[cctalk] CDC and IBM Schoonschip

Hi, As some of you may recall, a few years ago I asked for assistance reading a 9 track tape containing IBM S/360 source for Martinus Veltman's computer algebra program, Schoonschip (https://en.wikipedia.org/wiki/Schoonschip). With Chuck's assistance, we recovered all the code from the tape. After working with the principals involved, I am pleased to announce that the source code is now publicly available at: https://vsys.physics.lsa.umich.edu/ Actually, I was always more interested in the original CDC 6600 source code, as that is the more historically significant code. While that was not contained on the 9 track tape, I did receive a copy from the Veltman family, and that is also available from the above website. I have limited experience with big iron, but I had very good success getting Schoonschip compiled and running on dtCyber. Veltman also provided example Schoonschip programs (YNGLING), and as far as I can tell they run perfectly in CDC Schoonschip on dtCyber. However, I have not been fully successful in getting IBM Schoonschip to run on hercules under OS/360 MVT. The main issue I had was that the Fortran part of Schoonschip uses REAL*16, which apparently requires the H extended Fortran compiler that does not seem to be freely available. I did patch the Fortran code to avoid extended precision and managed to get Schoonschip running, but it would sometimes crash on some input files. I do not know if that is a problem with my patches or an actual bug in the original code (as the IBM version of Schoonschip was still a work in progress at the time development stopped). In any case, anyone who is interested is welcome to have their own go at the code. The third evolution of Schoonschip (m68k code, which was written after Veltman came to the University of Michigan) is also available at the same website. - jim -- James T. Liu, Professor of Physics 3409 Randall Laboratory, 450 Church Street, Ann Arbor, MI 48109-1040 Tel: 734 763-4314 Fax: 734 763-2213 Email: jimliu(a)umich.edu