IBM 1 GB Microdrive Storage Card User manual

Series/1
GA34-0033-3
File No. S1-01
IBM Series/1
User's Attachment
Manual

GA34-0033-3
File No. $1-01
IBM Series/1
User's Attachment
Manual

Fourth Edition (September 1979)
This is a major revision of, and obsoletes, GA34-033-2 and Technical Newsletter GN34-0448.
This revision includes editorial and technical changes, which incorporate information about
the IBM 4952 Processor and the IBM General Purpose Interface Bus (GPIB) Adapter. Because
of the extensive changes, revision bars have been omitted; this manual should be reviewed in
its entirety.
Use this publication only for the purpose stated in the Preface.
Changes are periodically made to the information herein; any such changes will be reported in
subsequent revisions or Technical Newsletters.
It is possible that this material may contain reference to, or information about, IBM products
(machines and programs), programming, or services which are not announced in your country.
Such references or information must not be construed to mean that IBM intends to announce
such IBM products, programming, or services in your country.
Publications are not stocked at the address given below. Requests for copies of IBM publications
should be made to your IBM representative or the IBM branch office serving your locality.
This publication could contain technical inaccuracies or typographical errors. A form for readers’
comments is provided at the back of this publication. If the form has been removed, address your
comments to IBM Corporation, Systems Publications, Department 27T, P.O. Box 1328, Boca
Raton, Florida 33432. IBM may use and distribute any of the information you supply in any
way it believes appropriate without incurring any obligation whatever. You may, of course, con-
tinue to use the information you supply.
© Copyright International Business Machines Corporation 1976, 1977, 1979

Related Publications
Preface
This publication provides reference information to aid in designing logic
for communicating with an IBM Series/1 processor through the
input/output channel and several designated user attachment features. This
information is intended primarily for experienced engineers or technicians.
This publication is also useful to customers who need detailed information
for connecting their instruments and devices to the various attachment
features.
The reader should have a working knowledge of the information in the
appropriate IBM Series/1 processor and processor features description
manual.
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.
This manual is organized as follows:
Chapter 1. Introduction describes the I/O channel and the user
attachment features.
Chapter 2. Processor I/O Channel describes the channel direct program
control (DPC) operations, cycle-steal (CS) operations, interrupts, and
initial program load (IPL).
Chapter 3. Timer Feature describes the timer feature, including signal
lines, interrupts, electrical characteristics, and physical characteristics.
Chapter 4. Teletypewriter Adapter Feature describes the teletypewriter
adapter feature, including interface options, timing sequences, electrical
characteristics, and physical characteristics.
Chapter 5. Integrated Digital Input/Output Feature describes the
integrated digital input/output feature, including operational, electrical,
and physical characteristics.
Chapter 6. Customer Direct Program Control (DPC) Adapter Feature
describes the customer direct program control adapter feature, including
operational, electrical, and physical characteristics.
Appendix A. General Purpose Interface Bus Adapter, RPQ D02118,
describes the Series/1 implementation of the digital interface contained in
IEEE Standard 488, including the commands and functions used by the
General Purpose Interface Bus (GPIB) Adapter.
Note: Installation instructions are shipped with each system order. These
instructions contain the information required for selecting options and
device addresses on the I/O attachment feature cards.
Additional publications are listed in the JBM Series/1 Graphic
Bibliography, GA34-0055.
Preface ili

iv GA34-0033

Chapter 1. Introduction 1-1
Processor I/O Channel 1-2
Channel Repower Feature 1-2
Channel Socket Adapter Feature 1-2
I/O Attachment Features 1-2
Timer Feature 1-2
Teletypewriter Adapter Feature 1-3
Integrated Digital Input/Output (1/0) Nonisolated
Feature 1-3
Customer Direct Program Control (DPC) Adapter
Feature 1-3
Customer Access Panel (CAP) Feature 1-3
General Purpose Interface Bus Adapter Feature 1-3
Chapter 2. Processor I/O Channel 2-1
Introduction 2-1
Functional Description of I/O Channel Signal Lines 2-2
Signal Line Groups 2-3
Functional Subsets of the Signal Lines 2-4
Service Group Line Definitions 2-7
Poll Group Line Definitions 2-12
Processor I/O Channel Operational Characteristics 2-15
Operational Sequences on the Channel 2-15
DPC Sequence Description 2-19
Interrupt-Service Sequence Description 2-22
Cycle-Steal Service Sequence Description 2-24
Poll Sequence Description 2-27
Processor-Initiated IPL Sequence Description 2-33
Host-Initiated IPL Sequence Description 2-36
Reset Sequences Description 2-39
Design Considerations for Operational Sequences 2-39
Operational Power Considerations 2-48
Processor I/O Channel Electrical Characteristics 2-50
Channel Signal Line Electrical Characteristics 2-50
Driver/Receiver Information 2-53
Other Attachment Considerations 2-65
Power Supply Electrical Characteristics 2-66
Processor I/O Channel Physical Characteristics 2-66
Signal Pin and Cable Assignments 2-66
I/O Channel Physical Components Description 2-70
Sequence of Plugging Device Attachments 2-73
Processor I/O Channel Attachment Features 2-73
Channel Repower Feature 2-73
Socket Adapter Feature 2-77
Chapter 3. Timer Feature 3-1
Introduction 3-1
Relationship to Other Features 3-3
Application Summary 3-3
Functional Description of the External Timer Signal
Lines 3-6
Signal Line Considerations 3-7
Application Sequences 3-7
Interval Timer 3-7
Pulse Counter 3-8
Contents
Pulse Duration Counter 3-8
Timer Feature Operational Characteristics 3-8
Interrupts 3-8
Interrupt Presentation 3-9
Status After Power Transitions and Resets 3-9
Timer Feature Electrical Characteristics 3-10
Timer Feature Physical Characteristics 3-11
Signal Pin Assignments 3-11
Pin Assignments Showing Customer Access Panel (CAP)
Connections 3-12
Jumper Selections 3-12
Timer Feature Design Considerations 3-12
Wiring Practices 3-12
Application Notes 3-12
Chapter 4. Teletypewriter Adapter Feature 4-1
Introduction 4-1
Relationship to Other Features 4-4
Application Summary 4-4
Data Transmission 4-11
Initial Program Load 4-12
Teletypewriter Adapter Operational Characteristics 4-12
Types of Receive Operations 4-13
Interrupt Presentation 4-14
Commands That Initiate Receive and Transmit
Operations 4-15
Transmit Operations 4-16
Receive Operations 4-17
Read Control and Write Control 4-20
System-Related Characteristics 4-21
Teletypewriter Adapter Electrical Characteristics 4-22
Teletypewriter Adapter Communications Lines 4-22
Driver/Receiver Information 4-26
Power Supplies 4-28
Teletypewriter Adapter Physical Characteristics 4-29
Physical Description 4-29
Signal Pin Assignments 4-29
Teletypewriter Adapter Design Considerations 4-30
Teletypewriter Device Information 4-30
Cable Connection to the Teletypewriter Adapter 4-30
Customer Access Panel (CAP) Connections 4-33
Chapter 5. Integrated Digital Input/Output Feature 5-1
Introduction 5-1
Digital Input (DI) 5-1
Digital Output (DO) 5-4
Integrated Digital I/O Operational Characteristics 5-4
Digital Output Operation 5-4
Digital Input Operation 5-6
Integrated Digital I/O Electrical Characteristics 5-7
Digital Input (DI) Characteristics 5-7
Digital and ‘External Sync’ Input Specifications 5-7
Digital Output (DO) Characteristics 5-8
Digital and ‘Ready’ Output Specifications 5-9
Integrated Digital I/O Physical Characteristics 5-9
Signal Pin Assignments 5-9
Contents Vv

Integrated Digital I/O to Customer Access Panel
Connections 5-12
Jumper Selections 5-17
Integrated Digital I/O Design Considerations 5-18
Application Notes 5-18
Chapter 6. Customer Direct Program Control (DPC) Adapter
Feature 6-1
Introduction 6-1
Relationship to Other Features 6-1
Application Summary 6-2
Functional Description of the DPC Adapter Signal Lines 6-3
1/O Active 6-3
Function Bits 6-4
Modifier Bits 6-4
Device Address 6-4
Data Bus Out 6-5
Interrupt Service Active 6-5
Strobe 6-5
Data BusIn 6-6
Interrupt Request 6-6
Condition CodeIn 6-6
Select Response 6-6
Halt or MCHK 6-7
System Reset 6-7
Power-On Reset 6-7
Diagnostic Mode and Diagnostic Mode Modifier 6-7
DPC Adapter Operational Characteristics 6-8
Output Sequence 6-8
Input Sequence 6-9
Interrupt-Service Sequence 6-10
DPC Adapter Electrical Characteristics 6-11
Drivers 6-1]
Receivers 6-12
DPC Adapter Physical Characteristics 6-13
Signal Pin Assignments 6-13
DPC Adapter to Customer Access Panel Connections 6-17
Jumper Selections 6-21
DPC Adapter Design Considerations 6-22
Application Notes 6-22
Appendix A. General Purpose Interface Bus Adapter
(RPQ DO2118) A-1
Introduction A-]
Adapter Functional Description A-1
Adapter Hardware Description A-2
Adapter Command Functions A-2
Application Summary A-5
Implementation of IEEE Standard 488 A-5
Index X-]
vi GA34-0033

Chapter 1. Introduction
A variety of interfaces are provided for attachment of the user’s own
input/output (I/O) devices and instruments to an IBM Series/1 processor.
Serial and parallel data paths, and a multifunction timer are provided. The
user may choose one of the I/O adapter features or design an I/O adapter
to communicate directly with the processor I/O channel.
Figure 1-1 shows the various methods of attachment and the available
attachment features. Each attachment is described in subsequent sections
of this chapter.
rs T4 Oo 4 ooo FF
| User's time , l Users ! .
| or count | instrument(s)/ | User S |
' dependen | device(s) device
i Signals __ “To “yO
Integrated .
Timer digital I/O ~ Telety pewriter
feature non-isolated adapter feature
Processor feature
Channel I/O channel ( |
controls
7/
Customer Channel
Channel
socket
DPC
adapter
repower
adapter
feature
feature
feature
i ) I/O
I User's channel
i
attachment
a
+
| card r r
Soa
saposes
—
|
Users
|
|
User's
r—
| device | | I/O adapter a
| |
_J. Le J LL we eH eH)
— L- ~
to other
pon
!
1
-———
ea
1
_
TTT
I/O
adapters
; User’s | ! User’s | | User’s |
| device | ‘device ) | device |
I
L—__ J Loe J Lo J
Figure 1-1. Relationship of user attachments to the processor I/O channel
Introduction 1-1

Processor I/O Channel
Input/output devices are attached to the processor through the I/O
channel. The channel, which can accommodate 256 device addresses, (1)
directs the flow of information between the I/O devices and main storage
and (2) contains the facilities for the control of the I/O operations. The
channel is asynchronous, with multidropped lines that link the processor
resource to its external facilities. I/O channel architecture includes
address, control, and data signal lines.
Channel Repower Feature
The channel repower feature isolates and redrives the I/O channel signal
and tag lines. The feature is used to extend the channel beyond the
processor enclosure.
Channel Socket Adapter Feature
The channel socket adapter feature consists of an IBM printed circuit card
that plugs into the backpanel of an IBM Series/1 processor or the IBM
4959 I/O Expansion Unit. The top edge of the IBM printed circuit card
has an industry-standard connector that accepts the user’s I/O adapter
card. To power the user’s circuits, +5 volts dc at 3 amperes, maximum, is
available at the connector.
I/O Attachment Features
The following I/O attachment features are available:
e Timer feature
e Teletypewriter adapter feature
e Integrated digital I/O nonisolated feature
e Customer direct program control (DPC) adapter feature
Timer Feature
The timer feature card has two separately addressable 16-bit timers. If
desired, time base and gating signals can be supplied, by the user, through
a connector on the top of the card.
Each timer can generate periodic or aperiodic interrupts with or without
the external gate.
Each timer can operate as an interval timer or pulse counter, or it can
operate as a self-contained pulse duration counter with end interrupt.
1-2 GA34-0033

Teletypewriter Adapter Feature
The teletypewriter adapter feature card provides a way of attaching a
serial I/O device. This feature provides a logical subset of the Electronic
Industries Association (EIA) RS232-C interface. Full-duplex operation and
initial program load (IPL) are supported by the adapter.
Attachment to a teletypewriter is by a dc-current loop (isolated or
nonisolated). Two other attachment options are offered: a TTL-compatible
interface and an EIA voltage-level interface.
Integrated Digital Input/Output (I/O) Nonisolated Feature
The integrated digital I/O nonisolated feature card contains:
¢ Two 16-point groups of nonisolated digital input/process interrupt
(DI/PI)
« Two 16-point groups of nonisolated digital output (DO)
Each group of DI/PI and DO has a ‘ready’ and a ‘sync’ line for
synchronizing operations with attached devices. The digital points for each
group and their associated ‘ready’ and ‘sync’ lines are available at three
top-card connectors.
Customer Direct Program Control (DPC) Adapter Feature
The direct program control (DPC) adapter feature card supplies a logical
subset of the I/O channel architecture. This feature provides a convenient
means of attaching I/O devices and subsystems to an IBM Series/1
processor, The interface circuits are TTL compatible. The adapter is
designed to perform direct program control functions only. The feature
card can be configured to accommodate 4, 8, or 16 I/O device addresses.
The adapter allows for interrupt vectoring of 16 interrupt sources.
There are 75 signal lines. These include: 18 data bus out, 18 data bus in,
16 interrupt request in, three function bits, four modifier bits, four device
address bits, and 12 control and response lines. The data flow is always 16
bits without parity option or 18 bits with parity option (two parity bits).
User attachment is through three top-card connectors.
Customer Access Panel (CAP) Feature
The customer access panel (CAP) feature provides an assembly for
mounting optional, quick-disconnect-type connectors for I/O equipment.
The assembly can accommodate one timer connector, one teletypewriter
connector, and up to four connectors for either the integrated digital I/O
feature or the customer direct program control (DPC) feature.
The assembly mounts to the standard EIA RS310B rack-mounting screw
holes at the rear of the enclosure frame.
General Purpose Interface Bus Adapter Feature
The IBM Series/1 General Purpose Interface Bus (GPIB) Adapter, RPQ
D02118, provides a 65K-byte cycle-steal interface for attaching up to 14
digital I/O devices to an IBM Series/1 processor. The devices attached via
the GPIB adapter must conform to the requirements described in IEEE
Standard 488-1978.
Introduction 1-3