Hello Rob,

That was quite an useful information for me - I have never used FP with 8051. Like for instance if I need to display the result of 25/8 upto two decimal places, I just do integer calculations :

* 25 x 100 = 2500
* 2500 / 8 = 312
* Display it as 3.12

I am aware of the limitations in such a scheme but till date have been able to manage without problems.

You said,

"The 32-bit IEEE-754 FP representation (the 'standard' for most 8051 C compilers) has a 23-bit fraction, an 8-bit exponent an a sign bit. This gives a range of ±1.2e-38 to ±3.4e+38."

With the bit allocation as above can you just elaborate as to how the given range was arrived at ? Would also request links to any good documentation as applied to FP with 8bit MCUs?

Thanks for the help.

Raghu