[Coco] CoCo gcc project

[jdaggett at gate.net]

There is a file on RSTI that is the core of the proposed MC6839 Floating point math 
rom that Motorola either did or did not bring to market. It does fill a 8K block and 
supports the then proposed IEEE FP Standards v8. It does not have trig functions.

By the way the IDIV and FDIV instructions onteh HC11 take 41 machine cycles 
each. 

james
 

On 31 Oct 2003 at 19:17, Neil Morrison wrote:

> 
> ----- Original Message ----- 
> From: <KnudsenMJ at aol.com>
> 
> 
> > In a message dated 10/31/03 3:16:59 PM Eastern Standard Time,
> > jdaggett at gate.net writes:
> >
> > > I wished the 6809 had a DIV instruction!!!! Some base code to
> implement
> > what the
> > >  HC11 FDIV and IDIV instructions would be nice. Then you have 16
> bit by 16
> > > bit divide.
> >
> > To merge with another thread, the Star Wars arcade game used a 6809
> and had
> > an outboard hardware divide board, built of 7400-series TTL ICs.
> Don't recall
> > how many clocks it took.
> 
> ISTR that you could buy a math library in a rom chip for some of
> these, 6800 or 6809 IIRC. But I know of no FPU for them.
> 
> Neil
> 
> 
> 
> 
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