I would like to have an 8 bit negative/positive floating point.

You want an 8-bit floating point value. Why?

A floating point value consists of 3 parts:

  1. 1-bit to indicate the sign.
  2. A number of the remaining bits denote the scale of the value. (The exponent, characteristic or scale.)

    This scales the size of the value, and 1-bit indicates whether it is either bigger or smaller.

  3. A number of bits that represent the actual value. (The significand, coefficient or the mantissa.)

    These bits define the precision of the values tha can be represented.

Assuming that you go for 4 bits of precision, that leaves 3 bits for scaling, means you could represent numbers between +/- 0.001 and +/- 150, which is a pretty useless format.

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In reply to Re^3: How to convert negative and positive floating points to binary and vice versa by BrowserUk
in thread How to convert negative and positive floating points to binary and vice versa by thanos1983

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