From c6b311b84ab56643bcbdd66c1233fc5d19d0c061 Mon Sep 17 00:00:00 2001
From: Thomas Harte <thomas.harte@gmail.com>
Date: Fri, 6 Oct 2023 11:10:54 -0400
Subject: [PATCH] Explain source of comments.

---
 .../x86/Implementation/PerformImplementation.hpp          | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/InstructionSets/x86/Implementation/PerformImplementation.hpp b/InstructionSets/x86/Implementation/PerformImplementation.hpp
index eb879db40..09c49cbaf 100644
--- a/InstructionSets/x86/Implementation/PerformImplementation.hpp
+++ b/InstructionSets/x86/Implementation/PerformImplementation.hpp
@@ -55,6 +55,14 @@ IntT overflow(IntT lhs, IntT rhs, IntT result) {
 // END COPY AND PASTE SECTION.
 //
 
+//
+// Comments below on intended functioning of each operation come from the 1997 edition of the
+// Intel Architecture Software Developer’s Manual; that year all such definitions still fitted within a
+// single volume, Volume 2.
+//
+// Order Number 243191; e.g. https://www.ardent-tool.com/CPU/docs/Intel/IA/243191-002.pdf
+//
+
 void aaa(CPU::RegisterPair16 &ax, Status &status) {
 	/*
 		IF ((AL AND 0FH) > 9) OR (AF = 1)