README

Z80 floating point library for fast Iterated Function System generator on a TI-83/84 calculator.

Specs of floating point library:

• 16 bit two's complement mantissa
• 8 bit two's complement exponent
• functions for sum, difference, product
• functions for transition between this format and the TI BCD format

Specs of the IFS:

• Supports an arbitrary number of fixed points
• Each fixed point is characterized by:
  • a coordinate
  • a rotation angle
  • a compression factor

Notes on using the IFS Generator:

• Still only beta quality. A sierpinski triangle will work, but more elaborate systems (with rotations) might crash your calc
• Usage: use the TI-Basic wrapper IFSFPASM and make sure that Ans holds a matrix with on each row the x component, the y component, the rotation angle, the contraction factor of the fixed point. For the sierpinsky triangle, you enter: [[0,0,0,2],[0,1,0,2],[1,0,0,2]]:prgmIFSFPASM

For more information, contact me (see contact info below).

If you use or modify this code, please let me know so I can share in on the fun ;-). (Also contact me for the exact licence on this code. It will probably be under the GPL, but I haven't fully made up my mind yet.)

For the latest version of the code or documentation, see http://github.com/RoaldFre/z80fltptlib

Roald Frederickx <roald [dot] frederickx [at] gmail [dot] com>