FM" (Japanese)* Hirotsugu Kakugawa's original "Secret 6309 features memo" and thread on Google's Usenet archive* HD63B09EP Technical Reference Guide* 6x09 Microprocessor Instruction Sets* Instruction set reference for 6809/6309 (PDF) By Chris Lomont
FM" (Japanese)* Hirotsugu Kakugawa's original "Secret 6309 features memo" and thread on Google's Usenet archive* HD63B09EP Technical Reference Guide* 6x09 Microprocessor Instruction Sets* Instruction set reference for 6809/6309 (PDF) By Chris Lomont