(11C) CUBIC EQUATION

[Dieter]

(06-11-2018 02:16 AM)Gamo Wrote:  Thank You for reviewing this program I noticed that this routine take a long time to run and must be something wrong in the original coding.
...
USER INSTRUCTIONS:
1. Initialize f [REG]

There we are:
This initializes R4 (and all other registers) with zero.
So the suggested CLX STO 4 in my previous post seems to be a good idea.

(06-11-2018 02:16 AM)Gamo Wrote:  2. 10^4 [STO] 0

10^4 ?
Your program stores 10^–4 instead. Which seems to make more sense.

(06-11-2018 02:16 AM)Gamo Wrote:  Program: CUBIC EQUATION

Code:

...
LBL 8
RCL 7
RCL 6
x
RCL 4
X=Y
GTO 7
...

Here your program differs from the listing:

Code:

RCL 7
RCL 6
x
RCL 4   // these three lines
+       // are not in the
STO 5   // 29C listing
RCL 4
X=Y
GTO 3

(06-11-2018 02:16 AM)Gamo Wrote:  Under user instruction the first step said Initialize f [REG] is this to make sure that each RUN register R4 is clear and that start R4 with zero ?

Yes, exactly.
That's why you should add a STO 4 after the CLX in the LBL A part.
I did so and it seems to work.

So the issue now seems to be resolved.

Dieter