I bought a "Quad Module" — 82170A — from eBay, for my newly-purchased 41C.
It turns out — in a “fairy tale” plot twist — I’d actually bought a W&W “CCD Advanced” module.
With the module inserted, the CAT 2 (or, “CAT ’ 2” with the telltale caret) function displays the following:
W&W CCD A
ARR FNS
HEX FNS
I/O FNS
ADV FNS
X F/M FNS
I was able to figure this out based entirely on help from this discussion board — in particular, kind responses from mike-stgt, rprosperi, and Garth, on this previous topic from last week, “Quad Memory module changes ‘CAT’ function:
viewtopic.php?f=2&t=477
That discussion made clear how the newer, third-party modules were built into re-used shells, which is why my module has its “Clark Kent” 82170A “Quad Module” labeling.
Here’s my question:
Downloading the “HP-41 Archive” website contents, I found and browsed the manual for the original CCD module — which is very lucid and informative. However the “manual” for the CCD A is just a list of functions, some details flowcharts and some other arcane material (including software in barcode format). The table of “CCD Advanced Pac” functions doesn’t match the module “section headers” I list above.
Can anyone point me in the right direction, for more information and documentation of this module? (I have some rudimentary newbie questions, such as: in addition to the complex new functionality the module provides, does it also provide new memory registers, as it seems to? I can address register 64 and upward with the module installed — rather than getting “NONEXISTENT” as I do without the module — but I understand that I could be reading, not user-addressable memory (although I gingerly tried to store numbers into some of those higher registers and it worked without complaint).
Thanks in advance for any time and advice anyone here can provide — and, thanks to the people who helped me get this far in my investigation. As I said, I’m a newcomer to this amazing technology, and I’m actually more impressed with the aftermarket ingenuity than I am with Hewlett-Packard’s amazing, original 1979 innovations.
Thanks,
Jordan