thoughts on Digitech Space Station eprom copying?

[Govmnt_Lacky]

Mongo,

My advice would be to pull the additional RAMs and revert back to the XP200 EEPROM. See if you get the same problem.

If you have the same problem, then at least you have ruled out the additional RAMs and the new EEPROM. Bad news is that now it could be something else that is resident on the PCB or soldering.

This is assuming that this problem did not exist before the mod. Did you test it good before modding?

[mongo]

Mongo,

My advice would be to pull the additional RAMs and revert back to the XP200 EEPROM. See if you get the same problem.

If you have the same problem, then at least you have ruled out the additional RAMs and the new EEPROM. Bad news is that now it could be something else that is resident on the PCB or soldering.

This is assuming that this problem did not exist before the mod. Did you test it good before modding?

  Ohh hell I must confess I didn't test it before modding. I just assumed it was OK and just modded away as soon as I got it in the mail...

[Govmnt_Lacky]

Ohh hell I must confess I didn't test it before modding. I just assumed it was OK and just modded away as soon as I got it in the mail...

In this case, I would suggest putting the unit back to XP200 configuration and testing it. If the same problem exists then look at soldering for the new items you installed. If nothing comes from that, then you need to start looking at factory installed components. Check voltages while powered at different times (try to read them while the failure is occurring)

[MüThing]

So I'm looking at getting an XP-400 and starting off simple and just swapping out the stock eeprom for maybe the XP-100. I know you talked about it before Lacky but is the Mini Pro TL866CS still a decent programmer for this kind of thing?

[Govmnt_Lacky]

So I'm looking at getting an XP-400 and starting off simple and just swapping out the stock eeprom for maybe the XP-100. I know you talked about it before Lacky but is the Mini Pro TL866CS still a decent programmer for this kind of thing?

Yep! It is the one I still use 

Remember, if you are modding an XP400 into an XP100 (by just swapping out the EEPROM with one programmed with XP100 code) then you will only get the Whammy Wah in Mono. You will lose the Dry Out signal and get nothing from the stereo output.

[MüThing]

That's no problem with me, that'd be the only thing to do to get it up and running though?

[Govmnt_Lacky]

That's no problem with me, that'd be the only thing to do to get it up and running though?

If you are using a stock XP400 and want to change it into an XP100, then you only need to swap out the EEPROM with one that has the XP100 program on it.

You 'could' also remove 2 of the 3 RAM chips (U18 and U17)

[MüThing]

Yeah, but then that'd make an xp-all mod a lot harder, I'm guessing if all four slots are filled the system wont care and just use as much as it needs

not that I trust myself to do the xp-all mod, I'm a bedroom jammer anyway, if I want a different sound I'll probably just swap out the eeproms if I can get away with it

[Govmnt_Lacky]

Yeah, but then that'd make an xp-all mod a lot harder, I'm guessing if all four slots are filled the system wont care and just use as much as it needs

not that I trust myself to do the xp-all mod, I'm a bedroom jammer anyway, if I want a different sound I'll probably just swap out the eeproms if I can get away with it

Don't remove the sockets for U18 and U17. Just remove the RAM chips.

Of course, that is only if you have issues after you install the XP100 EEPROM. The XP100s only use the RAM chip in U19.

[MüThing]

but will it matter if the additional memory is in or will it just throw a fit and not work if I do that? course I havent bought the pedal or the stuff I need so I couldn't find out for myself


never mind, I just realised the xp-all has all four slots populated and that seems to work fine

[Rockmusikeren]

debugging help needed!!

I build the XP all and programmed the chip myself, I checked the ram chip's and they all seam to work fine.
The XP100 and the XP300 is working, but the XP200 and XP400 are not, they do not boot and the numbers
just look odd. I think maybe I did somethig wrong at the vero board, do anyone sell the PCB i've seen in this
thread?
Hope you can help me getting this one to work, it would be so nice to have all the xp in one pedal.

Big thanks to the developer! And off cause this forum

Cheers

[digi2t]

debugging help needed!!

I build the XP all and programmed the chip myself, I checked the ram chip's and they all seam to work fine.
The XP100 and the XP300 is working, but the XP200 and XP400 are not, they do not boot and the numbers
just look odd. I think maybe I did somethig wrong at the vero board, do anyone sell the PCB i've seen in this
thread?
Hope you can help me getting this one to work, it would be so nice to have all the xp in one pedal.

Big thanks to the developer! And off cause this forum

Cheers

The PCB for the EPROM's is located here;
https://oshpark.com/shared_projects/G6FmIKkl

Recheck your vero, and switching.

[Rockmusikeren]

Thank you so much for the link digi2t, I've ordered a set of pcb's ..

[Govmnt_Lacky]

Recheck your vero, and switching.

+1

Looks like your problem would be most likely with the switching of the A15 signal according to the way you are describing the problem.

Good Luck! 

[digi2t]

Thank you so much for the link digi2t, I've ordered a set of pcb's ..

You're welcome. The PCB is also mentioned (along with the link) on page 48 of the build doc. If it isn't, then you have an old version of the build doc. If this is the case, then it might also explain any problem you might have with the switching. That was a switching diagram problem discovered in an older build doc, and was addressed in a subsequent versions.

The most up to date version is here;

Part 1 - http://www.aronnelson.com/gallery/main.php?g2_view=core.DownloadItem&g2_itemId=51928

Part 2 - http://www.aronnelson.com/gallery/main.php?g2_view=core.DownloadItem&g2_itemId=51931

Sorry for having to split it up, but new Gallery limitations don't allow for a single file upload of this size.

[Rockmusikeren]

Recheck your vero, and switching.

+1

Looks like your problem would be most likely with the switching of the A15 signal according to the way you are describing the problem.

Good Luck! 

Thank you Govmnt_Lacky, I will check if I did anything wrong there..

[Rockmusikeren]

Thank you so much for the link digi2t, I've ordered a set of pcb's ..

You're welcome. The PCB is also mentioned (along with the link) on page 48 of the build doc. If it isn't, then you have an old version of the build doc. If this is the case, then it might also explain any problem you might have with the switching. That was a switching diagram problem discovered in an older build doc, and was addressed in a subsequent versions.

The most up to date version is here;

Part 1 - http://www.aronnelson.com/gallery/main.php?g2_view=core.DownloadItem&g2_itemId=51928

Part 2 - http://www.aronnelson.com/gallery/main.php?g2_view=core.DownloadItem&g2_itemId=51931

Sorry for having to split it up, but new Gallery limitations don't allow for a single file upload of this size.

Ohh digi2t, you got me there, I think I build it all after an old .pdf Thank you so much for the link's I will check the hole build right away..

[digi2t]

Old build doc? Yup, check the switching connections then. Page 56, in particular A14, A15, A16. You might have two of these connections backwards. That was the typo in the older documents.

[Rockmusikeren]

I found the fault, I missed a trace from r2 to pin 32, so now all the XP's are working, but the regulator is running hot and when the thing has been running for some time I can't do a calibration, I then have to let it be for some time without power and then I can do the calibration.

But I have a working unit, the rest I just have to figure out

Thanks for all your help digi2t and Govmnt_Lacky..

Cheers

[Gui113m]

Hi all,

Just bought an xp100, and I'm considering to mod it to XP300. I don't have a Programmer... Could someone of you sell me a programmed eprom? I live in Europe but I will pay for the chip, time consumed and shipping costs. Thanks!