List of modifications/additions to the code
-------------------------------------------

7, May, 1996, Sanjay
--------------------
1. Introduced two new functions start_dialout_on_port() and 
   stop_dialout_on_port() for dialout support.

8, May, 1996, Sanjay
--------------------

Major changes all over the places

- to differentiate dialout from the chat via telnet or SMC case
- to allow for simultaneous chat to different ports; this tripled
  the number of buffers used

1st Feb 97
----------
- Fixed the rts_enable() and rts_disable().
  Introduced another variable, num_scheduled_rx_buf to keep track of
  the number of buffers scheduled already for receive. The sum of this
  and num_free_rx_buf gives the number of buffers that are actually free
  for receive.

- In chat_receive_wan_packet(), the check for number of free buffers was done
  first and then the free buffer count was incremented. Now, they are reordered.

- CHATINIT.C : initialize_chat_rxtx_descriptors() :
  If init fails due to lack of buffers, the alloced ones were not being
  freed resulting in memory getting leaked out.

- CHATINIT.C 17/07/1997 port_number passed here is 1-based.
        So, to set_wan_port_owner() we need to pass (port_number -1)

- CHATSCC.68K 21/7/97 Chetan
		  Initialization Of SCC INTs changed based on VBR value


06/01/1998 Sachin
-----------------
        Programming the WAN port for chat was wrong. It use to hardcode
        it to a0. Now we call the GetBaudDivisor() which is coded
        in wandrv\waninit.c
