John >> Does that mean that when I use IND$FILE with a 64x128 screen it sends 8192 >> bytes at a time ?
> I think so. But remember that those 8192 bytes must include any require 3270 > protocol overhead bytes. Assuming my analysis of the significance of *not* being able to use "Write Structured Field" (WSF) commands is correct, no, there is no "protocol overhead". > So that is not 8192 bytes of user data. Assuming ..., again no, it is all "user data". A "coax-attached" emulator behaving as a "Control Unit Terminal" will necessarily "see" outbound only "digested" "user data". Any "protocol overhead" will have been intercepted by the 3270 control unit. Even if not "coax-attached", the "user data" data stream will map to the defined presentation space dimensions but there's no reason that the presentation space dimensions need limit the request unit. > Also, from what another person indicated, I don't know if the screen size > limit applies if you are using DFT mode transfers. Assuming ... and interpreting "DFT mode transfers" as "transfers where the use of WSF has been authorised" - or something like that!, there would appear to be no reason why the presentation space dimensions need limit anything! Note that, while there are *two* modes of operation for an IND$FILE server, there are *three* modes of operation for an IND$FILE client. Chris Mason On Wed, 19 Sep 2012 09:22:43 -0500, McKown, John <[email protected]> wrote: >I think so. But remember that those 8192 bytes must include any require 3270 >protocol overhead bytes. Also remember the data bytes may be encoded. So that >is not 8192 bytes of user data. Also, from what another person indicated, I >don't know if the screen size limit applies if you are using DFT mode >transfers. > >-- >John McKown > >> -----Original Message----- >> From: IBM Mainframe Discussion List [mailto:[email protected]] >> On Behalf Of Thomas Berg >> >> Does that mean that when I use IND$FILE with a 64x128 screen it sends >> 8192 bytes at a time ? >> >> >> Regards, >> Thomas Berg ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
