Some revived projects:
rs232c
rfid
Some links that are embedded in the device, as seen by Windows file manager
link 1 stm link stm8 useful
link 2
link 3
see also :
OpenSource version
ARM toolchain
openstm32 toolchain
tips on register usage
discovery board : led & serial
stm8flash -l | ag stm8s105
schematic here