Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!shadooby!samsung!zaphod.mps.ohio-state.edu!mips!apple!agate!ucbvax!UCONNVM.BITNET!JEWIL From: JEWIL@UCONNVM.BITNET Newsgroups: comp.dcom.modems Subject: ZModem for VM/CMS Message-ID: <8912230806.AA15648@ucbvax.Berkeley.EDU> Date: 23 Dec 89 03:07:38 GMT Sender: daemon@ucbvax.BERKELEY.EDU Organization: The Internet Lines: 35 Greetings, I recently posted an inquiry to this and other lists looking for information on the ZModem possibilities on VM/CMS. This is a report my findings and a thank you note to those who added there twenty-five cents worth. ZModem for VM/CMS does not exist. The primary reason is that most mainframe communications take place at 7 bits. (The only exception that I know of is ASU which expects 8 bits.) If Z could be implemented it would offer significant savings, even as compared to the best available file transfer protocol (Kermit with the packet size set to 1K). The universally held opinion is that ZModem needs 8 bits and cannot be modified to run on 7 (this information confirmed by a high Z source [thanx Jeff]). Therefore until many of the mainframe systems (including UConn) follow ASU's lead and switch to 8 bits (hint Steve) there is not likely to be a ZModem for VM/CMS. My thanks to all those who shared what they knew and my apologies for taking so long to respond. S. ================================================================= Stephen J. Williams 12 September Road SWILLIAM@UCONNVM.BITNET Storrs JEWIL@UCONNVM.BITNET Connecticut 06268-2806 (203) 456-1268 ================================================================= Acknowledge-To: