I'll mention this even though it isn't exactly the Motorola 6800: I've been doing a lot of work recently with the Hitachi 6303, which is a member of Hitachi's f

I'll mention this even though it isn't exactly the Motorola 6800: I've been doing a lot of work recently with the Hitachi 6303, which is a member of Hitachi's family of Motorola 680x alternatives. The Hitachi 6303 is featured in a lot of 80s Japanese synthesisers, particularly Yamaha's DX/TX range. The Motorola 680x series also features in the Ensoniq ESQ family of synthesisers, probably many more. I became acquainted with this architecture disassembling the Yamaha DX7 firmware: https://github.com/ajxs/yamaha_dx7_rom_disassembly https://github.com/ajxs/yamaha_dx7_rom_disassembly It's a great instruction set to work with. It's my first experience with 8-bit programming, and I found it very intuitive.