> -----Original Message----- > From: Dennis Boone via cctalk <[email protected]> > Sent: Thursday, September 21, 2023 4:33 AM > To: General Discussion: On-Topic and Off-Topic Posts <[email protected]> > Cc: Dennis Boone <[email protected]> > Subject: [cctalk] Re: IBM VM "CMS" tape format > > > Ive got a tape here from what I believe to be a VM system. The > structure is > unknown to me, although I can possibly take a stab at > it. Lots of data > between tapemarks that seems to consist of a number > of records that start > out something like this (translated from > EBCIDC): > > I think this might be the older VMFPLC (not VMFPLC2) format, used by IBM for > software distribution and other things. The format seems fairly > simple: Five character block header (x'02' 'CMS' 'N' or '0'), 800 bytes of contents. > First block is the FST for the file.
Never seen a VMFPLC format tape, only VMFPLC2 or CMS TAPE command format. The main difference between CMSTAPE and VMFPLC2 is one has the FST at the start, the other at the end. I tweaked some utils from old to read and write these in AW format... https://1drv.ms/f/s!Ag4BJfE5B3onhK8KXjiJ7iUXUgRs8A?e=qS99zs which may help.. > > https://www.garlic.com/~lynn/2003b.html#42 > > Old VMFPLC may be just CMS TAPE DUMP under the covers. > > De Dave
