On Saturday, April 17, 2021 at 2:37:23 PM UTC+10, Dan Stromberg wrote: > > I want to produce EBCDIC executables that run on a > > S/3X0 (or z/Arch) machine (even if I personally do > > that via emulation). > > > I thought EBCDIC was analogous to ASCII?
EBCDIC is an alternative to ASCII. E.g. the character '0' is at position x'F0' in EBCDIC compared to x'30' in ASCII. Note that in EBCDIC, the letters 'A' to 'Z' are not contiguous either, and the C90 standard has been carefully worded and designed so that you can rely on digits being contiguous, but not letters. > Is it also analogous to a.out, ELF and COFF? MVS 3.8J doesn't use any of those formats. The executable format is just called "MVS load module". And the object format is just called "object code". I'm not aware of any special names for them. PDOS/3X0 currently only runs MVS load modules, but I have plans for a PDOS-generic which will run under PDOS/3X0, and will use FAT instead of the MVS file system (basically just a VTOC, equivalent of a root directory, no subdirectories). So the VTOC would have one important flat file which PDOS-generic will access to provide a FAT facility to any applications running under PDOS-generic. Those applications will need to be specific to PDOS-generic and they may well be a.out/ELF/COFF - I haven't reached that point yet. I'm still preparing the assembler, I can't do what I want without that. :-) BFN. Paul. -- https://mail.python.org/mailman/listinfo/python-list
