HP-92 Simulation Attempt

[teenix]

I'm not sure if I can complete this one.

I cannot get the formulas for Bond type 1 and 2 to work at all as presented in the applications manual.

I also tried to calculate the examples from HP80 manual using the formula at the back of the manual but that wont give the correct answer also.

I ran the same problem through the HP80 and got a trace which consisted of over 5000 code lines. I dissected all the procedures in this code and got a PC to run the same algorithm and the results matched. However, the code as dissected does not match what is published in the formula section.

An example is the last of the formula which states -(100 x Interest * J / 2)

The HP80 execution code for this part appears to be -(Yield * J / 2)

If the HP92 Bond Type 1 and 2 formulas are not as the code executes then there may not be a easy solution for this calculator.

cheers

Tony