[comp.sys.ibm.pc] Microprocessors

danm@tekig5.TEK.COM (Daniel Milliron) (11/18/87)

I have had experience programming early Intel processors, but am not real
familiar with the 80x86 or 680x0.  Everything I have heard says "Motorola is
better" but no one ever says why.  Could someone who knows why (or why not)
please email me an explanation?  I will summarize for the net.  I should be
reachable via "danm@tektronix".  Thanks,


Dan Milliron

hoff@hp-sdd.HP.COM (Tom Hoff) (11/18/87)

In article <2175@tekig5.TEK.COM> danm@tekig5.TEK.COM (Daniel Milliron) writes:
>I have had experience programming early Intel processors, but am not real
>familiar with the 80x86 or 680x0.  Everything I have heard says "Motorola is
>better" but no one ever says why.  Could someone who knows why (or why not)

Blowtorch ready...

Here we go again - another "My microprocessor is better than yours!" battle.
Why even bother asking?  If you have an application for a microprocessor, then
YOU should weigh the advantages and disadvantages of each availiable uP and
then YOU will know which one is better for YOUR application.  No matter what
anyone thinks about a particular uP, IBM PC's still use Intel and MAC's still
use Motorola.  Obviously, IBM thinks Intel is better and Apple thinks Motorola
is better.  Why don't you ask THEM why???

Blowtorch off.   Now I feel better...

--Tom


-- 
     Tom Hoff (...!hplabs!hp-sdd!hoff)
	"Dammit Jim, I'm a programmer not a spokesman!"

howard@cpocd2.UUCP (11/19/87)

In article <2175@tekig5.TEK.COM> danm@tekig5.TEK.COM (Daniel Milliron) writes:
>I have had experience programming early Intel processors, but am not real
>familiar with the 80x86 or 680x0.  Everything I have heard says "Motorola is
>better" but no one ever says why.  Could someone who knows why (or why not)
>please email me an explanation?  I will summarize for the net.  I should be
>reachable via "danm@tektronix".  Thanks,

This topic is more appropriate for comp.arch, where it has been beat senseless
(but not, alas, to death) for several months.  In particular, many major flaws
in the Byte "benchmark" of the 80386 versus the 68030 were dissected there in
detail.  There's really no need to rehash this topic in newsgroups where more
heat and less light are likely to prevail.

-- 
	Howard A. Landman
	{oliveb,hplabs}!intelca!mipos3!cpocd2!howard
	howard%cpocd2.intel.com@RELAY.CS.NET
	80386: A half-decent architecture.  Guess which half!

jnp@calmasd.UUCP (11/19/87)

(Tom Hoff) writes:
> (Daniel Milliron) writes:
> >Everything I have heard says "Motorola is
> >better" but no one ever says why.  Could someone who knows why (or why not)
> 
> Obviously, IBM thinks Intel is better and Apple thinks Motorola
> is better.  Why don't you ask THEM why???

When the IBM PC was being designed the Intel 8088/6 was already available in
trial quantities - it was available in production quantities before the PC
hit the streets.  Motorola's 68000 wasn't yet that far along at the time -
so it never was really a candidate.

The fact is that IBM *DOES* use the 68000 - in their XT/370 and AT/370 - in
fact there are 2 in there - 1 is standard and the other is a
modification/special 68000 - the 8088 and 80286's are used as I/O processors
when these machines are in 370 mode.

Question: Does IBM still make/sell the xt/at/370?

-- 
These opinions are solely mine and in no way reflect those of my employer.  
John M. Pantone @ GE/Calma R&D, Data Management Group, San Diego
...{ucbvax|decvax}!sdcsvax!calmasd!jnp          jnp@calmasd.GE.COM

parker@epiwrl.EPI.COM (Alan Parker) (11/22/87)

In article <2530@calmasd.GE.COM> jnp@calmasd.GE.COM (John Pantone) writes:
>(Tom Hoff) writes:
>When the IBM PC was being designed the Intel 8088/6 was already available in
>trial quantities - it was available in production quantities before the PC
>hit the streets.  Motorola's 68000 wasn't yet that far along at the time -
>so it never was really a candidate.
>
Is that right?   I'm pretty sure that my lab had some Sun workstations
(first model) before IBM PCs hit the street.   I could be wrong.

carroll@snail.CS.UIUC.EDU (11/23/87)

	As an assembler hacker, I prefer the '86 family; it lets me get
down and dirty, and my code is usually much faster than on a 68K. On
the other hand, my friends who do compiler work wish Intel would fall off
into an tar pit somewhere. The 68K is much easier to build a code-
generator for. So, which is better depends very much on your definition
of better. What are you going to be doing with it?

dwb@apple.UUCP (David W. Berry) (11/25/87)

In article <1818@epiwrl.EPI.COM> parker@epiwrl.EPI.COM (Alan Parker) writes:
>In article <2530@calmasd.GE.COM> jnp@calmasd.GE.COM (John Pantone) writes:
>>(Tom Hoff) writes:
>>When the IBM PC was being designed the Intel 8088/6 was already available in
>>trial quantities - it was available in production quantities before the PC
>>hit the streets.  Motorola's 68000 wasn't yet that far along at the time -
>>so it never was really a candidate.
>>
>Is that right?   I'm pretty sure that my lab had some Sun workstations
>(first model) before IBM PCs hit the street.   I could be wrong.
	I don't know about that, but I was working at Fortune when
the PC was released and they'd been selling (or at least trying to :-)
68000 unix boxes for some time.  The reasoning I'd heard was that IBM
was able to get Intel to commit to selling "only" to IBM for some
period in order to let IBM get a foothold in the market.  Motorola
was less than willing to do so because they already had vendors
selling the things.


-- 
	David W. Berry
	dwb@well.uucp                   dwb@Delphi
	dwb@apple.com                   973-5168@408.MaBell
Disclaimer: Apple doesn't even know I have an opinion and certainly
	wouldn't want if they did.

ignatz@chinet.UUCP (Dave Ihnat) (11/29/87)

Actually, I also remember that they came out with the 68000, but the
support chips--most especially, the MMU--didn't come out until later,
thus crippling its initial penetration of the market...
-- 
			Dave Ihnat
			ihnp4!homebru!ignatz || ihnp4!chinet!ignatz
			(w) (312) 882-4673

socha@drivax.UUCP (Henri J. Socha (7-x6628)) (11/30/87)

[RE: the recent flames (OOPS:-) discussion about why IBM picked the 8088 and not
the 68000 for the IBM-PC.
	Many reasons were given including the one below.]

In article <1921@chinet.UUCP> ignatz@chinet.UUCP (Dave Ihnat) writes:
>Actually, I also remember that they came out with the 68000, but the
>support chips--most especially, the MMU--didn't come out until later,
>thus crippling its initial penetration of the market...
>			Dave Ihnat

OK, there are at least 3 Motorolans on the net in the MAC group
that I know of who were are Motorola when IBM came around asking about
the future IBM-PC.  They would know the timing.
They would have first hand knowledge about why/when Motorola didn't sell
IBM on the 68000  (or 6809 for that matter.  It's timing was almost right.)

Now, my knowledge is second hand. So I would rather they do it.

OK you SuperConductor's   Say IT!


-- 
UUCP:...!amdahl!drivax!socha                                      WAT Iron'75
"Everything should be made as simple as possible but not simpler."  A. Einstein