Der Buffer für Serialin
_RS_HEAD_PTR0 , a byte counter that stores the head of the buffer
_RS_TAIL_PTR0 , a byte counter that stores the tail of the buffer.
_RS232INBUF0 , an array of bytes that serves as a ring buffer for the received characters.
Der Buffer für Serialout
_RS_HEAD_PTRW0 , byte that stores the head of the buffer
_RS_TAIL_PTRW0 , byte that stores the tail of the buffer
_RS232OUTBUF0, array of bytes for the ring buffer that stores the printed data.
Mit vergleichen Head / Tail kannst du sehen was voll und was leer ist
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