Apple-2-SW/apple2_print_fixed16_fraction
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Michaelangel007 2017-06-11 07:56:33 -07:00
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# Print Fixed Point #.16 Fraction # Print 16-bit Fixed Point Fraction
# Theory # Theory
@ -6,14 +6,15 @@ Printing the fractional value of a 16-bit fixed point number in decimal is rathe
For example, the number `0.7106` in 16-bit fixed point is 0.71506 * 65536 = 46,569 = `$B5E9` For example, the number `0.7106` in 16-bit fixed point is 0.71506 * 65536 = 46,569 = `$B5E9`
How do we convert the number `$B5E9` back into `.7106` ? By _digit peeling._ * Q. How do we convert the number `$B5E9` back into `.7106` ?
* Q. By _digit peeling._
Given a fractional number `N` represented as 16-bit integer then: Given a fractional number `N` represented as a 16-bit integer then the pseudo-code is:
1. Multiply N by 10 1. Multiply N by 10
2. Print the Integer Part digit 2. Print the Integer Part of `N` (a digit)
3. Set the Integer Part to zero 3. Set the Integer Part to zero
5. Have we printed the number of decimal digits we want? If no then goto step 1 5. Have we printed the total number of decimal digits we want? If no then goto step 1
Example: Example: