## Monday, May 15, 2017

### HP 10C and HP 11C: Fibonacci Numbers (Tom Grydeland)

HP 10C and HP 11C: Fibonacci Numbers (Tom Grydeland)

Hi!  It’s good to be blogging again.  My presentation for HHC 2017 is almost ready and I will be reviewing and polishing it in June.

Today’s program is courtesy of Tom Grydeland.  This is his Fibonacci number program for the HP-10C and HP-11C.  In the 1980s, Hewlett Packard sold a family of landscape calculators, the most famous being the HP-15C and HP-12C.  The HP-10C and HP-11C were simpler versions of the HP-15C.

For the HP-15C version, check out this post:  http://edspi31415.blogspot.com/2017/03/hp-15c-fibonacci-numbers.html

I thank you Tom for letting me post this on my blog.

Here is what Tom wrote to me:

Dear sir,

In response to your blog post on Fibonacci numbers for the HP-15C:

For the HP-11C, the DSE instruction (and ISG also) references register
I only.  Therefore, to run Joe Horn's program on the 11C, replace step
002 (STO 0) with '44, 25' (STO I), and step 010 (DSE 0) with '42, 5'
(DSE).

For the HP-10C, there are no ISG or DSE instructions, nor labels. The
program becomes (tested)

Step    Key Code        Mnemonic
001     1               (1)
002     34              (X<>Y)
003     0               (0)
004     34              (X<>Y)
005     1               (0)
006     30              (-)
007     44 0            (STO 0)
008     33              (Rv)
009     40              (+)
010     42 36           (LST X)
011     34              (X<>Y)
012     45 0            (RCL 0)
013     42 20           (X=0?)
014     22 16           (GTO 16)
015     22 05           (GTO 05)
016     33              (Rv)
017     22 00           (GTO 00 == STOP)

thank you and best regards.

Eddie

This blog is property of Edward Shore, 2017.

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