Is microprocessor an integrated circuit???

[yogesh]

Is microprocessor an integrated circuit???

regards,
ypj

 

[Jim Thompson]

On 26 Jan 2005 06:34:04 -0800, ypjofficial@indiatimes.com (yogesh)
wrote:

Is microprocessor an integrated circuit???

regards,
ypj

Maybe, Why do you want to know ?

...Jim Thompson
--
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona Voice480)460-2350 | |
| E-mail Address at Website Fax480)460-2142 | Brass Rat |
| http://www.analog-innovations.com | 1962 |

I love to cook with wine. Sometimes I even put it in the food.

 

[Fred Bloggs]

yogesh wrote:

Is microprocessor an integrated circuit???

regards,
ypj

Get lost!- and don't post to this newsgroup again.

 

[Jim Thompson]

On Wed, 26 Jan 2005 11:07:03 -0800, Jamie
<jamie_5_not_valid_after_5_Please@charter.net> wrote:

Fred Bloggs wrote:



yogesh wrote:

Is microprocessor an integrated circuit???

regards,
ypj


Get lost!- and don't post to this newsgroup again.

oh have a heart! :/

Fred is the one that should get lost.

...Jim Thompson
--
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona Voice480)460-2350 | |
| E-mail Address at Website Fax480)460-2142 | Brass Rat |
| http://www.analog-innovations.com | 1962 |

I love to cook with wine. Sometimes I even put it in the food.

 

[Jamie]

Fred Bloggs wrote:

yogesh wrote:

Is microprocessor an integrated circuit???

regards,
ypj


Get lost!- and don't post to this newsgroup again.

oh have a heart! :/

 

[Bradley1234]

Answer: it can be. Some microprocessors are made with discrete components,
but most today are integrated circuits, meaning the components have been
built onto one circuit

Microprocessor means: micro programmed processor such that instructions are
processed by referencing internal memory locations and there is a processor
within a processor.

Most commercial microprocessors are general purpose, meaning the instruction
set gives developers methods to move/control data, but some uPs are specific
and have a limited/specific instruction set




"yogesh" <ypjofficial@indiatimes.com> wrote in message
news:f88a27e4.0501260634.1fe8ccb8@posting.google.com...

Is microprocessor an integrated circuit???

regards,
ypj

 

[Keith Williams]

In article <DQPJd.18$u45.10@trnddc08>, someone@yahoo.com says...

Answer: it can be. Some microprocessors are made with discrete components,
but most today are integrated circuits, meaning the components have been
built onto one circuit

Microprocessor means: micro programmed processor such that instructions are
processed by referencing internal memory locations and there is a processor
within a processor.

Yikes!

Most commercial microprocessors are general purpose, meaning the instruction
set gives developers methods to move/control data, but some uPs are specific
and have a limited/specific instruction set

--
Keith

 

[TCS]

On Wed, 26 Jan 2005 16:47:31 GMT, Bradley1234 <someone@yahoo.com> wrote:

Answer: it can be. Some microprocessors are made with discrete components,
but most today are integrated circuits, meaning the components have been
built onto one circuit

Microprocessor means: micro programmed processor such that instructions are
processed by referencing internal memory locations and there is a processor
within a processor.

No it doesn't. It means micro-sized processor. What you're describing also
includes the vax-11/780 whose processor board was hardly a microprocessor.

A microprocessor is nearly always a single chip processor; first one was the
4004; following were the 8080, 6800, 1802, etc. I don't bit slice processors
could be considered a microprocessor.

 

[Bradley1234]

Microprocessor means: micro programmed processor such that instructions
are
processed by referencing internal memory locations and there is a
processor
within a processor.

No it doesn't. It means micro-sized processor. What you're describing
also
includes the vax-11/780 whose processor board was hardly a
microprocessor.

and by the way, most 8 bit microprocessors weren't microprogrammed. Their
instructions units were hard wired.

You will want to revise the last sentence.

The instruction units were hard wired with... microprogramming. The
instruction is fetched and what happens? it references a memory inside the
cpu, a processor within a processor running micro code

 

[Keith Williams]

In article <9QRJd.36$lg5.7@trnddc06>, someone@yahoo.com says...

Microprocessor means: micro programmed processor such that instructions
are
processed by referencing internal memory locations and there is a
processor
within a processor.

No it doesn't. It means micro-sized processor. What you're describing
also
includes the vax-11/780 whose processor board was hardly a
microprocessor.

and by the way, most 8 bit microprocessors weren't microprogrammed. Their
instructions units were hard wired.

You will want to revise the last sentence.

The instruction units were hard wired with... microprogramming. The
instruction is fetched and what happens? it references a memory inside the
cpu, a processor within a processor running micro code

Nope. No microprogramming. The logic was hard wired. No control-
store, no microprogramming. Not all processors are microcoded.

--
Keith

 

[TCS]

On Wed, 26 Jan 2005 19:03:33 GMT, Bradley1234 <someone@yahoo.com> wrote:

Microprocessor means: micro programmed processor such that instructions
are
processed by referencing internal memory locations and there is a
processor
within a processor.

No it doesn't. It means micro-sized processor. What you're describing
also
includes the vax-11/780 whose processor board was hardly a
microprocessor.

and by the way, most 8 bit microprocessors weren't microprogrammed. Their
instructions units were hard wired.

You will want to revise the last sentence.

The instruction units were hard wired with... microprogramming. The

No they weren't. They were hardwired via logic.

 

[TCS]

On Wed, 26 Jan 2005 20:47:38 GMT, Bradley1234 <someone@yahoo.com> wrote:

"TCS" <The-Central-Scrutinizer@p.o.b.o.x.com> wrote in message

No they weren't. They were hardwired via logic.

This is simply not accurate. Microprocessors typically operate with
instruction and data fetch modes. When an instruction fetch takes place,
Which is irrelevent to wether or not a processor is microcoded.

the op code causes a branch to an internal memory of the internal cpu state
machine, running on an internal clock. This sets off a process where the
data portion of the instruction or subsequent fetches or registers are used
to manipulate data, or they set some status within the cpu state machine
again, irrelevent.

There is no simple hardwired logic, there is a stored program, a
wrong.

"microprogram" within the cpu that will "crack" the instruction like a
walnut and see whats inside and eat it if its fresh.
Or it can be done with combinational logic.

Microinstructions can be 100 bits wide, or for an 8-bit? I dont recall maybe
something like 43 bits wide, it depends.
or not at all.

When there is a micro engine, using micro instructions, stored in microcode
memory, its a micro processor. There is a clock, internal microcode address
generator, next address logic, mux. Can you name any 8 bit cpu that uses
only hard wired logic??

Some microprocessors have a microcoded instruction decoder. So do some
minicomputers.

 

[Andrew Holme]

Bradley1234 wrote:

PLEASE show an example of a microprocessor that doesnt use microcode

Broadly speaking, it depends whether the microprocessor is RISC or CISC:
RISC (Reduced Instruction Set) processors don't use microcode - they have
"hard-wired" logic; CISC (Complex Instruction Set) processors generally do
have microcode. The exact definitions of RISC and CISC are somewhat
contentious. The 6502, which is often said to be the first RISC processor,
was not microcoded.

 

[Spehro Pefhany]

On Wed, 26 Jan 2005 22:23:18 -0000, the renowned "Andrew Holme"
<andrew@nospam.com> wrote:

Bradley1234 wrote:
PLEASE show an example of a microprocessor that doesnt use microcode

Broadly speaking, it depends whether the microprocessor is RISC or CISC:
RISC (Reduced Instruction Set) processors don't use microcode - they have
"hard-wired" logic; CISC (Complex Instruction Set) processors generally do
have microcode. The exact definitions of RISC and CISC are somewhat
contentious. The 6502, which is often said to be the first RISC processor,
was not microcoded.

Are you sure? There are claims in Google Groups that die photos show a
fairly large microcode ROM on the chip, and many of the instructions
take quite a few more than the minimum 2 cycles (3, 4, 5, 6 or 7).

The PIC is often called "RISC", but it is apparently microcoded.


Best regards,
Spehro Pefhany
--
"it's the network..." "The Journey is the reward"
speff@interlog.com Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog Info for designers: http://www.speff.com

 

[TCS]

On Wed, 26 Jan 2005 17:24:24 -0500, Spehro Pefhany <speffSNIP@interlogDOTyou.knowwhat> wrote:

But I think most microprocessor cores do use microcode. CISC ones
certainly do, RISC ones may not.

However, that fact is irrelevent. Most minicomputers and many mainframes
use microcode as well and many microprocessors do not.

 

[TCS]

On Wed, 26 Jan 2005 22:23:18 -0000, Andrew Holme <andrew@nospam.com> wrote:

Bradley1234 wrote:
PLEASE show an example of a microprocessor that doesnt use microcode

Broadly speaking, it depends whether the microprocessor is RISC or CISC:
RISC (Reduced Instruction Set) processors don't use microcode - they have
"hard-wired" logic; CISC (Complex Instruction Set) processors generally do
have microcode. The exact definitions of RISC and CISC are somewhat
contentious. The 6502, which is often said to be the first RISC processor,
was not microcoded.

Nor were the 1802, 4004, 8080, z80, or z8000. I believe the 8085 and
6800 were hard coded as well.

There's a point when a processor is too complex to hard code. The Z8000
was the last of the hard coded microprocessors and it was a failure due to
it's numerous bugs.

 

[Ken Smith]

In article <KlTJd.90$lg5.2@trnddc06>, Bradley1234 <someone@yahoo.com> wrote:
[...]

This is simply not accurate. Microprocessors typically operate with
instruction and data fetch modes. When an instruction fetch takes place,
the op code causes a branch to an internal memory of the internal cpu state

Specifically not true in the 4004, 4040, CD1802, or Z80.


--
--
kensmith@rahul.net forging knowledge

 

[John Larkin]

On Wed, 26 Jan 2005 20:47:38 GMT, "Bradley1234" <someone@yahoo.com>
wrote:

When there is a micro engine, using micro instructions, stored in microcode
memory, its a micro processor. There is a clock, internal microcode address
generator, next address logic, mux. Can you name any 8 bit cpu that uses
only hard wired logic??

6800, 6802, 6803, 6805, probably the PICs.

Any RISC processor: SPARC, PowerPC, Arm, Coldfire.

AVR and Dragonball, I think.

The original PDP-11 wasn't microcoded; it had about 550 TTL/MSI chips.

John

 

[Michael Black]

"Andrew Holme" (andrew@nospam.com) writes:

Bradley1234 wrote:
PLEASE show an example of a microprocessor that doesnt use microcode

Broadly speaking, it depends whether the microprocessor is RISC or CISC:
RISC (Reduced Instruction Set) processors don't use microcode - they have
"hard-wired" logic; CISC (Complex Instruction Set) processors generally do
have microcode. The exact definitions of RISC and CISC are somewhat
contentious. The 6502, which is often said to be the first RISC processor,
was not microcoded.

The 6502 was never RISC.

It's only after RISC came along that some people thought it just meant
"few instructions" and then decided the 6502 fit that definition.

The 6502 wasn't particularly different from the 6800, or for that matter
the 8080.

Micahel

 

[Chaos Master]

In sci.electronics.design, Ken Smith wrote:

Most commercial microprocessors are general purpose, meaning the instruction
set gives developers methods to move/control data, but some uPs are specific
and have a limited/specific instruction set

To be more specific, some Reduced Instruction Set Computers (RISC) gain a
great deal of speed at the cost of removing certain instuctions. The
French have just introduced on that takes this to the limit. The NISC (No
Intruction Set Computer) has no instructions and is as a result infinitely
fast.

Maybe a SISC (Single Instruction Set Computer) with just NOP or HLT?

[]s
--
Chaos MasterŽ, posting from Canoas, Brazil - 29.55° S / 51.11° W / GMT-
2h / 15m

"He [Babya] is like the Energizer Bunny of hopeless newsgroup
posting....or should that be Energizer bBunny"
- "ceed" on alt.comp.freeware, 24/1/2005

(to some groups: Yes, I use Windows and MS Office. So what?)