6 May
2001
6 May
'01
5:30 a.m.
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
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http://xgistor.ath.cx
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----- Original Message -----
From: Richard Erlacher <edick(a)idcomm.com>
To: <classiccmp(a)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(a)world.std.com>
To: <classiccmp(a)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.