Adaptec SlimSCSI APA-1460 Use and care manual

Technical Reference
APA-1460 SlimSCSI
PCMCIA-to-SCSI Host Adapter
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Adaptec, Inc.
691 South Milpitas Boulevard
Milpitas, CA 95035
Copyright © 1994, Adaptec, Inc.
All rights reserved. Adaptec and the Adaptec logo
are registered trademarks of Adaptec, Inc.
Printed in Singapore
STOCK NO: 510671-00 Rev. A LL 08/94

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APA-1460 SlimSCSI Technical Reference
Stock Number: 510671-00 Rev. A Page: Front Matter-i
Print Spec Number: 492966-00
Current Date: 8/22/94 ECN Date: 8/30/94
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▼ ▼ ▼ ▼ ▼ APA-1460 SlimSCSI
PCMCIA-to-SCSI Host Adapter
Technical Reference

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Copyright
Copyright © 1994 Adaptec, Inc. All rights reserved. No part of this publication may be reproduced,
stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical,
photocopying, recording or otherwise, without the prior written consent of Adaptec, Inc., 691 South
Milpitas Blvd., Milpitas, CA 95035.
Trademarks
Adaptec, the Adaptec logo, AHA, and PhaseEngine are registered trademarks and SlimSCSI and
EZ-SCSI are trademarks of Adaptec, Inc.
IBM, OS/2, and AT are registered trademarks of International Business Machines Corporation.
Microsoft and MS-DOS are registered trademarks of Microsoft Corporation.
NetWare is a registered trademark of Novell, Inc.
Toshiba is a registered trademark of Toshiba Corporation.
UNIX is a registered trademark of Unix System Laboratories.
486 is a trademark of Intel Corporation.
Changes
The material in this document is for information only and is subject to change without notice. While
reasonable efforts have been made in the preparation of this document to assure its accuracy,
Adaptec, Inc. assumes no liability resulting from errors or omissions in this document, or from the
use of the information contained herein.
Adaptec reserves the right to make changes in the product design without reservation and without
notification to its users.
Adaptec Technical Support
Adaptec products have been specifically developed for easy installation and use. We believe that
our documents and the onscreen instructions and help are complete and clear enough to meet your
needs. If you need more assistance, please contact us.
●The Adaptec Electronic Bulletin Board Service (BBS) provides information on software upgrades,
new releases, technical advice, and other topics. The BBS is available 24 hours a day at
408-945-7727; 1200/2400/9600/14400 baud, 8 data bits, 1 stop bit, no parity.
●To contact the Adaptec Technical Support Hot Line, call 800-959-SCSI (7274) or 408-945-2550;
M–F: 6:00 a.m. to 5:00 p.m., Pacific Time.
Interactive Fax Service
The Adaptec Interactive Fax Service provides the latest online information about Adaptec products
and services. The Adaptec Interactive Fax Service is available 23 hours a day, 7 days a week, at
408-957-7150.
Ordering Software and Cables
To order Adaptec software and SCSI cables, call 800-442-SCSI (7274), M–F: 6:00 a.m. to 5:00 p.m.,
Pacific Time. If you are calling from outside the U.S. and Canada, the number is 408-957-SCSI (7274).
Literature Hotline
To request additional documentation for Adaptec products, call 800-934-2766, M–F: 5:00 a.m. to
6:00 p.m., Pacific Time.

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FCC Compliance Statement
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part
15 of the FCC rules. These limits are designed to provide reasonable protection against harmful interference in
residential installations. This equipment generates, uses, and can radiate radio frequency energy, and if not
installed and used in accordance with the instructions, may cause harmfulinterference to radio communications.
However, there is no guarantee that interference will not occur in a particular installation.
If this equipment does cause interference to radio or television equipment reception, which can be determined
by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of
the following measures:
• Reorient or relocate the receiving antenna
• Move the equipment away from the receiver
• Plug the equipment into an outlet on a circuit different from that to which the receiver is powered
• If necessary, the user should consult the dealer or an experienced radio/television technician for additional
suggestions
CAUTION: Only equipment certified to comply with Class B (computer input/output devices, terminals, print-
ers, etc.) should be attached to this equipment, and must have shielded interface cables.
Finally, any changes or modifications to the equipment by the user not expressly approved by the grantee or
manufacturer could void the user’s authority to operate such equipment.
Each host adapter is equipped with an FCC compliance label which shows only the FCC identification number.
The full text of the associated label follows:
This device complies with part 15 of the FCC rules. Operation is subject to the following two conditions:
(1) this device may not cause harmful interference and (2) this device must accept any interference
received, including interference that may cause undesired operation.

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▼ ▼ ▼ ▼ ▼ Table of Contents
Preface
Inside This Document vii
Conventions vii
1 Introduction
About This Chapter 1-1
Overview 1-3
Features 1-3
Related Documents 1-4
2 Conformance to Industry Specifications
About This Chapter 2-1
Conformance to PCMCIA Standards 2-3
Conformance to SCSI Standards 2-3
3 Product Specifications
About This Chapter 3-1
Electrical Specifications 3-3
PCMCIA 3-3
SCSI 3-3
Mechanical Specifications 3-3
APA-1460 Card Dimensions 3-3
APA-1460 Cable Dimensions 3-3
Termination Power 3-4
Internal Bus Pull-up Resistor 3-4
Cable Specifications 3-4
4 Connector Pinout
About This Chapter 4-1
Connectors 4-3
PCMCIA 68-pin Bus Interface Connector 4-3
SCSI 50-pin Shielded Connector 4-5
APA-1460 Card and Cable Connector 4-6

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5 Functional Specification
About This Chapter 5-1
Functional Specification 5-3
PCMCIA Attribute Memory Space 5-3
APA-1460 CIS 5-3
Configuration Option Register 5-4
APA-1460 Initialization 5-4
SCSI I/O Register Map 5-4
Address Mapping 5-5
Attribute Memory - 0000h to 1FFFh, 8 KBytes (Read/Write) 5-5
Configuration Register - 2000h (Read/Write) 5-5
I/O Address - 340h to 35Fh or 140h to 15Fh 5-5
Common Memory 5-5
About the Updateable Attribute Memory 5-6
Power Down Mode 5-7
Plug and Play and SCAM 5-7
Glossary
Index

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▼ ▼ ▼ ▼ ▼ Preface
Inside This Document
This document describes the mechanical, electrical, and other functional
characteristics of the APA-1460 PCMCIA-to-SCSI host adapter. This docu-
ment is targeted primarily at two audiences: individuals who need a
detailed technical reference for APA-1460 information; and software engi-
neers who are writing code for the APA-1460 host adapter.
Chapter 1 Introduction
provides an overview of the APA-1460 PCMCIA-to-SCSI host adapter.
Chapter 2 Conformance to Industry Specifications
explains how the APA-1460 conforms to PCMCIA and SCSI standards.
Chapter 3 Product Specifications
lists electrical and mechanical specifications for the APA-1460.
Chapter 4 Connector Pinout
lists the signal names for the pins on the PCMCIA, SCSI, and Card/Cable
connectors.
Chapter 5 Functional Specification
describes the two types of PCMCIA bus cycles to which the APA-1460
responds.
Conventions
The following typographic conventions are used in this document.
bold
Used for keystrokes (… press the Enter key …).
Helvetica
Used for operator entry that must be typed exactly as shown
(… device=c:aspi2dos.sys …) and for messages on the screen
(… Enter Password …).
Helvetica Italics
Used as a place holder for text you must determine and type in (… enter
nn for number …). Also used for program and file names that appear in
body text (… the
autoexec.bat file …).
Italics
Used for emphasis (… is only supported …) and for document reference
(… refer to Chapter 1, Introduction…).

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SMALL CAPITALS
Used for register names, signal names, and commands
Hexadecimal Numbers
Are followed by an ‘h’, e.g., 330h.
End Mark
The ❐symbol marks the end of the text for each chapter.
❒

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▼ ▼ ▼ ▼ ▼ 1Introduction
About This Chapter
Read this chapter to find out
■An overview of the APA-1460 PCMCIA-to-SCSI host adapter
■A list of related documents which provide additional informa-
tion related to the APA-1460

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Introduction
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▼ ▼ ▼ ▼ ▼
Overview
The Adaptec APA-1460 PCMCIA-to-SCSI Host Adapter is a PCMCIA Type II add-in card
which allows computers equipped with a PCMCIA Type II, Type III, or Toshiba®Type IV
socket to connect to a wide range of SCSI devices, including CD-ROM, hard disk, and tape.
PCMCIA (Personal Computer Memory Card International Association) is a widely
accepted industry standard for small form factor add-in cards. Such add-in cards gener-
ally fall into two categories:
■Memory add-in products including solid state and rotating media
■I/O add-in products, typically including fax-modems, network adapters, and SCSI
host adapters
PCMCIA is especially popular with notebook and subnotebook computers because of its
small, credit card size form factor and it is also supported on some desktop platforms.
SCSI is a well known and widely accepted peripheral interface bus standard. Most
CD-ROMs and many high-performance, high-capacity hard disks and tape drives imple-
ment the SCSI standard as well as scanners, high-speed laser printers, and digital
cameras.
The APA-1460 combines these two interface standards, permitting PCMCIA-equipped
host computers to communicate with SCSI devices at data rates up to 2 MBytes/sec. The
APA-1460 design addresses concerns present in the PCMCIA and SCSI worlds, many of
which are listed below in Features.
The APA-1460 is comprised of two physical parts: the Type II PCMCIA card, containing
the PCMCIA and SCSI electronics, and a custom SCSI cable. Reference to these two parts
is made throughout the document as the Card and Cable, respectively; both terms are cap-
italized for clarity. It is understood that APA-1460 refers collectively to the Card and
Cable.
Features
■PIO Mode data transfer, overlapping mode address 340h or 140h
■Power down Mode
■Updateable attribute memory
■Fast SCSI support
■Plug and Play support
■SCAM support (software support to be added later)
■Based on PCMCIA 2.1 Specification
■Conforms to the PCMCIA Specification, Release 2.1
■Light-weight, yet rugged packaging

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APA-1460 SlimSCSI Technical Reference
■Fully compliant with SCSI-1 electrical specifications (software implements SCSI-2
commands)
■ASPI (Advanced SCSI Programming Interface) compatibility
■Hardware compatibility with a wide range of PCMCIA platforms (current software
is compatible with x86 platforms)
Related Documents
In several cases, this document refers you to other related documents. Some of these doc-
uments are highly recommended, such as the AIC-6360 Data Book. You should have a
working familiarity with PCMCIA and SCSI prior to reading this document.
The following documents provide additional detailed technical information related to the
APA-1460.
■Small Computer System Interface (SCSI-2) Specification, ANSI X3.131-1994.
■PCMCIA Specification, Release 2.1
■AIC-6360 Data Book
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▼ ▼ ▼ ▼ ▼ 2Conformance to Industry
Specifications
About This Chapter
Read this chapter to find out
■Conformance requirements to PCMCIA standards
■Conformance requirements to SCSI standards

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Conformance to Industry Specifications
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▼ ▼ ▼ ▼ ▼
Conformance to industry specifications is an important requirement in today’s market-
place, especially with PCMCIA and SCSI. Conformance helps to guarantee the widest
range of compatibility for a product such as the APA-1460, with host computer platforms
and devices.
Conformance to PCMCIA Standards
Electrically, mechanically, and functionally, the APA-1460 was designed in conformance
with Release 2.1 of the PCMCIA Specification.
The PCMCIA electrical specifications are written to ensure that no damage occurs when a
PCMCIA compatible card is plugged into a PCMCIA compatible computer (voltage and
signal levels are correct, etc.) The electrical specifications also guarantee that cards may be
safely plugged and unplugged from a computer while the power is on, which is referred
to as hot swapping. The APA-1460 supports hot swapping.
The PCMCIA standard allows several physical form factors: Type I, Type II, Type III, and
Toshiba Type IV with certain allowable variations, such as Type II Extended. The
APA-1460 Card follows the form factor of a standard Type II card. When the APA-1460
Cable is plugged into the APA-1460 Card, the combination most closely resembles a
Type II Extended product with regard to key physical dimensions.
Functionally, in addition to the I/O mapped SCSI registers (see the AIC-6360 Data Book),
the APA-1460 also implements a PCMCIA Attribute Memory Space. Configuration informa-
tion in the form of a CIS (Card Information Structure) is stored in this memory space. The
CIS may be read by the PCMCIA host to automatically configure the APA-1460 using the
information stored therein.
Conformance to SCSI Standards
The APA-1460 is fully compatible with the SCSI-1 electrical specification. In fact, the
APA-1460 is based on the AIC-6360 SCSI protocol controller. Using this protocol controller,
the APA-1460 supports asynchronous and synchronous SCSI data transfer rates up to
10 MBytes/sec. The APA-1460 hardware supports SCSI arbitration, and disconnect/
reconnect features (though these features may or may not be taken advantage of by driver
software).
To save power and reduce noise on the SCSI cable, the APA-1460 uses active termination.
Active termination reduces terminator power consumption by nearly 100% in standby
mode and reduces reflections on the SCSI cable.
Using the SCSI-1 electrical interface, the APA-1460 software can send SCSI-2 commands to
those devices which require them. In this way, the APA-1460 is fully compatible with most
SCSI-2 devices on the market. (Most SCSI-2 devices claim SCSI-2 compliance by virtue of
their command set definition and are actually based on SCSI-1 electrical designs.)

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APA-1460 SlimSCSI Technical Reference
ASPI compatibility is another key aspect of the APA-1460‘s compliance with industry
standards for SCSI. ASPI is a software device driver model which allows a broad range of
SCSI device driver and application programs to be written which are not dependent on
the design of the SCSI host adapter.
ASPI support for the DOS and Windows operating systems is currently available for the
APA-1460.
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▼ ▼ ▼ ▼ ▼ 3Product Specifications
About This Chapter
Read this chapter to find out
■Electrical specifications for the APA-1460
■Mechanical specifications for the APA-1460

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