I made some minor code changes to lesson21, lesson22, and lesson23, to fix potential bugs. Specifically added LDX#0 in the NMI code and on rand8(). Also, touched up the face on lesson23.
And, I made some more changes…to the same .zip files. I changed all the .cfg files.
cc65 CFG Files for the most common mappers
AXROM, BNROM, CXROM, MMC1, MMC2, MMC3, MMC5, NROM, and UNROM.