UPDATE# IBM MAINFRAME FILE TRANSFER

Correct implementation of "Doomsday Kermit" (DDK) techniques for transferring
files with IBM mainframes through 3270 protocol converters that do NOT support
transparent mode, to be used in conjunction with IBM Mainframe Kermit's SET
CONTROLLER FULLSCREEN command on VM/CMS, MVS/TSO, or CICS.  IBM Mainframe
Kermit 4.2.3 or later required.	 Commands:
	
  SET PARITY EVEN	 ; Or whatever
  SET FLOW XON/XOFF	 ; Or whatever
  SET SEND START 62	 ; Greater-than sign
  SET RECEIVE START 62	 ; Ditto
  SET BLOCK BLANK-FREE-2 ; New block-check type
  SET HANDSHAKE NONE

BLANK-FREE-2 is a new block-check type, exactly like type 2, except encoded
to never contains blanks.  Give IBM Mainframe Kermit the following commands:

  SET CONTROLLER FULL
  SET SEND START 62
  SET RECEIVE START 62
  SET BLOCK BLANK-FREE-2
  SET HANDSHAKE 0

Doomsday Kermit file transfers are not as reliable as regular Kermit protocol
transfers, and they are much slower.  Use this method only as a last resort.


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