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DCB Device Control Block

typedef struct tagDCB {
    BYTE Id;                Internal Device ID
    WORD BaudRate;          Baudrate at which running
    BYTE ByteSize;          Number of bits/byte, 4-8
    BYTE Parity;            Values defined below
    BYTE StopBits;          Values defined below
    WORD RlsTimeout         Timeout for RLSD to be set
    WORD CtsTimeout;        Timeout for CTS to be set
    WORD DsrTimeout;        Timeout for DSR to be set

    BYTE fBinary: 1;        Binary Mode (skip EOF check
    BYTE fRtsDisable:1;     Don't assert RTS at init time
    BYTE fParity: 1;        Enable parity checking
    BYTE fOutxCtsFlow:1;    CTS handshaking on output
    BYTE fOutxDsrFlow:1;    DSR handshaking on output
    BYTE fDummy: 2;         Reserved
    BYTE fDtrDisable:1;     Don't assert DTR at init time

    BYTE fOutX: 1;          Enable output X-ON/X-OFF
    BYTE fInX: 1;           Enable input X-ON/X-OFF
    BYTE fPeChar: 1;        Enable Parity Err Replacement
    BYTE fNull: 1;          Enable Null stripping
    BYTE fChEvt: 1;         Enable Rx character event.
    BYTE fDtrflow: 1;       DTR handshake on input
    BYTE fRtsflow: 1;       RTS handshake on input
    BYTE fDummy2: 1;

    char XonChar;           Tx and Rx X-ON character
    char XoffChar;          Tx and Rx X-OFF character
    WORD XonLim;            Transmit X-ON threshold
    WORD XoffLim;           Transmit X-OFF threshold
    char PeChar;            Parity error replacement char
    char EofChar;           End of Input character
    char EvtChar;           Recieved Event character
    WORD TxDelay;           Amount of time between chars
} DCB;

Values for Parity:              Values for StopBits:

        NOPARITY                    ONESTOPBIT
        ODDPARITY                   ONE5STOPBITS
        EVENPARITY                  TWOSTOPBITS
        MARKPARITY
        SPACEPARITY