IBM 1 GB Microdrive Storage Card User manual

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ii GA34-0033
First Edition (November
1976)
Changes are periodically made to the information herein; any such changes will be reported in
subsequent revisions
or Technical Newsletters.
Requests for copies
of IBM publications should be made to your IBM representative or the IBM
branch office serving your locality.
A form for readers' comments
is provided at the back of this publication. If the form has been
removed, send your comments to
IBM Corporation, Systems Publications, Department 27T, P.O. Box
1328, Boca Raton, Florida 33432. Comments become the property
of IBM.
©Copyright International Business Machines Corporation 1976
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PREFACE
Summary of Publication
Prerequisite Publications
vii
viii
x
CHAPTER 1. INTRODOCTION 1-1
Processor I/O Channel 1-1
C han ne1 Re po we r i" eat u re 1- 1
Channel Socket Adapter Feature 1-3
I/O Attachment Features 1-3
Timer Feature 1-3
Teletypewriter Adapter Feature 1-3
Inteqrated Diqital Input/Output
Non-Isolated Feature 1-3
customer Direct Proqram Control Adapter Feature 1-4
Customer Access Panel Feature 1-4
CHAPTER 2. PROCESSOrl I/O CHANNEL
Introduction
Functional Description of the I/O Channel
Siqnal Lines
Siqndl Line Groups
Service Group of Siqnal Lines
Poll Group of Siqnal Lines
Functional Subsets of thE Siqnal Lines
B as ic S ub se t
Interrupt Subset
Cvcle Steal/IPL Subset
Service Group Line Definition
Poll Group Line Definition
Processor I/O Cha nnel Operational Character ist ics
operational Sequences on the Channel
DPC Sequence Description
Interrupt Service Sequence Description
Cycle Steal service Sequence Description
Poll Sequence Description
Processor Initiated IPL Sequence Description
Host Initiated IPL Sequence Description
Reset Sequenc€s Description
Desiqn Considerations for Operational Sequences
Operational Power Considerations
Processor I/O Channel Electrical Cnaracteristics
Channel Siqnal Line Blectrical Characteristics
D ri ver/Rece iver I nf arma tion
Other Attachment Considerations
Power Supply Electrical Characteristics
Processor I/O Cha nnel Ph ysical Characteristics
Siqnal Pin and Cable Assiqnments
I/O Channel Physical Components Description
Sequence of Pluqqinq Device Attachments
2-1
2- 1
2-3
2-)
2-3
2-4
2-5
2-5
2-7
2-8
2-9
2-14
2-18
2-18
2-21
2-25
2-28
2-31
2-37
2-41
2-43
2-44
2-54
2-51
2-57
2-60
2-72
2-74
2-75
2-75
2-19
2-82
Contents iii

Processor I/O Channel Attachment F€atures
Channel Repower Feature
Socket Adapter Feature
CHAPTER 3. TIMER FEATURE
In tl:oduct ion
Relationship to other Features
Application Summary
General Description
Functional Description of the External Timer
S iq na. 1 Line s
customer c loc k
External Gate
Hun
External Gate Enable
Siqna.l Line Considerations
Application Sequences
In t er val Time r
Pulse Counter
Pulse Duration Counter
Timer Feature Operational CharactEristics
Interrupts
Interrupt Presentation
status After Povec TransitionE and Hesets
Timer Feature Electrical Characteristics
Rec~ivers
Dcivers
Timer Feature Physical Characteristics
Si~nal Pin Assiqnmants
Pin .l\s~iqnments Sho.inq customer Access
Panel (CAP) Connections
Jumper Selections
Timer Feature Desiqn considerations
wirinq Practices
App lica tioD Notes
CHAPTER 4. fELETYPEWRITER ADAPTER FEATURE
Introduct ion
Relationship to other Features
Application Summary
General Descripticn
Data Transmission
Initial ProqraID Load
Teletypewriter Adapter Operational Characteristics
Types ai Receive Operations
Interrupt Presentation
Commands that Initiate ReceivE and
Transmit Operations
Transmit Operation
Receive Operation
System Related Characteristics
Teletypewriter Adapter Electrical Characteristics
Teletypewriter Adapter Communications Lines
Driver/Receiver Information
Power Supplies
Teletypewriter Adapter Physical Characteristics
Physical Description
iv GA34-0033
2-82
2-82
2-86
3-1
3-1
3- 2
3-4
3-5
3-5
3-5
3-6
3-6
3-6
3-6
3-6
3-6
3-7
3-7
3-8
3-8
3-8
3-9
3-10
3-10
J -11
3-13
3-13
3-14
3-15
3-15
3-15
3-15
4-1
4-1
4-4
4-4
4-9
4-9
4-10
4-10
4-11
4-11
4-13
4-13
4-15
4 -17
4-17
4-17
4-25
4-26
4-27
4-27

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siqnal Pin Assiqnments
Teletvpewriter Adapter Desiqn Considerations
Teletypewriter DevicE Information
Cable Connection to the Teletypewriter Adapter
Customer Access Panel Connections
CHAPTER 5. INtEGRATED DIGITAL INPU~/OUTPUT FEATURE
Introduction
Diqitdl Input (Dr)
Diqital Outpu t (DO)
Inteqrated Diqital I/O Operational Characteristics
Diqital output Operation
Oiqital Input Operation
Inteqrated Diqital I/O Electrical Characteristics
Diqital Input (01) cnaracteristics
Diqital and External Sync Input Specifications
D iqita 1 0 utpu t (DO) Cha racteristics
Diqital and Readv output specifications
Inteqrated Diqital I/O Physical Characteristics
Siqnal Pin Assiqnments
Inteqrated Diqital I/O to Customer Access
Panel connections
Jumper Selections
Inteqrated Diqitdl I/O Design Considerations
APplication Notes
CHAPTER 6. CUSTOMER DIRECT PROGRA~ CONTROL
A DA PT ER FEAT URB
Introduction
Relationship to other Features
A pplica tieD Summa rv
General Description
Functional Description of the DPC Adapter
S i q na 1 Line s
I/O Act iv€
Function Bits
[1 od if iee Bi ts
Dev ice Addr es s
Data Bus Out
Interrupt S€rvice Active
Strobe
Data Bus In
Interrupt Requests
Condi ti 0 n Code In
Select Return
Halt or Machine Check
System Reset
Power-O n Re se t
Diaqnostic Mode and Diaqnostic Mode Modifier
D~C Adapter Operational Characteristics
a ut put Sequence
I np ut Seq uence
Interrupt Ser vice Sequence
DPC AdaJ:,)ter Electrical Characteristics
Drivers
Receivers
4- 27
4-29
4-29
4-29
4-34
5-1
5-1
5-3
5-4
5-5
5-5
5-7
5-9
5-q
5-9
5-9
5-10
5-12
5-12
5-16
5- 21
5-22
5-22
6-1
6-1
6-1
6-3
6-3
6-3
6-4
6-5
6- 5
6-5
6-6
6-6
6-6
6-7
6-7
6-7
6-7
6-8
6-8
6-8
6-8
6-8
6-9
6-10
6-11
6-12
6-12
6-12
contents v

DPe Adapter physical Characteristics
Siqnal Pin Assiqnments
DPe Adapter to Customer Access Panel
C onnec tions
Jumper Selections
DPe Adapter Desiqn Considerations
Application Notes
vi GA34-0033
6-14
6-14
6-18
6-21
6-22
6-22
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rhis publication provides reference information to aid in
desiqninq loqic for communicating with an IBM 4953 or 4955
Proc€ssor throuqh the input/output channel and several
desiqnated user attachment features. This information is
primarily intended for experienced engineers and
technicians. This publication will also be useful to
cus tamers who nee d deta iled inf or aa ti cn f or connecting their
instruments and devices to the various attachment features.
The reader should have a workinq knowledge of the
information contained in the manuals listed in the
"Prerequisite Publications" section of this preface. These
publications contain information about: the processor, the
channel, the operate I/O instruction, device control blocks
with their associated commands and parameters, and the
interrupt mechanism. The reader should especially note that
the machine code information for the user attachment
features can be found in the ~rerequisite publications.
This information includes: command formats and descriptions,
condition codes, and status words.
Additional ~ublications that the reader will find useful
are listed in the tiRe la ted Pu.blications" section of this
preface. These publications provide physical planning
information and list the available machines and features.
li2tg. The processor I/O channel architecture, or any aspect
of the I/O interfaces described in this publication, may be
altered from time to time by IBM or may be withdrawn by IBM
in part or in whole.
Preface vii

SUMMARY OF PUBLICATION
~ha.Ql~[ 1.!. In.t.f.2!i'y
ct
iQ'!!- This chapter introduces the reader
to the I/O channel and the user attachment features that are
described in the subsequent chapters. A block diagram shovs
where the user attachment features are located with respect
to the processor and the I/O channel. The attachment points
covered are:
• Processor I/O channel
Channel socket adapter fEature
Channel repower feature
• Timer feature
• Teletypewriter adapter feature
• Inteqrated diqital input/output non-isolated feature
• customer direct proqram control adapter feature
~hg.Qt~~ ~~ E£Q£~§§Q~ lLQ ~h~nngl. The introduction to this
cha pter provides a qenera 1 description of the channel,
direct proqram centrol (DPC) operations, cycle steal (CS)
operations. interrupts, and initial program load (IPL).
•
•
•
•
The remaininq sections of this chapter provide:
Siqnal line descriptions--this section includes a list
of the I/O channel siqnal lines and identifies groups
and subsets of the lines. A functional description is
included for each siqnal line.
Operational characteristics--this section consists of
timinq charts and descripti v€ text for the various
siqnal sequences that can occur on the I/O channel.
Special timinq requirements and maximum skew are shown
on the charts.
Electrical characteristics--this includes (1) electrical
requirements for dr1vers and receivers and a) other
attachment considerations.
Phvsical characteristics--this section provides
connector information includinq illustrations and signal
pin assiqnments. This information is supplied for the:
1. I/O channel cahle connectors,
2. Channel socket adapter feature, and
3. C han DEI repo werfea ture.
~h~Qi§r 1~ Ii~§~ 1~~!Y£§. The introduction to this
provides a qeneral descripticn of the timer
includinq a block diaqram.
chapter
feature
•
•
•
•
The remaininq sections of this chapter provide:
Detailed information about the timer signal lines.
Operational characteristics of timer interrupts.
Timer electrical characteristics--tbis includes driver
and receiver information for external control of the
timers.
Timer physical characteristics--this section provides
connector information, including an illustration and
siqnal pin assiqnments for the connector located on the
printed circuit card.
viii GA34- 0033
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~Bg~!~~ ~~ Ig!giYBev!i1~! AggB!g£ Feature. This chapter
provides a qeneral description and a block--diagram of the
teletypewriter adapter feature.
Other sections of the chapter provide:
• Interface options for the teletypewriter adapter--this
includes isolated and non-isolated current loops and
voltaqe level interfaces for ElA* and TTL
(transistor-transistor loqic).
• Timinq sequences for transmit and receive operations.
• Electrical characteristics--this includes driver and
receiver information for each method of attaching a
device to the teletypewriter adapter.
• Physical characteristics--this section provides
connector information and signal pin assignments.
~!!.~l2i~£ 2.!. !.n.t~.9!g!~g Qigi1g1 !1l1H!.!LQY.1I2Y1 199j;'y!g. This
chapter provides a qeneral description of the integrated
diqital input/output non-isolated feature. A block diagram
shows the reqisters and signal lines associated ~ith this
feature. The introduction includes a functional description
for: diqital input, digital output, and the external control
line s.
•
•
•
other sections of the chapter provide:
Operational characteristics--this section includes
timinq sequences for write diqital output and read
diqital input usinq external Eync.
Electrical characteristics--this includes driver and
receiver information for attaching the user's instrument
or device.
Physical characteristics--this section provides
connector information and siqnal pin assignments at the
connectors for the digital I/O fea ture and a t the
connectors for the customer access panel feature.
*Electronic Industries Association
2001 Eve Street. N.W.
Washington, D.C. 20006
Preface ix