HP Forum Archive 20

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What is the CCD Plus module? Message #1 Posted by gene wright on 11 Feb 2011, 3:08 p.m. I know about the CCD/OSX and the CCD module 1B image, but I have seen references to the CCD Plus rom for the HP 41. Anyone have any details of what's in it? What makes it a "plus" ?

Re: What is the CCD Plus module? Message #2 Posted by Raymond Del Tondo on 11 Feb 2011, 10:39 p.m., in response to message #1 by gene wright It's a modified CCD module from Angel. The "Plus" is somewhat irritating, as it's a CCD 8K image with matrix functions removed, or replaced by alpha register functions, IIRC. Maybe overlapping with the Alpha ROM? Angel could better comment on this.

Re: What is the CCD Plus module? Message #3 Posted by Ángel Martin on 13 Feb 2011, 3:35 p.m., in response to message #1 by gene wright The CCD module was a superb achievement, possibly the better of the custom modules of its time. Yet the Advantage ROM implemented a superior version of the Matrix functions (I think HP purchased them from W&W, which speaks of their quality!) - making the CCD Array FNS set somewhat superfluous. Which lead to the question: would it be possible to remove them from the CCD, replacing them (i.e. use the available space) with something else? That's a PLUS in my opinion. Of course everyone would choose a different set, back then I chose ALPHA and Buffer/KA. Just one of many. Cheers, 'AM

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