BB Jasper Slow Boot Glitch fix with TX cool runner

seanr28

seanr28

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Mar 7, 2004
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So far I have sucessfully done 4 slims, 3 falcons and 1 zephr, and this si the 2nd 512Mb jasper that I'm having issues with, xell evntually boots after about 30 seconds, CPU key correct and freeboot image created via latest Jtag tool, flshed back correctly, but will not glitch so far its getting on for 4 minutes, any suggestions

after flashing the freeboot, it wont even glitch and show xell, what am I doint wrong?

Green light on TX CR is flashing as its supposed to.

update, just re-flashed the ecc file, took nearly 5 minutes to glitch, I have installed it correctly including placement of the wires exactly as the TX diagrams show, clearly this is not a soldering issue, but why is it taking so long to glitch??
 
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seanr28

seanr28

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Mar 7, 2004
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Re: Jasper Glitch issue with TX cool runner

Just a little update, after reading other forums, it has been suggested to put a 680pf cap between Gnd and Point A, I have done and it now glitches in under 30 seconds almost every time. It would aslo appear that many people are having the same trouble with BB jaspers.....
 
manwithoutname

manwithoutname

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Jun 4, 2010
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Re: Jasper Glitch issue with TX cool runner

Sean, did you test for continuity between GND & point A before soldering the cap? If not, might be worth removing and testing again. I would do it my self but not back home until Tuesday night.
 
Ubergeek

Ubergeek

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Feb 24, 2003
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I've never had an issue with a jasper. Only one I've ever had issues with is zephyr.

Saying that each console is different. If this is a fix that worked for your situation we will look at it further but we've never had an issue and between all our testers we've fitted to hundreds now
 
seanr28

seanr28

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Mar 7, 2004
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Re: Jasper Glitch issue with TX cool runner

manwithoutname said:
Sean, did you test for continuity between GND & point A before soldering the cap? If not, might be worth removing and testing again. I would do it my self but not back home until Tuesday night.
Click to expand...

Mate, trust me, Ive spent ages trying to get the damm thing to glitch!, I tried several caps and this was the only one that booted immediatley! The soldering is fine.

This is also the 2nd 512mb jasper that I have used the TX cool runner on and it had exactly the same issue! (until I overheated one of the resistors!)

---------- Post added at 22:13 ---------- Previous post was at 22:11 ----------

Ubergeek said:
I've never had an issue with a jasper. Only one I've ever had issues with is zephyr.
Click to expand...

Ubber, how many BBJaspers did you test it on? I am only curious as it seems to be quite common
 
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[AD]

[AD]

Staff member
Troll Eating Dogs
Dec 8, 2002
815
43
Bolton, Lancs. UK
Re: Jasper Glitch issue with TX cool runner

I have a 512mb Jasper thats doing the same. I thought it was due to the bad block at 003a thats remapped to 1FF. But will check out the cap tomorrow morning :)

-=AD=-
 
Podger

Podger

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Sep 8, 2004
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Re: Jasper Glitch issue with TX cool runner

That cap is 68nf

683 = 68 with 3 0's = 68000pf = 68 nf

Got similar news today from Oggy, he used 682, albeit incorrectly it worked...
 
seanr28

seanr28

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Mar 7, 2004
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Re: Jasper Glitch issue with TX cool runner

[AD] said:
I have a 512mb Jasper thats doing the same. I thought it was due to the bad block at 003a thats remapped to 1FF. But will check out the cap tomorrow morning :)

-=AD=-
Click to expand...

be carefull on what cap you use, I tired several 680pf caps, but this one (from maplins) was the only one that made it glitch, I have been playing around withit all evening and even when warm, boots xell pretty much as soon as its powered on and to dash in 4 seconds every time.......I'm amazed and also very pleased with t he results:)
 
[AD]

[AD]

Staff member
Troll Eating Dogs
Dec 8, 2002
815
43
Bolton, Lancs. UK
Re: Jasper Glitch issue with TX cool runner

Ill get the same cap from maplins in the morning and post results.

Been pulling my hair out with it for 2 days.

-=AD=-
 
D

Drefsab

Full Member
Oct 27, 2009
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Oldham
Re: Jasper Glitch issue with TX cool runner

Im quite interested to find out as well I have my coolrunner for a jasper with a 512mb NAND. I've not tried to install it yet (still can't get ahold of the QSB's or update cables yet in the UK), but think I will pick up the right cap so I can glitch it properly.
 
Martin C

Martin C

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Jan 10, 2004
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Re: Jasper Glitch issue with TX cool runner

seanr28 said:
so what is it then??
Click to expand...
Cap numbering is like resistor numbering.

Three digits.

1st two digits is the number in pF
3rd digit is the number of zeroes.

so 683 is 68 000, so 68nF as already indicated.

A 681 is what you were probably after.

As I'd said before, a 680pF between the two points you have yours on and a 680pF in line with CPU_RST seems to work extremely well for me.
 
seanr28

seanr28

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Mar 7, 2004
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Re: Jasper Glitch issue with TX cool runner

Martin C said:
Cap numbering is like resistor numbering.

Three digits.

1st two digits is the number in pF
3rd digit is the number of zeroes.

so 683 is 68 000, so 68nF as already indicated.

A 681 is what you were probably after.

As I'd said before, a 680pF between the two points you have yours on and a 680pF in line with CPU_RST seems to work extremely well for me.
Click to expand...

Martin,

Thanks for that, its interesting though as this is what maplins actually suggested once I told them what I was after.

Either way, I have no other 360 thats as fast as this one.
 
Martin C

Martin C

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Re: Jasper Glitch issue with TX cool runner

The one I had which wouldn't glitch at all (well, it did but VERY infrequently) was resolved with 2 x 680pF caps. It now boots within 5-7 secs every time.
 
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