> On Dec 9, 2016, at 2:56 PM, william degnan <billdeg...@gmail.com> wrote: > > On Fri, Dec 9, 2016 at 1:40 PM, Paul Koning <paulkon...@comcast.net> wrote: > >> >>> On Dec 9, 2016, at 1:22 PM, william degnan <billdeg...@gmail.com> wrote: >>> >>> IBM System/360 Model 44 Pamphlet from Nov 1968 >>> >>> http://www.vintagecomputer.net/browse_thread.cfm?id=659 >> >> Nice. The caption is odd; it claims that "... instruction set was >> compatible with the /30 through /91 models" when the pamphlet itself makes >> it quite clear that this is not so (no SS instructions). >> >> It's curious that the emulation feature, which adds software emulation of >> those instructions, isn't mentioned, and in fact I haven't seen it >> mentioned anywhere. >> >> paul >> >> >> > Paul, > You're right, the brochure says only through the /75, my error. I fixed > the page. > > I should have written programs written for the Model 44 will be compatible > with the System/360 Model 30 through 91, provided the configurations are > comparable and the programs and not time dependent.
That's true, but the wording implies that the converse holds (360/75 programs will run on 360/44) which is usually not true. "Compatible subset of the ... models" would be clearer. paul