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larsbrinkhoff / pdp10-its-disassembler

Disassembler and other tools for files in ITS formats
GNU General Public License v2.0
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Read saveset name from the right place #168

Open bictorv opened 3 months ago

bictorv commented 3 months ago

Support DUMPER format 6, which has saveset name at different offset. Also check dumper tape format and reject too old or invalid format codes.

This lets this program display the right saveset name for more tapes e.g. in http://www.bitsavers.org/bits/DEC/pdp10/magtape/dec_distribs/TOPS-20/.

bictorv commented 3 months ago

Format 0 has a different header, as far as I can tell. See TOPS-20 v4 DUMPER for some ways of handling it (there it is called TENEX/BBN format). Here, you should probably do the same check as at SETHDR there, to see if it is ASCII directly in the format field (rather than a format code). But I guess there are more differences - does dumper.c handle TENEX dumper files as it is now?

Can you point at some tape file in that format?

larsbrinkhoff commented 3 months ago

My main purpose for writing this dumper.c was to create TENEX mini-dumper files. I don't have any tape samples from a real TENEX system. I have been testing the output from my program against MINI-DUMPER running on TENEX, and it seemed to work. You could of course create some tape files with dumper.c but I can't guarantee they are 100% correct.