Fix handling of code writes for Z80 core. This seems to get things close to being back to where they were before the big refactor that broke the Z80 core. Some problems remain. Notably the sound driver in Sonic 2 is still quite broken.

syntax: glob
*.dis
*.asm
*.bin
*.png
*.jpg
*.pdf
*.tar.gz
*.list
*~
starscream/*
gxz80/*
musashi/*
vdpreverse/*
nemesis/*
html/*
generated_tests/*
ztests/*
*.o
blastem
dis
stateview
trans
zdis
ztestrun
address.log