USB Isoch in UM for XP and Vista

Hi Folks

I wonder what the SP is on USB Isoch from user mode, for both XP and Vista.

I have a project coming up requiring reasonable USB isochronous performance.
It would be great to do it all in user mode, but last I heard the user mode
support for USB was limited to Vista and did not include isochronous
operation.

Is this still the case? Or is there a timeframe for the above?

Many thanks

Mike

Mike Kemp wrote:

I wonder what the SP is on USB Isoch from user mode, for both XP and
Vista.

“What the SP is”? I don’t know what that means.

I have a project coming up requiring reasonable USB isochronous
performance. It would be great to do it all in user mode, but last I
heard the user mode support for USB was limited to Vista and did not
include isochronous operation.

Is this still the case? Or is there a timeframe for the above?

Yes and no. UMDF works in XP as well as Vista, but it still can’t do
isochronous.

If you’re interested in having someone else do a kernel driver for you,
contact me off-list.


Tim Roberts, xxxxx@probo.com
Providenza & Boekelheide, Inc.

Sorry all, “SP” == “starting price” == “the inside information”. Apologies
for the argot, shows the perils of the acronyms we all so enjoy. M :slight_smile:

>>----- Original Message -----
From: Tim Roberts
To: Windows System Software Devs Interest List
Sent: Tuesday, June 10, 2008 6:07 PM
Subject: Re: [ntdev] USB Isoch in UM for XP and Vista

Mike Kemp wrote:

I wonder what the SP is on USB Isoch from user mode, for both XP and
Vista.

“What the SP is”? I don’t know what that means.

I have a project coming up requiring reasonable USB isochronous
performance. It would be great to do it all in user mode, but last I heard
the user mode support for USB was limited to Vista and did not include
isochronous operation.

Is this still the case? Or is there a timeframe for the above?

Yes and no. UMDF works in XP as well as Vista, but it still can’t do
isochronous.

If you’re interested in having someone else do a kernel driver for you,
contact me off-list.


Tim Roberts, xxxxx@probo.com
Providenza & Boekelheide, Inc.


NTDEV is sponsored by OSR

For our schedule of WDF, WDM, debugging and other seminars visit:
http://www.osr.com/seminars

To unsubscribe, visit the List Server section of OSR Online at
http://www.osronline.com/page.cfm?name=ListServer

You’re not discussing pricing issues on this list, right? I KNOW you couldn’t be doing that, because doing that would against the list rules…

Peter
OSR

Oh dear, sorry for the confusion. The expression SP “starting price” means
“inside information”. I believe it derives from racecourse betting, where
the “insider” knows the odds but the punter doesn’t. Therefore, “the full
SP” means the inside info that this list is so good at providing (and not
“yet another MS update”). I thought this was a common expression, since
I’ve never been to a horse race but seem to have absorbed it anyway.
However, it sounds like I was wrong, so if I suggest that the “The NT
Insider” is renamed “NT: The Full SP” I guess it would not get many votes??
M :slight_smile: (Maybe its because I’m a Londoner, if you can Adam and Eve it m’ old
china, but its on Google too)

>>>>----- Original Message -----
From: xxxxx@osr.com
To: Windows System Software Devs Interest List
Sent: Wednesday, June 11, 2008 3:17 PM
Subject: RE:[ntdev] USB Isoch in UM for XP and Vista

You’re not discussing pricing issues on this list, right? I KNOW you
couldn’t be doing that, because doing that would against the list rules…

Peter
OSR


NTDEV is sponsored by OSR

For our schedule of WDF, WDM, debugging and other seminars visit:
http://www.osr.com/seminars

To unsubscribe, visit the List Server section of OSR Online at
http://www.osronline.com/page.cfm?name=ListServer

Take my word for it that it is a very strange expression. Even stranger
than the British use of bonnet in a context other than Easter.

“Mike Kemp” wrote in message news:xxxxx@ntdev…
> Oh dear, sorry for the confusion. The expression SP “starting price” means
> “inside information”. I believe it derives from racecourse betting, where
> the “insider” knows the odds but the punter doesn’t. Therefore, “the full
> SP” means the inside info that this list is so good at providing (and not
> “yet another MS update”). I thought this was a common expression, since
> I’ve never been to a horse race but seem to have absorbed it anyway.
> However, it sounds like I was wrong, so if I suggest that the “The NT
> Insider” is renamed “NT: The Full SP” I guess it would not get many
> votes?? M :slight_smile: (Maybe its because I’m a Londoner, if you can Adam and Eve
> it m’ old china, but its on Google too)
>
>>>>>>----- Original Message -----
> From: xxxxx@osr.com
> To: Windows System Software Devs Interest List
> Sent: Wednesday, June 11, 2008 3:17 PM
> Subject: RE:[ntdev] USB Isoch in UM for XP and Vista
>
>
> You’re not discussing pricing issues on this list, right? I KNOW you
> couldn’t be doing that, because doing that would against the list rules…
>
> Peter
> OSR
>
>
> —
> NTDEV is sponsored by OSR
>
> For our schedule of WDF, WDM, debugging and other seminars visit:
> http://www.osr.com/seminars
>
> To unsubscribe, visit the List Server section of OSR Online at
> http://www.osronline.com/page.cfm?name=ListServer
>

David Craig wrote:

Take my word for it that it is a very strange expression. Even stranger
than the British use of bonnet in a context other than Easter.

I can kind of see this expression creeping in to use among the marketing
department, where financial analogies rule. Instead of “give us the
basic information”, or “what’s the 411 on that”, they’d say “what’s the
starting price on this topic?”

Personally, my favorite British/American clash happens when some
American in a mixed audience mentions the use of a fanny pack. That
word has SIGNIFICANTLY different meanings on the two sides of the
Atlantic…


Tim Roberts, xxxxx@probo.com
Providenza & Boekelheide, Inc.

And to think I’ve always prided myself on being able to speak British English – having spent considerable time in Britain, and even having managed a group of engineers located there.

Ah, “separated by a common language” indeed…

Peter
OSR