Seagate ST01 SCSI Host Adapter
Default settings are in Bold or are selected by a 
(W1): BIOS Address
| 8KB PROM |
|
16KB PROM (<v3.3) |
|
16KB PROM (v3.3) |
 |
|
 |
|
 |
| (A/B) |
(C/D) |
Address |
|
(A/B) |
(C/D) |
Address |
|
(1/2) |
(3/4) |
Address |
| Off |
Off |
CA00 |
|
Off |
Off |
C800 |
|
Off |
Off |
C8000 |
| On |
Off |
C800 |
|
On |
Off |
(Invalid) |
|
On |
Off |
(Invalid) |
| Off |
On |
CE00 |
|
Off |
On |
CC00 |
|
Off |
On |
CC000 |
| On |
On |
DE00 |
|
On |
On |
DC00 |
|
On |
On |
DC000 |
(Defaults are 8KB: CA00, & 16KB: C800.)
(W2)(JP2): Zero Wait State (0WS)
(W3)(JP3): Interrupt Select
| 8KB |
16KB |
16KB V3.3 |
 |
 |
 |
|
|
|
|
|
|
| (E/F)(1/2) |
(F/G)(2/3) |
Interrupt |
| Off |
Off |
Disabled |
| On |
Off |
IRQ#3 |
| Off |
On |
IRQ#5 |
(Default is IRQs Disabled.)
(JP6): Hard Drive Register Emulation
(JP8): SCSI Bus Termination
The ST01 uses a Future Domain SCSI Controller IC, but uses a BIOS modified by Seagate
to support their SCSI drives. It's support was limited to a maximum of 2 drives until BIOS version 3.3, when additional support was added. The 3.3 version of the ST01 also allowed an external SCSI connector option. Seagate shipped a special formatter program with early adapters, and a Low Level Formatter utility is available through use of the DOS Debug command as follows:
C:\debug <enter>
-g=c800:5 <enter>
...where c800 is the address you set the Host Adapter at.
| ST01 |
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