Motorola 6809 and Mac - In order to integrate the assembly in a workflow I can manage from within the editor (IDE is a bit far fetched) I found an excellent 6809/6309
1x Motorola 6809 CPU - NOS MC68B09EP DIP40 Tested - Fast U.S. Shipping | eBay
Motorola 6809 microprocessor family
Motorola 6809: Most Up-to-Date Encyclopedia, News & Reviews
motorola :: dataSheets :: 6809 : Free Download, Borrow, and Streaming : Internet Archive
Motorola 6809 microprocessor family
Motorola 6809 microprocessor family
Motorola 6809 - Wikipedia
GitHub - Ta0uf19/Motorola-6809-Cheatsheet: 💾 Motorola 6809 8-bit microprocessor CPU Instruction