Re: Z80 Softcard speed?

["Alex Freed" <alexf@mirrow.com>]

"mdj" <mdj.mdj@gmail.com> wrote in message 
1170561217.421374.226310@p10g2000cwp.googlegroups.com">news:1170561217.421374.226310@p10g2000cwp.googlegroups.com...
>
> You *do* realise this is csa2 don't you ;-)
>
I do indeed. The last thing I wanted was a flame war. I still reserve the 
right
to speak my mind :)

> More seriously, if best is units shipped you're probably right.
> Personally I would bestow 'best' on the 6809. Nice orthogonal
> instruction set, efficient execution speed. The only problem is
> whether a CPU with 16 bit index and stack registers and paired 8 bit
> accumulators qualifies as 8 bit, but I think it does ;-)

I never used 6809 so I don't have an opinion.
As a hardware guy I did use Z80 and loved it.

Apart from the success in the marketplace z80 has:

1. Advanced hardware for the time (single 5 volts power, fully static 
registers)
2. 16 bit operations on register pairs
3. dual set of registers - great for interrupt handling
4. transparent memory refreshing.
5. Architecture that is far from perfect but quite usable.

And on and on.

Anyway I only expressed my *opinion*.

-Alex.