22 Dec
2001
22 Dec
'01
6:20 a.m.
Often it's the semantics rather than the technical substance that cause the
problems.
Dick
----- Original Message -----
From: "Sipke de Wal" <sipke(a)wxs.nl>
To: <classiccmp(a)classiccmp.org>
Sent: Saturday, December 22, 2001 2:34 AM
Subject: Re: 6502/Z80 speed comparison (was MITS 2SIO serial chip?)
All this fighting over valid
"computer"definitions .....
Alan Turing would turn in his grave !
Almost merry XMAS everybody so "Peace"
Sipke de Wal
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http://xgistor.ath.cx
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----- Original Message -----
From: ajp166 <ajp166(a)bellatlantic.net>
To: <classiccmp(a)classiccmp.org>
Sent: Saturday, December 22, 2001 3:27 AM
Subject: Re: 6502/Z80 speed comparison (was MITS 2SIO serial chip?)
When you get over it...
Talking about 20mhz 65C02s and other "fast" parts that didn't exist when
even the z180 (orginally 64180) was introduced is equally bogus.
A Pentuim anything running a Z80 emulator is still emulation and not
native silicon.
Now cut the crap.
Allison
-----Original Message-----
From: Richard Erlacher <edick(a)idcomm.com>
To: classiccmp(a)classiccmp.org <classiccmp(a)classiccmp.org>
Date: Friday, December 21, 2001 7:06 PM
Subject: Re: 6502/Z80 speed comparison (was MITS 2SIO serial chip?)
We went through all this a couple of years back
under the same heading.
If the
Z235980 at 234 THz is code compatible then, if I
understand you
correctly, it IS
a Z80, right? Even though the Z180 won't fit
in a Z80 socket, you'd
sell it as
a Z80 anyway, right? Even though it didn't
even exist back when it
mattered,
you still insist it's a Z80, right?
My Pentium executes the Z80 code just fine at about 75x the speed of of
a Z80.
Does that mean it's a Z-80?
We're comparing CHIPS, not philosophical constructs. If it IS a Z80, or
Mostek
3480, or something else EXACTLY a Z80, i.e. built
under the license,
pin-compatible, code-compatible, etc. then MAYBE it's germane to this
discussion. No chip that isn't a pin-compatible substitute commonly
referred
to
as a Z80 back in the days when the Z80 mattered is
germane to this
topic. If it
won't plug into the socket of a Z80, FORGET
IT, because it's not a Z80.
If
that's too difficult for you, then please ask
an adult why a 47-ohm
resistor
isn't the same thing as a 75-ohm resistor.
I'm sure glad you're not trying to sell parts any more, Allison. I'd
hate to
have to argue with you that the choke you're
trying to pitch isn't a
diode.
Dick
----- Original Message -----
From: "ajp166" <ajp166(a)bellatlantic.net>
To: <classiccmp(a)classiccmp.org>
Sent: Friday, December 21, 2001 4:24 PM
Subject: Re: 6502/Z80 speed comparison (was MITS 2SIO serial chip?)
> From: Richard Erlacher <edick(a)idcomm.com>
>
>
> >There are lots of things that you could compare, but the first things
> you've got
> >to leave out are the ones that aren't a Z80, which immediately
deletes
> the Z180,
> >and Z280. The Z80 is not around any more than the 6502 is around.
> There are
>
>
> Why? they are still z80 core and code compatable. While they add
things
like
serial IO, timers and MMU they are Z80, maybe more so than 65C02.
Allison