35s Polar to rectangular programming

[Craig Ormandy]

Hi All
I recently misplaced my 48g+ and have just got hold of a 35s so am very new to the programming scene.Apologies if the questions I am asking are rather mundane but being new to this I am still trying to get my head around it.
I am trying to programme the 35s with a surveying missing line programme that I have which utilises the polar to rectangular function. I have managed to find the steps on this but am unsure on a few of the symbols used to input it.The part I am looking at is the following extract:

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Re: Program format from 33s to 35s
Message #11 Posted by Paul Dale on 16 Sept 2007, 5:02 p.m., Report post,
in response to message #1 by romeo_charlie

For a long article on rectangular to polar conversions look at this discussion. By the end, the programs for doing the conversion were pretty good. I've submitted the "best" to the museum for inclusion in the software library. I've also included them here:

P001  LBL P

P002  FS? 10

P003  GTO P011

P004* Rv

P005  Rv

P006  eqn REGZ+i*REGT

P007  ARG

P008  LASTx

P009  ABS

P010  RTN

P011* CF 10

P012  XEQ P004

P013  SF 10

P014  RTN

R001  LBL R

R002  FS? 10

R003  GTO R012

R004* Rv

R005  Rv

R006  eqn [REGZ*SIN(REGT),REGZ*COS(REGT)]

R007  [1,0]

R008  x<>y

R009  *

R010  EQN LASTx*[0,1]

R011  RTN

R012* CF 10

R013  XEQ R004

R014  SF 10

R015  RTN

Both routines preserve the Z and T registers and return their results in the X and Y registers. The are also independent of the settings on the calculator and honour the current trig mode.

- Pauli

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and in particular the asterix symbol (*) in a number of the lines. Could someone maybe explain to me how this is inputed and what it means?
Is it a multiply symbol or something else and what does it mean after the likes of R012? Also how is it inputed in the equation part of R006 for example?
From reading through and my very basic knowledge it is steps missed out by the programme if other parts are carrying out by the prior lines? However I could be totally wrong...
Also is there a difference between EQN and eqn (lines R006 and R010)? And does the text after the eqn word need to be typed in as I am sure I read somewhere that it is not needed but am also sure it would be or how is the line executed?
After reading my message my questions do sound rather silly and probably very basic to the majority of you but if someone could help me out I would be most grateful.
Cheers
Craig

[Paul Dale]

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and in particular the asterix symbol (*) in a number of the lines. Could someone maybe explain to me how this is inputed and what it means?

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This means that that line is the target of a branch. You don't input it.

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Also how is it inputed in the equation part of R006 for example?

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In equations it is a multiplication sign. After the line number it is ignored.

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Also is there a difference between EQN and eqn (lines R006 and R010)?

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Nope, both are algebraic equations.

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And does the text after the eqn word need to be typed in as I am sure I read somewhere that it is not needed but am also sure it would be or how is the line executed?

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Yes it needs to be typed in. All apart from the "eqn " or "EQN ". These expressions evalulate and the result is pushed onto the RPN stack.

- Pauli

[Jeff O.]

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Yes it needs to be typed in. All apart from the "eqn " or "EQN ".

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Just to clarify (in case it is not obvious), it does not have to be typed in letter by letter. If you need LASTx in an equation, just press blue-shift ENTER, if you need the SIN function, just press SIN, etc. The REGT, REGZ etc. functions are entered by pressing the Roll-down key, selecting the stack register you want with the left-right cursor keys, then pressing ENTER.