PS if you're interested in software archaeology and you have the CCP4 library source code handy, check out these routines that I wrote for VAX/VMS. Yes, we kept it in the source distribution all these years!
ccp4-7.0-src/checkout/libccp4/fortran/vmsdiskio.for Subroutines QFIEEE & QTIEEE illustrate the horrible data mangling you had to do just to convert between Vax floating-point and IEEE (on top of the byte-swapping!). Those were the days! Cheers -- Ian On Fri, 9 Nov 2018 at 19:17, Ian Tickle <ianj...@gmail.com> wrote: > > All MTZ (and map) files from the very beginning had an > architecture-dependent 'machine-stamp' in the header which *should* cause > the read routines to do the necessary conversions if needed (i.e. where the > writing & reading machine formats differ). This was absolutely necessary > in the days when we had a goodly mix of formats (VAX, Convex, Cray, SGI, > IBM mainframe, IBM PC, Mac ...). Now pretty well everything is Intel or > compatible, i.e. little-endian IEEE format, so this functionality hasn't > been real-world tested for aeons and it's possible in the meantime that > it's fallen into disrepair. > > Cheers > > -- Ian > > > On Fri, 9 Nov 2018 at 18:57, Ethan A Merritt <merr...@u.washington.edu> > wrote: > >> On Friday, November 9, 2018 9:12:36 AM PST Robert Esnouf wrote: >> > >> > Without checking further, there is a "dd" option for swapping >> big-endian to little-endian... swab. This may simply be the issue... >> >> DEC computers used a different floating point format. >> Swapping endian-ness would be sufficient, although it might be required >> in addition. >> >> Ethan >> >> >> > >> > The output of od -x may help decode the header of the file... >> > >> > Regards, >> > Robert >> > >> > -- >> > >> > Dr Robert Esnouf >> > >> > University Research Lecturer, >> > Director of Research Computing BDI, >> > Head of Research Computing Core WHG, >> > NDM Research Computing Strategy Officer >> > >> > Main office: >> > Room 10/028, Wellcome Centre for Human Genetics, >> > Old Road Campus, Roosevelt Drive, Oxford OX3 7BN, UK >> > >> > Emails: >> > rob...@strubi.ox.ac.uk / rob...@well.ox.ac.uk / >> robert.esn...@bdi.ox.ac.uk >> > >> > Tel: (+44)-1865-287783 (WHG); (+44)-1865-743689 (BDI) >> > >> > >> > -----Original Message----- >> > From: "Pavel Afonine" <pafon...@gmail.com> >> > To: CCP4BB@JISCMAIL.AC.UK >> > Date: 09/11/18 13:54 >> > Subject: Re: [ccp4bb] VERY old mtz file.. >> > >> > Now I see the value of storing data in plain text files even more (mind >> Shelx or X-plor formats, for example) -;) >> > >> > >> > <Sorry for helpless comment. Couldn't resist as I've never liked >> non-human readable files.> >> > >> > On Fri, Nov 9, 2018 at 9:47 PM Clemens Vonrhein < >> vonrh...@globalphasing.com> wrote: >> > >> > Hi Eleanor, >> > >> > You could try running the oldest MTZ2VARIOUS binary you can find - >> > e.g. >> > >> > wget ftp://ftp.ccp4.ac.uk/ccp4/4.2/binaries/ccp4-4.2_Linux.tar.gz >> > tar -xvf ccp4-4.2_Linux.tar.gz bin/mtz2various >> > >> > bin/mtz2various hklin ... >> > >> > Any older binaries (ftp://ftp.ccp4.ac.uk/ccp4/4.0.1/) will require an >> > SGI or Dec/Alpha machine ;-) >> > >> > If that doesn't help I would first check that it is actually a correct >> > MTZ file: does the ASCII header (trailer) show up with >> > >> > strings your.mtz >> > >> > towards the end? >> > >> > Cheers >> > >> > Clemens >> > >> > On Fri, Nov 09, 2018 at 12:47:09PM +0000, Eleanor Dodson wrote: >> > > Anyone any idea what to do about this?? Created in 1992!! >> > > Seems unreadable.. >> > > >> > > No CTYP lines input for file: 1 >> > > Indices output even if all data items flagged "missing" >> > > Warning, NOT all LABOUT data lines given >> > > Warning: Machine stamp corrupted? Assuming native format. >> > > >>>>>> CCP4 library signal library_file:End of File (Error) >> > > >> > > >> ######################################################################## >> > > >> > > To unsubscribe from the CCP4BB list, click the following link: >> > > https://www.jiscmail.ac.uk/cgi-bin/webadmin?SUBED1=CCP4BB&A=1 >> > >> > -- >> > >> > *-------------------------------------------------------------- >> > * Clemens Vonrhein, Ph.D. vonrhein AT GlobalPhasing DOT com >> > * Global Phasing Ltd., Sheraton House, Castle Park >> > * Cambridge CB3 0AX, UK www.globalphasing.com >> > *-------------------------------------------------------------- >> > >> > ######################################################################## >> > >> > To unsubscribe from the CCP4BB list, click the following link: >> > https://www.jiscmail.ac.uk/cgi-bin/webadmin?SUBED1=CCP4BB&A=1 >> > >> > >> > >> > To unsubscribe from the CCP4BB list, click the following link: >> > https://www.jiscmail.ac.uk/cgi-bin/webadmin?SUBED1=CCP4BB&A=1 >> > >> > >> > >> > ######################################################################## >> > >> > To unsubscribe from the CCP4BB list, click the following link: >> > https://www.jiscmail.ac.uk/cgi-bin/webadmin?SUBED1=CCP4BB&A=1 >> >> >> -- >> Ethan A Merritt >> Biomolecular Structure Center, K-428 Health Sciences Bldg >> MS 357742, University of Washington, Seattle 98195-7742 >> >> ######################################################################## >> >> To unsubscribe from the CCP4BB list, click the following link: >> https://www.jiscmail.ac.uk/cgi-bin/webadmin?SUBED1=CCP4BB&A=1 >> > ######################################################################## To unsubscribe from the CCP4BB list, click the following link: https://www.jiscmail.ac.uk/cgi-bin/webadmin?SUBED1=CCP4BB&A=1
