LIN-BAIRSTOW ALGORITHM for HP67/97 UPDATE!

[Thomas Klemm]

Let me add a few notes:

• The program is based on the similar program for the HP-11C.
• As I'm not that familiar with the HP-67, there may be room for improvements.
• With \(10\) secondary registers, polynomials up to degree \(n = 9\) can be solved.
• However, this can easily be extended to \(n = 14\) by using registers A-E.
• As registers 8 and 9 are not used, we could start with register 8 instead of register 10.
• This means the maximum degree is \(n = 16\).
• For this to work, some minor code changes are required.
• However, entering the coefficients becomes cumbersome, so I don't think it's generally worth it.
• The listing can be used with this online HP-67 emulator.
• The program is slow, so you have plenty of time watching the blinkenlicht.
  

Here is the data for the emulator from the example above:

Code:

DATA
26
00: 15
01: 1
02: 1
03: 0
04: 0
05: 0
06: 0
07: 0
08: 0
09: 0
10: 2
11: -9
12: 15
13: 65
14: -267
15: 234
16: 0
17: 0
18: 0
19: 0
20: 0
21: 0
22: 0
23: 0
24: 0
25: 0