Format of Access Server configuration parameter block:
Offset	Size	Description	)
 00h	BYTE	receive baud rate index
		00h 50 bps, 01h 75 bps, 02h 110 bps, 03h 134.5 bps,
		04h 150 bps, 05h 300 bps, 06h 600 bps, 07h 1200 bps,
		08h 1800 bps, 09h 2000 bps, 0Ah 2400 bps, 0Bh 3600 bps,
		0Ch 4800 bps, 0Dh 7200 bps, 0Eh 9600 bps, 0Fh 19200 bps,
		10h 38400 bps, 11h 57600 bps, 12h 115200 bps
 01h	BYTE	receive bits per character (0=5 bits..3=8 bits)
 02h	BYTE	receive stop bits
 03h	BYTE	receive parity
		00h none, 01h odd, 02h even, 03h mark, 04h space
 04h	BYTE	transmit baud rate index (same as receive baud rate)
 05h	BYTE	transmit bits per character (0=5 bits..3=8 bits)
 06h	BYTE	transmit stop bits
 07h	BYTE	transmit parity (same as receive parity)
 08h	BYTE	DTR state (00h off, 01h on)
 09h	BYTE	RTS state (00h off, 01h on)
 0Ah	BYTE	flow control (00h none, 01h XON/XOFF, 02h RTS/CTS, 03h both)
 0Bh	BYTE	break control (00h off, 01h on)