I can't decide whether this thread is fascinating or stultifying. I guess that means it's fascinating!
On Thu, Feb 23, 2017 at 1:03 PM, Andy Wood <woo...@ozemail.com.au> wrote: > >My €0.02: > >There are (were) both: hardware and OS software. > > > >Software: IBM OS/390, Fujitsu MSP, Hitachi VOS and AFAIK Siemens (don't > >remeber the name) > >The clones were very similar, but not the same. > > > >Hardware: you could run IBM OS/390 on Hitachi or Amdahl machine, it was > >both feasible, and legal (allowed by IBM). > >(in the older days the number of HW clones was higher: ITEL, Olivetti, > >Comparex, etc.) > > > >-- > >Radoslaw Skorupka > >Lodz, Poland > > ... > > I believe Siemens at one time sold a system derived from the RCA Spectra. > > I encountered the RCA Spectra in the guise of an ICL (English Electric) > System 4. I wrote assembly code for that which from my point of view was > identical to S/360 assembly. > > The operating system, about which I knew very little (and now recall even > less), must have been quite different because the machines had several > interrupt states each with its own set of GP registers. No chance of > running an IBM operating system on one of those. > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN > -- zMan -- "I've got a mainframe and I'm not afraid to use it" ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
