---
layout: page
title: Intel CPU Documentation
permalink: /pubs/pc/reference/intel/
---

Intel CPU Documentation
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### [8086 CPU](8086/)
 
### [8087 FPU](8087/)
 
### [80186 CPU](80186/)
 
### [80286 CPU](80286/)
 
 * [80286 Errata](80286/#errata)
 * [80286 Undocumented Instructions](80286/#undocumented-instructions)
	 * [LOADALL](80286/loadall/)
 * [80286 Real-Mode Emulation Notes](80286/#real-mode-emulation-notes)

### [80386 CPU](80386/)
 
 * [80386 Errata](80386/#errata)
 * [80386 Steppings](80386/#steppings)
 * [80386 Undocumented Instructions](80386/#undocumented-instructions)
	 * [LOADALL](80386/loadall/)
	 * [IBTS](80386/ibts_xbts/), [XBTS](80386/ibts_xbts/)

### Assorted Publications

[<img src="http://archive.pcjs.org/pubs/pc/reference/intel/iAPX_86_88_Users_Manual--1981/thumbs/iAPX_86_88_Users_Manual--1981.jpg" width="200" height="260" alt="iAPX 86,88 User's Manual (1981)"/>](http://bitsavers.trailing-edge.com/pdf/intel/_dataBooks/1981_iAPX_86_88_Users_Manual.pdf)
[<img src="http://archive.pcjs.org/pubs/pc/reference/intel/iAPX_286_Hardware_Reference--1983/thumbs/iAPX_286_Hardware_Reference--1983.jpg" width="200" height="260" alt="iAPX 286 Hardware Reference (1983)"/>](http://bitsavers.trailing-edge.com/pdf/intel/_dataBooks/1983_iAPX_286_Hardware_Reference.pdf)
[<img src="http://archive.pcjs.org/pubs/pc/reference/intel/iAPX_286_Operating_System_Writers_Guide--1983/thumbs/iAPX_286_Operating_System_Writers_Guide--1983.jpg" width="200" height="260" alt="iAPX 286 OS Writer's Guide (1983)"/>](http://bitsavers.trailing-edge.com/pdf/intel/_dataBooks/1983_iAPX_286_Operating_System_Writers_Guide.pdf)
[<img src="http://archive.pcjs.org/pubs/pc/reference/intel/iAPX_286_Programmers_Reference_Manual--1985/thumbs/iAPX_286_Programmers_Reference_Manual--1985.jpg" width="200" height="260" alt="iAPX 286 Programmer Reference (1985)"/>](http://bitsavers.trailing-edge.com/pdf/intel/_dataBooks/1985_iAPX_286_Programmers_Reference_Manual.pdf)
[<img src="http://archive.pcjs.org/pubs/pc/reference/intel/80286/progref/thumbs/80286_and_80287_Programmers_Reference_Manual_1987 1.jpeg" width="200" height="260" alt="80286/80287 Programmer Reference (1987)"/>](80286/progref/)