[A83] Re: 83p os


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[A83] Re: 83p os



> Van: Patai Gergely <patai_gergely@fastmail.fm>
> 
> > The reason that the calculation takes a long time is because even
running 
> > flat out, the Z80 can't do FP math very fast.  Having user interaction
at 
> > the same time would slow it even more.
>
> I think you wanted to say TIOS instead of Z80. One improvement could be
> using binary arithmetic instead of decimal. We don't need decimal digits
> in the internal calculations. Also, there should be an option for purely
> integer math (say with 64-bit integers, that would allow for 19
> decimals), which could be done even faster then. Often there's no need
> for FP numbers.

Yes, for example the Z88DK uses it's own (very small btw) FP routines. They
are blazingly fast opposede to TIs own. Your Ti83 calculates in decimals,
because conversion between binary an decimal FP sometimes gives round
errors.

	Henk Poley <><



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