The hospital I used to work for was an early adopter of TCPIP for the mainframe (early-to-mid 1990s), mainly because we needed to communicate with departmental minicomputer systems. Our first version used an Intel-built interface box, and the software came from them (but was probably written elsewhere).
A year or so later, IBM released the 3172, and we retired the Intel box, but got our TCPIP software from a company called Interlink. We were told flat out that the IBM version available at the time was a pig, and only supported by a single guy in Germany. It was our IBM SE who advised against using it. At that time there was no USS/OE in MVS, we were running it on ESA V4. They were still using the Interlink product when I left in 1997. The dependency of the IBM version on USS/OE came in (I believe) in OS/390 or early zOS. > -----Original Message----- > From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] > Behalf Of Ted MacNEIL > Sent: Monday, March 27, 2006 7:00 PM > To: [email protected] > Subject: Re: [IBM-MAIN] Barbaras (mini-)rant > > > >Now, why is the TCP/IP stack UNIX based? Can't > answer that one! > > I heard a story, many aeons ago, that the original TCP/IP for > ESA/OS390 was a direct port from VM, written in PASCAL. And, > it was a PIG! > It took a lot of progammers to support it, 7-24. > > One weekend, two of them took the original RFC (?term), and > re-wrote it from scratch. > The specs included UNIX functions and services to do things, > so they used USS to do everything they could, so they didn't > have re-invent the wheel. > The only thing they didn't do was the stack, since VTAM > already had one, and it was pretty good. > > This made it to OS/390 V2.5, I believe. > And, they dropped to two support people. > They also made improvements in. 2.7, IIRC. > > And, the performance improved drastically. > > We had 1000's of users on it, where I was before, and it > didn't use very much (along with VTAM). > > I have no independent proof of the above, but I trust my source. > > > - > -teD > -------------------------------------------------------- If you are not an intended recipient of this e-mail, please notify the sender, delete it and do not read, act upon, print, disclose, copy, retain or redistribute it. Click here for important additional terms relating to this e-mail. http://www.ml.com/email_terms/ -------------------------------------------------------- ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
