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The '''IBM Personal System/2 Hardware Interface Technical Reference''', '''First Edition (May 1988)''', is IBM's 625-page family-wide hardware interface reference for the PS/2 line. It is the volume the thin model-specific technical references tell you to read alongside them: everything common to the family lives here.
The '''IBM Personal System/2 Hardware Interface Technical Reference''' is IBM's 625-page family-wide interface reference for the Micro Channel PS/2 models, First Edition, May 1988. The preface describes it as the manual for functions and architecture common to several PS/2 models, to be used with the model-specific technical references and the ''PS/2 and PC BIOS Interface Technical Reference''. In it, Type 1 means the initial hardware design level of a function, and Type 2, Type 3 and so on the later levels (preface, p. ii).


== What it contains ==
== Contents ==
Each section has its own contents, page numbering and index. PDF page numbers of each section's contents page:
{| class="wikitable"
! Section !! PDF page
|-
| Micro Channel Architecture: channel definition, signal descriptions and connectors for the 16-bit, 32-bit, matched-memory and auxiliary video extension sections, bus ownership and arbitration, channel support, level-sensitive interrupt sharing, and critical timing (transfer, DMA, arbitration and configuration cycles) || 8
|-
| Programmable Option Select: adapter setup, configuration utilities and adapter description files || 84
|-
| Micro Channel Adapter Design: dimensions, power requirements and design guidelines || 110
|-
| Microprocessors and Instruction Sets || 138
|-
| Direct Memory Access Controller (Type 1) || 246
|-
| Interrupt Controller (Type 1) || 260
|-
| System Timers (Type 1) || 276
|-
| Diskette Drive Controller (Type 1) || 296
|-
| Keyboard and Auxiliary Device Controller || 332
|-
| Serial Port Controller (Types 1 and 2) || 350
|-
| Parallel Port Controller (Type 1) || 378
|-
| Video Subsystem (Type 1), the VGA || 388
|-
| Keyboards (101- and 102-Key) || 506
|-
| Characters and Keystrokes || 564
|-
| Power Supply (Types 1 and 2) || 576
|-
| Power Supply (Type 3) || 584
|-
| Compatibility || 590
|-
| Bibliography || 622
|}


* '''Micro Channel architecture in full''' — the channel definition; signal descriptions for the 16-bit, 32-bit, matched-memory and auxiliary video extension sections; the connector pinouts for all four; and the channel signal groups.
== What this manual does not contain ==
* '''Bus ownership and arbitration''' — the central arbitration control point, local arbiters, preemption, programmable fairness and the inactive state, and the arbitration bus priority assignments.
It is a programming and interface reference, not a service manual: no FRUs, removal procedures, symptom index, schematics or component values. BIOS is in the separate BIOS Interface Technical Reference. It predates XGA, so video is the VGA only. By October 1990 IBM had divided this material into the ''Architectures'' and ''Common Interfaces'' volumes.
* '''Channel support''' — the address bus translator, data bus steering and level-sensitive interrupt sharing.
* '''Micro Channel critical timing parameters''' — basic transfer cycle, simplified basic transfer cycle, I/O and memory cycle, and the default cycle.
* System-specific implementation and performance notes, and a '''Compatibility''' chapter for developers moving code from the PC line.
 
== What it does not contain ==
 
Not a service manual: no FRUs, no removals, no symptom-to-FRU index, no component values and no schematics. It also does not cover BIOS — that is in [[IBM PS2 and PC BIOS Interface Technical Reference|the BIOS Interface Technical Reference]] — and it predates XGA, so the video chapters cover VGA only.
 
By October 1990 IBM had split this book into two: ''Architectures'' and ''Common Interfaces''. Only the Common Interfaces volume is hosted here.


== What it settles ==
== What it settles ==
The power supply sections define three DC outputs, +5, +12 and −12 V, for the Micro Channel supplies of Types 1, 2 and 3. A short on any output, or an internal overvoltage before any output exceeds 130 % of nominal, latches all outputs off; the supply restarts only after the fault is removed and the power switch has been off for at least ten seconds (PDF pp. 579 and 587). The Type 1 supply plugs into the system board through a 50-pin card-edge connector, the Type 2 through a 15-pin connector with two 4-pin fixed disk connectors, and the Type 3 through a 12-pin connector (J7) and a 6-pin connector (J14) (PDF pp. 580-581 and 588).


If a PS/2 adapter does not work in a particular slot, this is the book that says why: it defines which slots carry the matched-memory extension, which carry the auxiliary video extension, and what a card may draw. It is also the source for the arbitration priority assignments used when diagnosing a bus-master card that starves the system.
== Pages that cite this document ==
* [[IBM PS2 Model 55SX HITR Supplement]] and [[IBM PS2 Model 65SX HITR Supplement]] file into this binder.
* [[IBM PS2 Model P70 Technical Reference (April 1989)]], [[IBM PS2 and PC BIOS Interface Technical Reference]], [[IBM PS2 Micro Channel OEM Hardware Product Guide (May 1988)]], [[IBM PS2 HW Interface Technical Reference - Common Interfaces (October 1990)]] and [[IBM PS2 HW Interface Technical Reference - Video Subsystems (September 1992)]] list it as a related volume.


<pdf> File:IBM PS2 Hardware Interface Technical Reference May88.pdf </pdf>
<pdf> File:IBM PS2 Hardware Interface Technical Reference May88.pdf </pdf>


Download it here: [[:File:IBM PS2 Hardware Interface Technical Reference May88.pdf|IBM PS2 Hardware Interface Technical Reference May88.pdf]]
Download: [[:File:IBM PS2 Hardware Interface Technical Reference May88.pdf|IBM PS2 Hardware Interface Technical Reference May88.pdf]]
 
== Related pages ==
 
* [[IBM PS2 HW Interface Technical Reference - Common Interfaces (October 1990)]] &middot; [[IBM PS2 HW Interface Technical Reference - Video Subsystems (September 1992)]]
* [[IBM PS2 and PC BIOS Interface Technical Reference]] &middot; [[IBM PS2 Micro Channel OEM Hardware Product Guide (May 1988)]]
* [[IBM PS2 Model 55SX HITR Supplement]] &middot; [[IBM PS2 Model 65SX HITR Supplement]] &middot; [[IBM PS2 Model P70 HITR Supplement]] &mdash; the loose-leaf updates that file into this binder


[[Category:IBM Service Manuals]]
[[Category:IBM Service Manuals]]
[[Category:Service Manuals]]
[[Category:Service Manuals]]

Revision as of 21:34, 30 September 2026

The IBM Personal System/2 Hardware Interface Technical Reference is IBM's 625-page family-wide interface reference for the Micro Channel PS/2 models, First Edition, May 1988. The preface describes it as the manual for functions and architecture common to several PS/2 models, to be used with the model-specific technical references and the PS/2 and PC BIOS Interface Technical Reference. In it, Type 1 means the initial hardware design level of a function, and Type 2, Type 3 and so on the later levels (preface, p. ii).

Contents

Each section has its own contents, page numbering and index. PDF page numbers of each section's contents page:

Section PDF page
Micro Channel Architecture: channel definition, signal descriptions and connectors for the 16-bit, 32-bit, matched-memory and auxiliary video extension sections, bus ownership and arbitration, channel support, level-sensitive interrupt sharing, and critical timing (transfer, DMA, arbitration and configuration cycles) 8
Programmable Option Select: adapter setup, configuration utilities and adapter description files 84
Micro Channel Adapter Design: dimensions, power requirements and design guidelines 110
Microprocessors and Instruction Sets 138
Direct Memory Access Controller (Type 1) 246
Interrupt Controller (Type 1) 260
System Timers (Type 1) 276
Diskette Drive Controller (Type 1) 296
Keyboard and Auxiliary Device Controller 332
Serial Port Controller (Types 1 and 2) 350
Parallel Port Controller (Type 1) 378
Video Subsystem (Type 1), the VGA 388
Keyboards (101- and 102-Key) 506
Characters and Keystrokes 564
Power Supply (Types 1 and 2) 576
Power Supply (Type 3) 584
Compatibility 590
Bibliography 622

What this manual does not contain

It is a programming and interface reference, not a service manual: no FRUs, removal procedures, symptom index, schematics or component values. BIOS is in the separate BIOS Interface Technical Reference. It predates XGA, so video is the VGA only. By October 1990 IBM had divided this material into the Architectures and Common Interfaces volumes.

What it settles

The power supply sections define three DC outputs, +5, +12 and −12 V, for the Micro Channel supplies of Types 1, 2 and 3. A short on any output, or an internal overvoltage before any output exceeds 130 % of nominal, latches all outputs off; the supply restarts only after the fault is removed and the power switch has been off for at least ten seconds (PDF pp. 579 and 587). The Type 1 supply plugs into the system board through a 50-pin card-edge connector, the Type 2 through a 15-pin connector with two 4-pin fixed disk connectors, and the Type 3 through a 12-pin connector (J7) and a 6-pin connector (J14) (PDF pp. 580-581 and 588).

Pages that cite this document

Download: IBM PS2 Hardware Interface Technical Reference May88.pdf

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