> On Feb 9, 2017, at 5:39 PM, Paul Koning <paulkon...@comcast.net> wrote: > > Gents, > > I'm looking at a set of RSTS V7 magtape images (a release kit) which have an > odd format that gives SIMH fits. > > In the container formats I'm used to, each tape block image is preceded and > followed by the data length as a 4-byte value. In SIMH that's rounded up to > even, in E11 format it's not, but apart from that this is how things work. > > The V7 tape images don't match that format. It looks like each block > contains not just the data but also 2 more bytes, and the data length value > represents that extra 2 bytes. So the tape label is 16 bytes, not 14, and > the data blocks are 514 bytes, not 512. > > Does this ring any bells? Where do those extra bytes come from? Can SIMH be > told to deal with this or does it require a repair program to fix the format? > > paul >
What is the file extension? TPC or TAP? I forget which SIMH uses, but there used to be a converter available to go from the format that many of the tape images are in, to the one SIMH uses. Zane
