> On Dec 15, 2015, at 10:10 PM, Chuck Guzis <[email protected]> wrote:
>
> On 12/15/2015 01:48 PM, Dave Wade wrote:
>> What I meant was are they still on 9-track, or some kind of
>> tape-in-a-file disk? IBM tapes are usually written to AWS format
>> files not the formats (.TAP ?) used by SIMH... Some source to extract
>> some versions of these from AWS files (and windows executables) are
>> in this ZIP file:-
>
> Came right off a 1600 cpi tape, identified as a CMS dumpfile.
>
> What really strikes me as odd, is that ANSI/IBM tape labels were pretty much
> the standard rule of thumb then; why the heck did IBM invent something new
> and obscure?
IBM standard labels are older than ANSI. Then again, IBM (in OS/360 at least)
had something they called "ANSI label" that were not actually ANSI at all.
They used "8 bit ASCII" which was a bizarre code created from standard 7 bit
ASCII by moving one or two of the bits (bit 6 to bit 7? I don't remember).
paul
