[hpsdr] Mercury 2.6

[Doug Bade]

Phil;
Yes but I do not think it was in this case, at least not all the 
time... There are several usb controllers at several interrupts and 
all of them exhibit the same problem if I move the usb connection. I 
tried an above board PCI USB with a different interrupt to no avail. 
I also tried an above board PCI video board to no avail.. I cycled 
through all 4 ports on the back. they use IRQ 16,17,18 and 19 as well 
as 20 and 21 I think??? I am not really sure which port is on which 
controller... so I kept trying them all. The video is on IRQ16 for 
sure....the On board video.. I also tried messing with PCI priority 
in Bios with no change.. I disabled MB USB when I tried above board 
but could not get any better performance... I have no real grasp on 
why but I can say I tried a lot of NOTS :-) The motherboard does use 
shared video mem with the cpu.. but I found no bios adjustments to 
improve it... I cannot say I disabled the on board video.. as booting 
was problematic on the above board.. XP was giving me a hard time 
resetting to the above board which was an MX4000 series PCI dual Head 
VGA/Svideo board...

I do not know any easy way to figure out which port/interrrupt each 
port maps to as the id's are cryptic....

Doug




At 07:50 PM 2/16/2009, Phil Harman wrote:

>Hi Doug,
>
>Thanks for the offer but we are close to a new version of code that 
>should fix the problem.
>
>With the Atom 330 does the USB controller share an interrupt with 
>another device?
>
>Phil....
>
>
>
>Quoting Doug Bade <kd8b at thebades.net>:
>
>>The Atom 330 intel mini itx boards all seem to do it....at least 
>>those of us running the HPSDR this way who have compared notes find 
>>this.. Even 96K at 2048 no longer works it distorts as he 
>>describes.. interestingly the CPU load is only about 12-18 % even 
>>when it is popping and distorting... I have had to drop to 96k 1024 
>>to get it to work 99% as it still pops once in a while.. 96k 512 is 
>>good audio but cpu load starts climbing..... Not complaining but it 
>>has gotten worse with later releases of code. Would it help to have 
>>one of these boards shipped to one of you for tests??? they are not 
>>real expensive....and small enough to ship cheap..
>>
>>I would volunteer mine as you have your own Mercury etc... :-) The 
>>board runs on 160w ps so about anything you have laying around runs it...
>>
>>Doug
>>KD8B
>>
>>
>>At 07:05 PM 2/16/2009, Phil Harman wrote:
>>>***** High Performance Software Defined Radio Discussion List *****
>>>
>>>
>>>Hi Jeff,
>>>
>>>Thanks for your tests.  We are working hard on tracking down the 
>>>reason for the popping at 192k and 2048 buffer. Neither Bill, 
>>>KD5TFD, nor I can reproduce the problem which makes fixing it a little harder.
>>>
>>>I've never been able to run at 192k with 256 buffers with any 
>>>version of the code.
>>>
>>>73's Phil...VK6APH
>>>
>>>
>>>
>>>
>>>Quoting Jeff Cook <jeffrie at talktalk.net>:
>>>
>>>>***** High Performance Software Defined Radio Discussion List *****
>>>>
>>>>These are my observations regarding Mercury 2.6
>>>>
>>>>                                              _Primary_
>>>>
>>>>Sample Rate             Buffer Size                    Result
>>>>
>>>>192,000                         2048
>>>>      Popping
>>>>
>>>>192,000                         1024
>>>>      Good
>>>>
>>>>192,000                         512
>>>>       Good
>>>>
>>>>192,000                         256
>>>>       Break up
>>>>
>>>>
>>>>                                                _VAC_
>>>>
>>>>192,000                         2048
>>>>      Gross Distortion
>>>>
>>>>192,000                         1024
>>>>      Popping
>>>>
>>>>192,000                         512
>>>>       popping
>>>>
>>>>192,000                         256
>>>>       Gross Breakup
>>>>
>>>>96,000                           Any
>>>>       Good
>>>>
>>>>In my view HPSDR is the best thing to happen in ham radio for years.
>>>>It, together with the software offers a degree of control that 
>>>>I've never experienced in a radio before.
>>>>
>>>>Jeff Cook G0AFQ.
>>>>
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>>>
>>>
>>>
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>
>
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