Hi Todd, That URL didn't work for me either, but I did find another description at: http://msdn.microsoft.com/library/default.asp?url=/library/en -us/kmarch/hh/kmarch/other_7iqv.asp[1] Alternatively, you should be able to navigate to: "MSDN Home >MSDN Library >Kernel-Mode Driver Architecture >Design Guide >Driver Programming Techniques " and the name of the topic is: "Using Floating Point or MMX in a WDM Driver" It looks like there are still serious limitations when trying to use the FPU from Win9x/Me! You can't use it from a DPC, and you cannot even use it while handling an ioctl (even though you're at passive irql). You can only use it from a work-item or worker threads! Thanks. Devendra. At 09:50 AM 10/23/2002, Hager, Todd wrote: Noel, I am unable to access the link you provided - I get a "Page cannot be found" error. Is it just me or is the link bad? Todd Hager Dolby Labs -----Original Message----- From: Noel Cross [mailto:noelc@xxxxxxxxxxxxx[2]] Sent: Tuesday, October 22, 2002 5:49 PM To: wdmaudiodev@xxxxxxxxxxxxx Subject: [wdmaudiodev] Re: Floating Point in the Kernel Check out the DDK article:=20 http://msdn.microsoft.com/library/default.asp?url=3D/library/en-us/kmarch=/h[3] h/kmarch/k105_91de.asp Regards, Noel Cross Development Lead, Audio/Video Devices Group This posting is provided "AS IS" with no warranties, and confers no rights. -----Original Message----- From: Devendra Parakh [mailto:parakh@xxxxxxxxxxxxxxxxxxxx]=20[4] Sent: Tuesday, October 22, 2002 2:16 PM To: wdmaudiodev@xxxxxxxxxxxxx Subject: [wdmaudiodev] Floating Point in the Kernel Hi, What are the restrictions for using floating point in the kernel? All I need to do is convert between 32bit ints and 32bit floats. I think I can use FLOATOBJ, but I was hoping for a better alternative. The driver will only run under Windows XP, so ME/9x is not really a concern for me. Thanks. Devendra. Devendra Parakh Singing Electrons, Inc. http://www.singingelectrons.com[1[5]] 425-889-2478=20 --- Links --- 1 http://www.singingelectrons.com/[6] ****************** WDMAUDIODEV addresses: Post message: mailto:wdmaudiodev@xxxxxxxxxxxxx[7] Subscribe: = mailto:wdmaudiodev-request@xxxxxxxxxxxxx?subject=3Dsubscribe[8] Unsubscribe: mailto:wdmaudiodev-request@xxxxxxxxxxxxx?subject=3Dunsubscribe[9] Moderator: mailto:wdmaudiodev-moderators@xxxxxxxxxxxxx[10] URL to WDMAUDIODEV page: http://www.wdmaudiodev.de/[11] ****************** WDMAUDIODEV addresses: Post message: mailto:wdmaudiodev@xxxxxxxxxxxxx[12] Subscribe: mailto:wdmaudiodev-request@xxxxxxxxxxxxx?subject=subscribe[13] Unsubscribe: mailto:wdmaudiodev-request@xxxxxxxxxxxxx?subject=unsubscribe[14] Moderator: mailto:wdmaudiodev-moderators@xxxxxxxxxxxxx[15] URL to WDMAUDIODEV page: http://www.wdmaudiodev.de/[16] -------------------- This message (including any attachments) may contain confidential information intended for a specific individual and purpose. If you are not the intended recipient, delete this message. If you are not the intended recipient, disclosing, copying, distributing, or taking any action based on this message is strictly prohibited. ****************** WDMAUDIODEV addresses: Post message: mailto:wdmaudiodev@xxxxxxxxxxxxx[17] Subscribe: mailto:wdmaudiodev-request@xxxxxxxxxxxxx?subject=subscribe[18] Unsubscribe: mailto:wdmaudiodev-request@xxxxxxxxxxxxx?subject=unsubscribe[19] Moderator: mailto:wdmaudiodev-moderators@xxxxxxxxxxxxx[20] URL to WDMAUDIODEV page: http://www.wdmaudiodev.de/[21] Devendra Parakh Singing Electrons, Inc. http://www.singingelectrons.com[22] 425-889-2478 --- Links --- 1 http://msdn.microsoft.com/library/default.asp?url=/library/en-us/kmarch/hh/kmarch/other_7iqv.asp 2 mailto:noelc@xxxxxxxxxxxxx 3 http://msdn.microsoft.com/library/default.asp?url=3D/library/en-us/kmarch=/h 4 mailto:parakh@xxxxxxxxxxxxxxxxxxxx%5D=20 5 http://www.singingelectrons.com[1/ 6 http://www.singingelectrons.com/ 7 mailto:wdmaudiodev@xxxxxxxxxxxxx 8 mailto:wdmaudiodev-request@xxxxxxxxxxxxx%3Fsubject=3Dsubscribe 9 mailto:wdmaudiodev-request@xxxxxxxxxxxxx%3Fsubject=3Dunsubscribe 10 mailto:wdmaudiodev-moderators@xxxxxxxxxxxxx 11 http://www.wdmaudiodev.de/ 12 mailto:wdmaudiodev@xxxxxxxxxxxxx 13 mailto:wdmaudiodev-request@xxxxxxxxxxxxx%3Fsubject=subscribe 14 mailto:wdmaudiodev-request@xxxxxxxxxxxxx%3Fsubject=unsubscribe 15 mailto:wdmaudiodev-moderators@xxxxxxxxxxxxx 16 http://www.wdmaudiodev.de/ 17 mailto:wdmaudiodev@xxxxxxxxxxxxx 18 mailto:wdmaudiodev-request@xxxxxxxxxxxxx%3Fsubject=subscribe 19 mailto:wdmaudiodev-request@xxxxxxxxxxxxx%3Fsubject=unsubscribe 20 mailto:wdmaudiodev-moderators@xxxxxxxxxxxxx 21 http://www.wdmaudiodev.de/ 22 http://www.singingelectrons.com/ ****************** WDMAUDIODEV addresses: Post message: mailto:wdmaudiodev@xxxxxxxxxxxxx Subscribe: mailto:wdmaudiodev-request@xxxxxxxxxxxxx?subject=subscribe Unsubscribe: mailto:wdmaudiodev-request@xxxxxxxxxxxxx?subject=unsubscribe Moderator: mailto:wdmaudiodev-moderators@xxxxxxxxxxxxx URL to WDMAUDIODEV page: http://www.wdmaudiodev.de/