Today, I executed the first line of code on the SNES which was actually stored in an array in the firmware for the STM32! Felt like landing on the moon tbh. :D This means, a very important part of the firmware is done and working. I am now able to store 65816 instructions in the STM32 memory and have them executed on real hardware.
Coming up is firmware for the SNES to get some sounds from the SPC-700! Stay tuned!