That's a valid assumption for TTL but not for NMOS
PMOS! And CMOS actually needs roughly the double
amount of transistors
I've never heard of mos-multi-emitter-transistors
Sipke de Wal
------------------------------------------------------
http://xgistor.ath.cx
------------------------------------------------------
----- Original Message -----
From: Richard Erlacher <edick_at_idcomm.com>
To: <classiccmp_at_classiccmp.org>
Sent: Sunday, May 06, 2001 6:48 PM
Subject: Re: How many transistors in the 6502 processor?
> I doubt it was really 68K transistors. If you multiply out the number of
> transistors needed to implement the registers and counters, then add 50% for
the
> ALU and double the whole thing for the control logic, you'll probably have as
> good a count.
>
> Keep in mind that gate counts can be manipulated quite a bit by the marketing
> guys. When you're building a gate, you can build a transistor with two
> emitters. That functions as an AND gate. If you need a 3-input AND gate,
> however, though it can be built with just another emitter the marketing guys
> will tell you it's actually three AND gates. Transistor counts are probably
not
> that important.
>
> Dick
>
> ----- Original Message -----
> From: "Brian Chase" <bdc_at_world.std.com>
> To: <classiccmp_at_classiccmp.org>
> Sent: Saturday, May 05, 2001 9:29 PM
> Subject: Re: How many transistors in the 6502 processor?
>
>
> > On Sat, 5 May 2001, Mike Cheponis wrote:
> >
> > > >From Microprocessor Report, in chronological order:
> >
> > > 6502: 4K transistors 21 mm^2
> >
> > Nice, now if I could only get enough info to implement one in TTL. :-)
> > Silly, yes, but it would be a fun project.
> >
> > > 68000 68K transistors 44 mm^2
> >
> > I thought this was an interesting coincidence... the 68K transistor
> > count I mean.
> >
> > -brian.
> >
> >
>
Received on Sun May 06 2001 - 12:30:08 BST