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Location: Tampa Bay, FL
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pc motherboard design

10/04/2008 7:59 PM

I am an embedded software engineer but I'm really interested in the design of digital hardware. Does anyone know or have info on designing motherboards? I have some custom robotic projects of mine that I would really like to pursue. I know how to design hardware using microcontrollers, EEPROM, spi, and i2c devices, however, I now want to learn how to interface microprocessors to chipsets, ram, and PCIe cards. Where do I start?

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Guru
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#1

Re: pc motherboard design

10/04/2008 8:22 PM

Chip manufacturers of all kinds offer many many application notes on how to use their parts. There are a variety of PCB tutorials out there for the googling as well.

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#2
In reply to #1

Re: pc motherboard design

10/04/2008 8:34 PM

Gave you a GA vote.

You are right, surfing the chip manufacturer web sites is a good place to acquire knowledge. Lets see a show of hands for who used to read the parts catalogs of semiconductor companies? Mines up, hand that is.

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Guru
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#3

Re: pc motherboard design

10/04/2008 8:57 PM

You must be making a kidding,

you know all about hardware design, why not read interface white book for details?

its not difficulat for you to master all of these communications with cpu by either series or parallel terminal or bus way. (card)

Can I say, you are showing off?

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#8
In reply to #3

Re: pc motherboard design

10/06/2008 4:05 PM

I don't know ALL about hardware design. What I mean is that I know how to design microcontroller based hardware and that I have never designed a microprocessor based system architecture. I'm no show off. I just want to learn.

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Guru
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#9
In reply to #8

Re: pc motherboard design

10/08/2008 1:21 AM

Oh, sorry I misunderstand you.

this hardware structure is as same as a toy blocks. you can just link all chips arround cpu according to manual. address bus, data bus, link to correspond bus each other. control pins link to write and read signal parts and probe pin etc. its not diffult to config them. What you have to pay attention to is make pcb, the higher frequency the diffult to link them. some of them have to add a resistor to cancel oscillation, which can be found from pcb software. if the system is smalller, you can use two layers board, or you willuse 4 or 6 layer for convinient link line. this depend on experience.

in fact, learn pcb will take you more time than learn how to connect components.

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#4

Re: pc motherboard design

10/05/2008 4:57 AM

Unless you are an RF designer too, don't even think about designing a motherboard.
Unless of course you are a serious masochist.

Modern clock frequencies are up in the radar spectrum, and the boards are muliti layer.

Nothing wrong with designing your own microcontroller board...but don't try to do anything on the scale of a PC or at clock frquencies much over say 12mHz, this way you can get away with a double sided board if you are careful.

Del

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#5

Re: pc motherboard design

10/05/2008 5:35 AM

No Idea,

But--------

Standard motherboards available in market. why to invent again? what do you expect to improve in your motherboards,If you ask me its not one man job to design and fabricate complete motherboard.

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#6

Re: pc motherboard design

10/05/2008 11:37 PM

Hi jovan

1st of all before designing any robot u need 2 get xact info about all motions and sensors , den u need 2 decide appropriate processor , frankly tellin u designing a robot or a robotic machine is just like giving birth 2 a premature baby. so before designing any mother board or such , just start observing envoirment where u need to implicate ur robot with a state of mind dat what problems u'll face in that envoirment if u have only those senses & motions which u have planned to put into ur robot .

rest I have few years of xpernce in designing industrial robots as well dis is my hobby also since my high school days so i would definately like 2 help u if u can provide few more details 4 any such interaction u can mail me trikhaanmol@yahoo.co.in or call me +91-9216725229

regards

Anmol

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Power-User

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#7

Re: pc motherboard design

10/06/2008 7:24 AM

Dear Jovan,

Is it a motherboard, i.e. Asus with an Intel Duocore and hard disk drives, keyboard, monitor and software or could you use a PLC or multiple PLC's to start?

These are, typically 8-bit computers-on -a-chip. The PLC I work with is the Parallax 2 sx. The CPU can be either a Basic Stamp, a Java stamp, and an open source Propellor series. The carrier board, basically a small 'mother board' has a small prototyping area and additional RAM can be added via a daughter board. There are 4 servo ports ready to plug in and program. Additional ports and RAM are available, memory addresses are 0 to 65365. You get around the initial RAM problem via paging.

There are kits and various tutorials, great customer support, very good about replacing parts that have mysteriously exploded, and a very wide variety of applications.

Once you have chosen which chip, you may want to get additional blank EEPROMS to store you software. This saves you from using an UV burning unit, unless you actually need to burn. Otherwise it is 'soft programmed' and readily editable.

www.parallex.com

This is either way off base or a good place to start.

Good luck and keep us posted.

/Ari (Orpheuse)

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