INT 60 u - HP 95LX System Manager - SEND DATA OVER COMM CHANNEL
        DI = 0E08h
        STACK:  2 WORDs unused dummies (for calls from high level languages)
                WORD    comm channel handle
                DWORD   pointer to data to be sent
                WORD    option flags
                        bit 0: send partial buffer
                        bit 1: turn on receiver after sending
                DWORD   pointer to WORD containing length of data to be sent
Return: length WORD updated to contain number of bytes actually sent???
        STACK unchanged
SeeAlso: INT 60/DI=0E09h,INT 60/DI=0E0Bh