That's complicated. To begin with, even in the OS/360 days IBM did not provide source code for OS or DOS service that they distributed as object code, although they did provide microfiche of the assembly listings. CP-67 and later VM/370, of course, got service as source updates, as did HASP and ASP. Does anybody know whether TSS service included source. Theoretically you could update the optional source to include service changes in the microfiche, but that really wasn't practical, and AKAIK most installations relied on zaps. But the fiche was still a good way to fill gaps in the documentation.
The launch of OCO (ptui!) was piecemeal; over time IBM dropped more and more code from the optional source and microfiche, and did not provide them at all for new components. As I recall, some optional source and microfiche was still available in 1983. -- Shmuel (Seymour J.) Metz http://mason.gmu.edu/~smetz3 ________________________________________ From: IBM Mainframe Discussion List [[email protected]] on behalf of Tom Brennan [[email protected]] Sent: Tuesday, November 1, 2022 2:10 AM To: [email protected] Subject: Re: End of several eras I had worked on PC's and Computervision graphic machines prior to 1983, and everything there was already OCO I think, so I didn't know any better when IBM went OCO. I rarely looked at the fiche, but it was really interesting to see PL/X (I think it was called) compiled into assembler code. I do remember one time where (with someone else's help) we found the cause of an error by looking at the fiche and reported it to IBM - with our own fix of course :) FYI: https://secure-web.cisco.com/1L0J3UPOYaof-tqaybpTvvUJmgIjikHRp1YdQuIjDvcOdWCtuV4kB9spBv8TmmSzRSWXGiIxYTCOsLxTYX3Ojqfc7cQ_9pNA8lq4Gq5oTnpEZRd1JmggvZSoUBV41SVHYqMOpIKtPJHI8OTn7zWlLGLJhAgdaSJNnc62rAcZo5TueNHuX5xBj7m6ser7Nj9YzZhCkKGhVmBzGG3DQqjESkT42CHWwitzn-r4BDQbVxzqgiKj9ZIhumoTHihmnQ1RvsQMOugq3Lixc0367yuuxMBMbyn4KYsOAl_POK3XrdujiuvvMRqOp-uMqyYuMzJkzoQ4o9V1uZabqPhxmJhLAS1wH2P1BIK1RLv6SBHTJVtx7xKRP8QgxTm97EYpXCjlrY_zEGjSlbjCPinF4XtBgdq5vx9iGYlAGBqlMsakvjfRCJkJwSok4FQVRRnGV3w3q/https%3A%2F%2Fen.wikipedia.org%2Fwiki%2FComputervision On 10/31/2022 4:42 PM, David Spiegel wrote: > Hi Tom, > 1983, eh? > The same year as the (expletive deleted) OCO policy. > I've seen IBM-lifers defend it on this forum, yet, it still did not/does > not make sense. > > Regards, > David > > On 2022-10-31 19:31, Tom Brennan wrote: >> I get it... I just heard from an old co-worker that sometime this >> month they shut down the mainframe in Southern California that I >> worked on from 1983 to 2013. That was my first exposure to an IBM >> mainframe, and I think XA had just come out and people were busy >> fixing programs to work in AMODE 31. There was a rack full of MVS >> microfiche and a viewer at each desk. If we needed to send a dump to >> IBM we had to create a tape and carry it across the street to the mail >> room. >> >> On 10/31/2022 2:50 PM, Gibney, Dave wrote: >>> I just shutdown our z/OS 2.3 system(s) for the last time. >>> When I came to school in 1976, the computer was described as "loosely >>> coupled 370s". My exposure was via remote cardreader/printer. >>> When I started working here in 1981, there were still folks that had >>> rewired boards for what they had before that. >>> End of 2019, we moved from a 10 year old z9 to MFaaS with FNTS in Omaha. >>> >>> Dave Gibney >>> Information Technology Services >>> Washington State University >>> >>> >>> ---------------------------------------------------------------------- >>> For IBM-MAIN subscribe / signoff / archive access instructions, >>> send email to [email protected] with the message: INFO IBM-MAIN >>> >>> >> >> ---------------------------------------------------------------------- >> For IBM-MAIN subscribe / signoff / archive access instructions, >> send email to [email protected] with the message: INFO IBM-MAIN > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to [email protected] with the message: INFO IBM-MAIN > > ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
