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Vern Hamberg wrote:
I wondered about the various possible nybbles that can be there for
negative - did not remember or know of those for positive - are there
more? Various references on the 'Net suggest there are only C & F for
positive, D for negative. Adding another range is easy enough, it it'll
take care of the problem.
Not sure where that information was found, but the reference is
incorrect for the signed Packed & Zoned BCD [Binary Coded Decimal]
representations on both the i and z systems. All of the 0xA through
0xF are valid sign nibbles.
http://en.wikipedia.org/wiki/Binary-coded_decimal clarifies in a
table for the /Packed BCD/ but fails to include a similar table for
its description of the /Zoned decimal/ BCD. Both the 0xB and 0xD
indicate negative data. See the IF test in the modified UDF I gave
in my response to the original message:
http://archive.midrange.com/midrange-l/200910/msg00774.html
Regards, Chuck
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