diff --git a/Instruction-Encoding.md b/Instruction-Encoding.md
index 0f93582..df4e112 100644
--- a/Instruction-Encoding.md
+++ b/Instruction-Encoding.md
@@ -39,4 +39,26 @@ If either the destination or source require a 16-bit immediate value as part of
 
 | Word 0 | Word 1 | Word 2 |
 | --- | --- | --- |
-| Basic Instruction | *Source operand* | *Destination operand* |
\ No newline at end of file
+| Basic Instruction | *Source operand* | *Destination operand* |
+
+## Abstract instructions
+As there is a limited amount of opcodes some (abstract) instructions can have an encoding different from the regular format.
+
+### SETcc
+The [`SETcc`](http://www.ousob.com/ng/iapx86/ng22d84.php) instruction family is implemented with the single opcode `0x32`. It uses the *Source operand* word to encode its family opcode.
+
+| instruction | family opcode |
+| SETA | 0x01 |
+| SETAE | 0x02 |
+| SETBE | 0x03 |
+| SETB | 0x04 |
+| SETE | 0x05 |
+| SETNE | 0x06 |
+| SETG | 0x07 |
+| SETGE | 0x08 |
+| SETLE | 0x09 |
+| SETL | 0x0A |
+| SETO | 0x0B |
+| SETNO | 0x0C |
+| SETS | 0x0D |
+| SETNS | 0x0E |
\ No newline at end of file