And it will never be known what OCO cost IBM, customers, and the industry in terms of customer contributions/fixes/innovations it prevented. In VM-land, where source was once complete, its progression was like a light on a dimmer switch slowly fading out. But that's an old, settled, war. Maybe someone will earn a PhD documenting it.
On Mon, 21 Nov 2022 17:25:00 -0800, Michael Stein <m...@zlvfc.com> wrote: >On Mon, Nov 21, 2022 at 06:06:43PM -0600, g...@gabegold.com wrote: >> Fiche was fun. > >yes, definitely. > >I remember using fiche two versions back (save that old fiche) to help >make a fix in VTIOC (TSO/VTAM) hung users which couldn't be canceled. > >And telling OPEN/CLOSE/EOV the line number containing the change they >had made which broke my program (they said it explained a lot of other >things they had seen). > >Also a small one bit change to 3830 microcode to prevent channel >disconnect (the 3830 was connected to a 360/91 selector channel). >Along with this was a 360 program run at IPL time which sent the 3830 >a microcode program to zap the bit. > >I always wonder how gradual OCO really was since there was a lot >of old fiche around. But, I'd guess, gradually the fixes from the >field slowed down to a trickle. > >---------------------------------------------------------------------- >For IBM-MAIN subscribe / signoff / archive access instructions, >send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
