ISA
Size: Half-length, full-height card
Hard drives supported: Two MFM ST506/ST412 drives (ST21M)
Two RLL ST412 drives (ST21R)
Floppy drives supported: None
|
CONNECTIONS | |
|
Function |
Location |
|
34-pin control cable connector-hard drive |
J2 |
|
20-pin data cable connector-drive 1 |
J3 |
|
20-pin data cable connector-drive 0 |
J4 |
|
4-pin connector-drive active LED |
J5 |
|
5-pin connector-DC power |
J6 |
|
BIOS ENABLE | |||
|
Function |
Location |
Setting | |
| » |
BIOS enabled |
JP3 |
open |
|
BIOS disabled |
JP3 |
closed | |
|
I/O AND BIOS ADDRESS | |||
|
Hard/Floppy Drive Address |
BIOS Addresss |
JP1 |
JP2 |
|
1F0-1F7/3F6-3F7h |
C8000-CBFFFh |
open |
open |
|
1F0-1F7/3F6-3F7h |
CC000-CFFFFh |
open |
closed |
|
170-177/376-377h |
D8000-DBFFFh |
closed |
open |
|
170-177/376-377h |
DC000-DFFFFh |
closed |
closed |
|
DRIVE PARAMETERS SUPPORTED BY THE ST21M | |||
|
Capacity |
Heads |
Cylinder |
SPT |
|
21.4 |
4 |
615 |
17 |
|
32.1 |
6 |
615 |
17 |
|
42.5 |
5 |
977 |
17 |
|
42.8 |
6 |
820 |
17 |
|
44.5 |
5 |
1024 |
17 |
|
80.2 |
9 |
1024 |
17 |
|
83.9 |
9 |
1072 |
17 |
|
DRIVE PARAMETERS SUPPORTED BY THE ST21R | |||
|
Capacity |
Heads |
Cylinder |
SPT |
|
21.17 |
2 |
667 |
31 |
|
32.7 |
4 |
615 |
26 |
|
42.9 |
4 |
667 |
31 |
|
49.1 |
6 |
615 |
26 |
|
65.5 |
6 |
820 |
26 |
|
122.7 |
9 |
1024 |
26 |
|
128.4 |
9 |
1072 |
26 |