The advantage module contains functions that are not in the C, CV, or CX, so if something needs it, then you either need to fet one or you need to duplicate the functions yourself. For come it's not too hard, for others, nearly impossible.

The manual is 150 pages, which gives you some idea of how much documentation you need for it. In the acknowlegments it says:

"The matrix operations in this pac were based on the CCD ROM...

The root finding and numerical integration routines were adapted from the HP-15C..."

The table of contents list these areas that the Advantage pac covers...

Matrix Functions Finding the roots of an equation polynomial solutions and evaluations numerical integration differential equations Operations with complwx numbers vector operations number comversions and boolean logic curve fitting the time value of money

The manual notes that the same named functions exist in the math pac for complex numbers and differential equations, and in the real estate pac for N, PV, PMT, FV and +I

The manual also states that many of the programs are copyable, so you may be able to copy the ones you need (but that would be naughty...)

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Try to obtain an extended functions memory module from the classified ads at this site, or from ebay (and possibly many other places)

Note that there are two sorts of module, the extended functions module, and the X memory module. the former contains the rom that does the clever stuff, and some extended memory, the latter contains only extended memory. You need at least one of the former (unless you have a CX), and up to two of the latter.

NB the 41CX has the X functions built in, plus one or two more.

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The time module allows you to set alarms which activate programs at times you determine, turns your calculator into a rather clever little stopwatch, and a couple of things I can't remember. (I think it allows day of week calculations, and adding days to a date etc.)

NB The 41CX has the time module built in.

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You're welcome

Steve