Category : HD Utilities
Archive   : ALLGUIDE.ZIP
Filename : ST07-08.TXT

 
Output of file : ST07-08.TXT contained in archive : ALLGUIDE.ZIP




ST07A, ST08A
-------------------------------------------------
AT INTERFACE HOST ADAPTER
-------------------------------------------------
INSTALLATION GUIDE
=================================================











----------------------------------------Seagate





Copyright Notice:

Seagate, Seagate Technology and the Seagate logo are registered
trademarks of Seagate Technology, Inc.

@Copyright 1990, Seagate Technology, Inc.
920 Disc Drive
Scotts Valley, CA 95066-4544, USA
408/438-6550

Publication Number: 36118-001, Rev. B

Seagate reserves the right to change, without notice, product
offerings or specifications.

This publication is copyrighted with all rights reserved. No part
of this document may be copied without written permission of
Seagate Technology, Inc.

IBM and PC AT are registered trademarks of International Business
Machines Corporation.


1

Introduction:

The ST07A and ST08A Host Adapters are used in conjunction with a
Seagate AT interface drive and an IBM PC AT (or compatible)
computer. They are both half-slot boards, which provide a 40-pin
AT interface connector for systems lacking an AT interface drive
connector on the system motherboard.

The ST07A/ST08A support two AT interface drives. They provide
address decoding for hard drive I/O and buffering of signals
between the host and the hard drive.

The ST08A supports up to two floppy diskette drives:

* 5.25-inch, 260 KByte/1.2 MByte
* 3.5-inch, 720 KByte/1.44 MByte

An auxiliary DC power connector and mounting points are provided
on both boards for "Drive-on-a-Card" applications.

2

Figure 1: ST07A/ST08A AT Interface Host Adapter

J2 ÚÄ Drive-on-a-Card Mounting Point
Diskette ³
Connector J3 LED ³ J1 AT Interface
(ST08A only) ³ ÚÄÄÄÙ Hard Disc Connector
³ ÚÄÄÄÄÄÄÄÄÄÄÅÄÄÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ¿ Ýßßßß
³ ³ 1 1 ø ³ ÚÄÄÅÄÝ
³ ³ :: øøøø :::::::::::::::::::: ÀøÄÅÄÝ
³ ³ :: 1 ³ Ý
ÀÄÄÅÄÄ :: ÚÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄ JP2
³ :: 1 ³ Ý Disc/Diskette
³ :: øø ³ Ý Address
³ :: ³ Ý Select
³ :: Ú1ÄÄÄÄ JP4 Diskette Controller Enable ³ Ý
³ : ÚÄÄÄÄÄÄÄÄÄÄÅÄÄÄ JP6 I/O
³ ððÝð}ÄÄ J4 Aux DC Power to 1 ÚÄÄÅÄÝ Channel
³ 1¿ Hard Disc øø ÀøÄÅÄÝ Ready
³ øøøÀÄÄÄ¿ ³ Ý
À¿ Ü Ü Ü Ü Ü Ü ÜÚÄÅÄÄ¿ Ü Ü Ü Ü Ü Ü Ü Ü Ü Ü Ü Ü Ü ÜÚÄÄÄÄÙ Ý
ÀÄßÄßÄßÄßÄßÄßÄßÙ ³ ÀÄßÄßÄßÄßÄßÄßÄßÄßÄßÄßÄßÄßÄßÄßÙ Ý
ÀÄ JP5 Disable Interrupt Ý


3

1.0 ST07A/ST08A Interface Connector/User Options

1.1 AT Interface Drive Connector: J1

J1 is a 40-pin header. J1 provides the AT interface connection to
the hard drive. Maximum cable length: 18 inches (.45 meter).


1.2 Floppy Diskette Connector: J2 (ST08A Only)

J2 is a 34-pin header. J2 provides connection to floppy diskette
drives. Refer to Section 1.6 for supported formats.


1.3 LED Connector: J3

J3 is a 4-pin header. J3 provides connection to a drive activity
indicator.

-----------------------------
| Pin 1 or 4 | + to LED |
-----------------------------
| Pin 2 or 3 | - to LED |
-----------------------------

4

1.4 Auxiliary Drive DC Power Connector: J4

J4 is a 6-pin, right-angle header. J4 may be used to supply DC
power to a hard drive. This is provided for systems which lack an
available power harness or for "Drive-on-a-card" applications.

-----------------------------------------
| Pin | Signal | Description |
=========================================
| 1 | + 12 VDC | + 12 VDC Power |
-----------------------------------------
| 2 | + 12 VDC | + 12 VDC Power |
-----------------------------------------
| 3 | + 5 VDC | + 5 VDC Power |
-----------------------------------------
| 4 | Key | Pin Removed |
-----------------------------------------
| 5 | GND | Ground |
-----------------------------------------
| 6 | GND | Ground |
-----------------------------------------



1.5 Hard Drive I/O Address Selection: JP2

JP2 provides address decoding for hard drive I/Os.

----------------------------------------------------------
| Pin | Address Selection | Drive Address |
==========================================================
| 1-2 | Primary Address | 1F0-1F7, 3F6-3F7 |
| Open | Standard Configuration | |
----------------------------------------------------------
| 1-2 | Secondary Address | 170-177, 376-377 |
|Shorted| | |
----------------------------------------------------------

5

1.5.1 Floppy Diskette Drive I/O Address Selection: JP2

JP2 provides address decoding for the floppy diskette drive I/Os
(ST08A only)

-----------------------------------------------------------
| Pin | Address Selection | Diskette Drive |
| | | Address |
===========================================================
| 1-2 | Primary | 3F0-3F5, 3F7 |
| Open | Standard Configuration | |
-----------------------------------------------------------
| 1-2 | Secondary | 370-375, 377 |
|Shorted| | |
-----------------------------------------------------------


1.6 ST08A Controller Enable: JP4

The ST08A supports up to two floppy diskette drives of the
following formats:

* 5.25-inch, 360 KByte/1.2 MByte
* 3.5-inch, 720 KByte/1.44 MByte

-----------------------------------------------------
| Pin | Diskette Controller Status |
=====================================================
| Pins 1-2 Shorted | Controller Enabled |
| | Standard Configuration |
-----------------------------------------------------
| Pins 1-2 Open | Controller Disabled |
-----------------------------------------------------

6

1.7 Disable Interrupt While Busy: JP5

-------------------------------------------------------------
| Pin | Interrupt Status |
=============================================================
| Pins 2-3 Shorted | The hard drive interrupt is |
| | directly connected to the IRQ 14 |
| | line of the AT bus. |
| | |
| | Standard For All Seagate AT |
| | Interface Drives |
------------------------------------------------------------|
| Pins 1-2 Shorted | IRQ14 to the host is cleared when the |
| | the hard drive goes BUSY. This jumper |
| | configuration is specially provided |
| | for those systems which do not read |
| | status following an interrupt. |
|-----------------------------------------------------------|

1.8 I/O Channel Ready: JP6

------------------------------------------------------------
| Pin | I/O Channel Status |
------------------------------------------------------------
| Pins 1-2 | I/O channel READY from hard drive is |
| Open | not connected to the host. |
| | Standard Configuration |
------------------------------------------------------------
| Pins 1-2 | I/O channel READY from the hard drive is |
| Shorted | connected to the host. |
------------------------------------------------------------

-- End-of-File --



  3 Responses to “Category : HD Utilities
Archive   : ALLGUIDE.ZIP
Filename : ST07-08.TXT

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