Re: Z80 Softcard speed?

["mdj" <mdj.mdj@gmail.com>]

On Feb 4, 8:52 pm, "Alex Freed" <a...@mirrow.com> wrote:

> 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.

6809 can be thought of as halfway between a 6502 and Z80 - it has the
6502 style fast hardwired ALU, plus all the things that made Z80
great. Since it came to the 8bit marketplace quite late it never got
the penetration the others did, but it was a lovely CPU, and combined
with OS/9 was probably the finest 8-bit platform.

> Anyway I only expressed my *opinion*.

Same. Sorry Alex, my remark was intended to be taken in jest, and to
point out that many (most?) here would probably argue the 6502 was
superior to the Z80 :-)

I'd certainly agree though that the Z80 makes the best embedded
processor, since it's so easy to integrate, and the fact that it's
still used in that capacity so widely supports that opinion.

Matt