Saul Luizaga wrote:
> the mouse is not working well enough for the USB port but enough to 
> "hand shake" with the PS2 interface.

If the adaptor is simple, there's virtually no electronics in it, and 
what you really have is a mouse that will do either, with the signals 
going over different pins.

> I really would like to know why this happens.

Check your BIOS for "legacy USB support" - that means to recognise mouse 
and keyboard on USB ports.  That's all I can think of offhand.

-- 
   Darren New / San Diego, CA, USA (PST)
     On what day did God create the body thetans?

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Darren New wrote:
> Saul Luizaga wrote:
>> the mouse is not working well enough for the USB port but enough to 
>> "hand shake" with the PS2 interface.
> 
> If the adaptor is simple, there's virtually no electronics in it, and 
> what you really have is a mouse that will do either, with the signals 
> going over different pins.

hmm, I think may have very simple electronics since both are serial 
ports and would explain why the flawlessness of the buggy USB mouse 
interface. At least is what I think.

>> I really would like to know why this happens.
> 
> Check your BIOS for "legacy USB support" - that means to recognise mouse 
> and keyboard on USB ports.  That's all I can think of offhand.
> 
Already did Darren, i'm a PC tech so was the first thing to check :)

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Saul Luizaga wrote:
> hmm, I think may have very simple electronics

You never read the USB spec, did you? It's actually rather complex. :-) 
That it's serial is like saying "SATA is serial" or "SONET is serial."

> Already did Darren, i'm a PC tech so was the first thing to check :)

Cool. Heck, *I* didn't know what it meant six months ago. :-)

-- 
   Darren New / San Diego, CA, USA (PST)
     On what day did God create the body thetans?

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Darren New wrote:
> Saul Luizaga wrote:
>> hmm, I think may have very simple electronics
> 
> You never read the USB spec, did you? It's actually rather complex. :-) 
> That it's serial is like saying "SATA is serial" or "SONET is serial."

aren't they? maybe complexfor the very high speeds but AFAK they are 
serial techs, similar to PCI-Express.

>> Already did Darren, i'm a PC tech so was the first thing to check :)
> 
> Cool. Heck, *I* didn't know what it meant six months ago. :-)
> 
good for you :)

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Saul Luizaga wrote:
> Darren New wrote:
>> Saul Luizaga wrote:
>>> hmm, I think may have very simple electronics
>>
>> You never read the USB spec, did you? It's actually rather complex. 
>> :-) That it's serial is like saying "SATA is serial" or "SONET is 
>> serial."
> 
> aren't they? maybe complexfor the very high speeds but AFAK they are 
> serial techs, similar to PCI-Express.

I don't know about PCI-Express, but I'm just saying the fact that 
they're serial doesn't make them "simple". The USB spec is something 
like 250 pages or so, and that's just for the basics shared by all USB 
devices, like the ability to plug in, be recognised, and sync with the host.

(SONET is what telcos use to put voice and data over fiber, multiplexed. 
It's not simple either. :)

-- 
   Darren New / San Diego, CA, USA (PST)
     On what day did God create the body thetans?

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Saul Luizaga wrote:

>> You never read the USB spec, did you? It's actually rather complex. 
>> :-) That it's serial is like saying "SATA is serial" or "SONET is 
>> serial."
> 
> aren't they? maybe complexfor the very high speeds but AFAK they are 
> serial techs, similar to PCI-Express.

USB has a whole communications protocol to go with it. Think about 
TCP/IP and how complicated that is, and you get some idea of how much 
work a typical USB device has to do in order to work. Sure, the 
*physical* signalling is a simple serial bus, but if you want to *do* 
anything with it... ;-)

*continues stalking Darren*

-- 
http://blog.orphi.me.uk/
http://www.zazzle.com/MathematicalOrchid*

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> Saul Luizaga wrote:
> 
>>> You never read the USB spec, did you? It's actually rather complex. 
>>> :-) That it's serial is like saying "SATA is serial" or "SONET is 
>>> serial."
>>
>> aren't they? maybe complexfor the very high speeds but AFAK they are 
>> serial techs, similar to PCI-Express.
> 
> USB has a whole communications protocol to go with it. Think about 
> TCP/IP and how complicated that is, and you get some idea of how much 
> work a typical USB device has to do in order to work. Sure, the 
> *physical* signalling is a simple serial bus, but if you want to *do* 
> anything with it... ;-)

And also think of the hundreds of protocols you can talk over TCP.

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>> USB has a whole communications protocol to go with it. Think about 
>> TCP/IP and how complicated that is, and you get some idea of how much 
>> work a typical USB device has to do in order to work. Sure, the 
>> *physical* signalling is a simple serial bus, but if you want to *do* 
>> anything with it... ;-)
> 
> And also think of the hundreds of protocols you can talk over TCP.

Well, yeah, beyond the basic USB spec, there's the Mass Storage Device 
protocol (pendrives and external HD enclosures) and the Human Interface 
Device protocol (keyboards and mice) and various printer and scanner 
protocols (those tend to be proprietry) and...

For example, did you know that a USB device is supposed to "ask 
permission" before drawing more than X amount of current? (Most USB mug 
warmers disregard that part of the spec.) The idea being that if you 
have a powered hub, it can warn the attached device "no, don't do that" 
if the total load would be too great.

And that's something that *all* USB devices are supposed to do. Also, 
you can plug USB hubs into USB hubs to create quite extensive tangles of 
devices. And yet, the host has to be able to address each device 
individually. So an addressing and routing problem exists. Not nearly as 
severe as on the Internet (there is only 1 master and many slaves here, 
which simplifies greatly), but it's still nontrivial to overcome. Each 
USB device needs to end up with a unique ID so you can talk to it, and 
all the intervening hubs need to know how to route traffic to it correctly.

USB is *way* more than "just a serial protocol"...

-- 
http://blog.orphi.me.uk/
http://www.zazzle.com/MathematicalOrchid*

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> For example, did you know that a USB device is supposed to "ask 
> permission" before drawing more than X amount of current? (Most USB mug 
> warmers disregard that part of the spec.) The idea being that if you 
> have a powered hub, it can warn the attached device "no, don't do that" 
> if the total load would be too great.

Yes, and that's about the *only* interesting fact I knew about it :)

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Orchid XP v7 wrote:
> *physical* signalling is a simple serial bus,

Not even that, when you consider USB 2 and USB 1 over the same wires.

-- 
   Darren New / San Diego, CA, USA (PST)
     On what day did God create the body thetans?

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