Path: utzoo!utgpu!water!watmath!clyde!cbosgd!ucbvax!amdahl.UUCP!littauer From: littauer@amdahl.UUCP (Tom Littauer) Newsgroups: comp.protocols.ibm Subject: Re: A Net protocol reversal Message-ID: <8801170857.AA03810@jade.berkeley.edu> Date: 17 Jan 88 05:58:23 GMT Sender: usenet@ucbvax.BERKELEY.EDU Reply-To: Tom Littauer Organization: The ARPA Internet Lines: 38 In article <8801162207.AA26467@jade.berkeley.edu> "Sarek: the logical one........" writes: >Apparently what they do is run software at each workstation that makes it >look like a 3270 to the box. The box has an Ethernet side towards the work >stations and looks like a 3274 to the IBM. It is QUITE capable of allowing >users to logon to a VAX, TSO on their IBM, and run graphics at a Textronics >station all at the same time. This isn't what the previous poster was talking about. This case is fairly easy to do. I'd be *REAL* interested to see a 3270 looking like a glass tty. It's easy enough to do for line-at-a-time operation, but when you're looking for each character individually (like in vi) the poll delay, host interrupt rate, and bandwidth restrictions will kill you quick. Not to mention being forced to hit one of the "transmit" keys in addition to the keystroke you wanted (like "enter" or "PA1" or ...). If you folks find something that comes close, *PLEASE* let me know. We've struggled long and hard to make our Unix (tm AT&T) accessible to users with 3270 terminals. We've succeeded in most areas, but editors (for example) we've had to provide parallel solutions for. Interesting side note: "rn" (the news reading tool) is written for glass tty but runs OK on 3270 in our system - just to show that there are SOME applications that expect individual characters that work on 3270. Let me know if I can clarify this any more. Tom -- UUCP: littauer@amdahl.amdahl.com or: {sun,decwrl,hplabs,pyramid,ihnp4,ames,uunet,cbosgd}!amdahl!littauer DDD: (408) 737-5056 USPS: Amdahl Corp. M/S 330, 1250 E. Arques Av, Sunnyvale, CA 94086 I'll tell you when I'm giving you the party line. The rest of the time it's my very own ravings (accept no substitutes).