Yes, but there are similar constructs, e.g. multi-gate mosfets.
Dick
----- Original Message -----
From: "Sipke de Wal" <sipke_at_wxs.nl>
To: <classiccmp_at_classiccmp.org>
Sent: Sunday, May 06, 2001 11:30 AM
Subject: Re: How many transistors in the 6502 processor?
> 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 - 13:51:18 BST