Various useful functions from the PPC ROM

Similar to other Solvers (e.g. the Advantage Pac DM41X Solve but with some minor differences to be aware of.

• Put the name of the program containing the expression to be solved in register 6
  • ALPHAAAALPHA
  • ASTO 06
• The program with the expression to be solved must be written as though x is on the x-stack only
  • other solvers “fill the stack” with X
  • here you need to manipulate the stack - easiest is to just ENTER ENTER ENTER and then treat the same as other solvers, and use x<>y to pull a fresh copy of X as needed
• Put a “step size” in y and a “start value” in x
• run SV

2x^2 + 3x -4 = 0

Prog “AA”

LBL AA
ENTER
ENTER
ENTER
x^2
2
*
x<>y
3
*
+
4
-
RTN

• 0 ENTER 1
• XEQALPHA SV ALPHA

and the answer comes…..

0.850781059

• for the other root
• 0 ENTER -3
• XEQALPHA SV ALPHA

and the answer comes…..

-2.50781060

— John Pumford-Green 24/01/26 10:29 GMT