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Jeff Parsons 2015-12-10 09:11:46 -08:00
commit d46fec026c
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pubs/pc/reference/intel/80286/early_errata/README.md
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@ -1,5 +1,13 @@
Exceptions from Undefined Opcodes and String Instructions
---
layout: page
title: "Intel 80286 CPU Documentation: Early Errata"
permalink: /pubs/pc/reference/intel/80286/early_errata/
---
Intel 80286 CPU Documentation
---
### Exceptions from Undefined Opcodes and String Instructions
The exception 13 handler will probably use a lookup table for the opcode byte of the instruction causing exception
13 to determine the correct action for this instruction. In general, any undefined opcode causes exception 6 and
@ -94,4 +102,4 @@ steppings of the 80286 and are fixed in later steppings of the 80286.
extension data transfers should be inhibited while [LOADALL](../loadall/) is running. Later steppings of the 80286 will correctly
load the MSW during [LOADALL](../loadall/) with HOLD and processor extension transfers.
[This information is from an undated 15-page Intel document titled "Undocumented iAPX 286 Test Instruction"]
[This information is from an undated 15-page Intel document titled "Undocumented iAPX 286 Test Instruction"]