42S "reserved" flags

[Thomas Okken]

(01-15-2018 04:24 PM)Dave Britten Wrote:  According to the 42S manual, there are a number of "reserved" flags, with no actual description given. Does anybody know what, if anything, these flags do or indicate? I haven't been able to find any info after a bit of Google searching.

14
17-18
31-33
54
64
67
78-80

Some of those gaps are flags that mean something on the HP-41 but not on the 42S, like flag 14, which is the write-protect override for the card reader. But of course that only applies to flags 0-55; flags 56 and up don't exist on the HP-41.

Here's a partial list from an earlier thread: http://www.hpmuseum.org/forum/post-75057.html#pid75057