Comments on: Any Significance to 65,536? http://www.automateexcel.com/2004/12/13/excel_any_significance_to_65_536/ Everything Excel. Only Excel. Mon, 21 Nov 2011 07:25:47 +0000 hourly 1 http://wordpress.org/?v=3.2.1 By: Mark http://www.automateexcel.com/2004/12/13/excel_any_significance_to_65_536/comment-page-1/#comment-249 Mark Mon, 13 Dec 2004 11:13:28 +0000 #comment-249 <a href="http://www.dicks-blog.com/archives/2004/07/23/bitwise-and/" rel="nofollow">The bitwise post from Daily dose</a><br /> <br /> Mat Matlock added this on David's blog:<br /> <br /> "The IV/256 goes back as far as Visicalc. I presume, since that is 2^8, that there is a memory allocation that fits here. 1-2-3, v 1A, had 2048 rows, again 2^11 (I think). Later versions of 1-2-3 expanded that number to 8192, then early versions of Excel went to 16384, still 2^??. I believe it was Excel '97 that finally expanded it to 65536. More of that silly 2^??, which probably relates to some amount of memory being allocated to the address." The bitwise post from Daily dose

Mat Matlock added this on David’s blog:

“The IV/256 goes back as far as Visicalc. I presume, since that is 2^8, that there is a memory allocation that fits here. 1-2-3, v 1A, had 2048 rows, again 2^11 (I think). Later versions of 1-2-3 expanded that number to 8192, then early versions of Excel went to 16384, still 2^??. I believe it was Excel ’97 that finally expanded it to 65536. More of that silly 2^??, which probably relates to some amount of memory being allocated to the address.”

]]> By: Mark Bigelow http://www.automateexcel.com/2004/12/13/excel_any_significance_to_65_536/comment-page-1/#comment-248 Mark Bigelow Mon, 13 Dec 2004 09:10:59 +0000 #comment-248 It's a pretty significant computing number and I don't understand most of it. However, it's the upper 16 bits of a 32 bit number and is the largest value that can be handled by an openvms device driver (both from googlism.com).<br /> <br /> <a href="http://www.dicks-blog.com" rel="nofollow">Dick's Blog</a> has an interesting article on bitwise And that may shed a little light on this.<br /> <br /> Mark It’s a pretty significant computing number and I don’t understand most of it. However, it’s the upper 16 bits of a 32 bit number and is the largest value that can be handled by an openvms device driver (both from googlism.com).

Dick’s Blog has an interesting article on bitwise And that may shed a little light on this.

Mark

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