CoCo was my first computer, too. The manual taught me to program. There were listing in the back pages with BASIC code with DATA statements that were the op-c

CoCo was my first computer, too. The manual taught me to program. There were listing in the back pages with BASIC code with DATA statements that were the op-codes to the 6809E machine language. It did funky stuff to get you into High Resolution graphics. I remember buying the Assembly Language cartridge as soon as it came out. Prior to that I was hand-coding machine code manually, using a the 6800 instruction set which similar because that's all I could find at the local electronics store. Some of the opcodes were not the same.. and couldn't figure out why it wouldn't work for days. Hell of a way to learn how to code.