Motorola HC12 - Manual (Page 285)

Assembler Messages
Message Codes
MCUez HC12 Assembler User’s Manual
MOTOROLA Assembler Messages 285
12.3.45 A12001: Illegal Addressing Mode
Type: Error
Description: An illegal addressing mode has been detected in an instruction.
This can be generated when an incorrect encoding is used for
an addressing mode.
Example:
LDD [D X]
LDD [D, X
ANDCC $FA
Tip: Use a valid notation for the addressing mode encoding.
Example:
LDD [D, X]
ANDCC #$FA