HC08 blink.c example, compile with SDCC 3.6.0
physical onboard coding and verified code sample, QT4 is used,
https://github.com/xiaolaba/HC08_SDCC_BLINK_C/tree/master/HC08QT4_c_blink_sdcc360_test
firmware https://github.com/xiaolaba/HC08_SDCC_BLINK_C/blob/master/HC08QT4_c_blink_sdcc360_test/qt4_blink.S19