IBM CMS dumpfile idiocy
Chuck Guzis
cclist at sydex.com
Wed Dec 16 12:08:16 CST 2015
On 12/16/2015 07:57 AM, Paul Koning wrote:
> 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).
Then there's 6 bit ASCII/USASCII. I was trying to avoid using jargon
that some would not understand. I'm quite familiar with IBM EBCDIC "SL"
tape labels.
My point was that the CMS dumpfile tape isn't even a standard labeled
tape. It just starts out with the first block of data and ends with a
double filemark. No standard labels anywhere. Any non-CMS system would
not know what the heck the thing was.
--Chuck
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