From: dxforth@gmail.com   
      
   On 7/07/2025 9:21 pm, Hans Bezemer wrote:   
   > On 07-07-2025 05:48, dxf wrote:   
   >> ...   
   >> He appears to dislike the idea of standard-imposed minimums (e.g. Carter's   
   >> suggestion of 16) but suggested:   
   >>   
   >>    a) the user can offload to memory if necessary from   
   >>    fpu hardware;   
   >>   
   >>    b) an ANS FLOATING and FLOATING EXT wordset includes   
   >>    the necessary hooks to extend the fp stack.   
   >   
   > In 4tH, there are two (highlevel) FP-systems - with 6 predetermined   
   configurations. Configs number 0-2 don't have an FP stack, they use the   
   datastack. 3-5 have a separate FP stack - and double the precision. The   
   standard FP stacksize is 16, you can    
   extend it by defining a constant before including the FP libs.   
      
   Given the ANS minimum of 6 and recognizing that merely displaying an fp number   
   can   
   consume several positions I added another 5 as headroom.  I organized it such   
   that   
   if the interpreter or ?STACK was invoked, anything more than 6 would report the   
   overflow:   
      
     DX-Forth 4.60  2025-06-25   
      
     Software floating-point (separate stack)   
      
     1e 2e 3e 4e 5e 6e .s  1. 2. 3. 4. 5. 6.000001