thoughts on Digitech Space Station eprom copying?

[mwynwood]

Thanks for the quick replies guys!
I think I'll wait for the documentation before I go any further... 

[digi2t]

Thanks for the quick replies guys!
I think I'll wait for the documentation before I go any further... 

http://www.aronnelson.com/gallery/main.php?g2_view=core.DownloadItem&g2_itemId=48006&g2_GALLERYSID=ac83e5003bcd2ddc4c381f3877637913

Troubleshooting thread, in connection to the document, has been started here in the DSP section of the forum.

Cheers,
Dino

[nochtanseenspecht]

this is fantastic work Dino! thanks a lot man
everybody go spacestation 

meanwhile i can report that a made  a simple cv input on my xp100, it works fine
so now i can control the pedal function by MIDI , wich is in my (studio)situation very welcome
if anyone's interested i can post a picture,but i guess you can figure out yourselves..
i've tried several LED's, and red seems to give the best results

[digi2t]

this is fantastic work Dino! thanks a lot man
everybody go spacestation 

meanwhile i can report that a made  a simple cv input on my xp100, it works fine
so now i can control the pedal function by MIDI , wich is in my (studio)situation very welcome
if anyone's interested i can post a picture,but i guess you can figure out yourselves..
i've tried several LED's, and red seems to give the best results

That's great news.

Please post pictures. Although some things can be "figured out", we always encourage an exchange of information, especially visual. You just never know, maybe you've done something a certain way, that may help out someone else down the line.

BTW, have you ever use boards from Highly Liquid for MIDI implementation? I've used their relay board for switching, quite nice. They have other kits as well.

Cheers,
Dino

[nochtanseenspecht]

hm i feel silly, but i can't figure how to attach a picture to this message..
but basically it is just a LED in front of the photocell, hooked to a female minijack chassisconnector.
the minijack is fed with CV from my syntecno teebee wich converts the MIDI signals from the sequencer.. autofootcontrol

Highly Liquid i haven't used so far, i was thinking to get a midi-trigger thing, for an old drumbox. it is nice that they exist

btw, i have another revision xp100 than in your documentation, the smd chip is allready there as well as the eprom socced
so thats lucky for me.. i will give it a try with only the extra RAM + tantalums. see if it works
i'm to lazy to do the stereo mod..maybe later on. is this a worthy contribution to the reversed delay effect ?

cheers, david

[digi2t]

hm i feel silly, but i can't figure how to attach a picture to this message..
but basically it is just a LED in front of the photocell, hooked to a female minijack chassisconnector.
the minijack is fed with CV from my syntecno teebee wich converts the MIDI signals from the sequencer.. autofootcontrol

Highly Liquid i haven't used so far, i was thinking to get a midi-trigger thing, for an old drumbox. it is nice that they exist

btw, i have another revision xp100 than in your documentation, the smd chip is allready there as well as the eprom socced
so thats lucky for me.. i will give it a try with only the extra RAM + tantalums. see if it works
i'm to lazy to do the stereo mod..maybe later on. is this a worthy contribution to the reversed delay effect ?

cheers, david

I`m really intrigued to see the guts of your XP-100. To place photos in your post, open an account with a photo server (Photobucket, Imageshack, etc.), and upload your pictures there. Once that is done, copy the address fo the picture on the server (example; http://i214.photobucket.com/albums/cc196/digi2t/Space%20Station/DSCF0748.jpg), and then paste it here, using the «insert image» button, found just above the reply text box. Clicking the button will give this;



Simply insert the picture address where I`ve placed the asterisk. Using the example address above, you get this;



Usually photo servers will give you several choices of address formats i.e. http, img, etc. If so, copy the «img» format, and the img prefix and suffix will already be attched to the photo address when you paste it here. That way you won`t even need to click the button above, simply paste the address.

Hope that helps.
Dino

[nochtanseenspecht]

Thanks for the explanation Dino,
i give it a try:

[digi2t]

Thanks for the pic David. I had never seen an early version of the board before. Yours uses the EPROM to hold the program, whereas the later version uses U10.

I'm assuming that there is one SRAM chip in the U19 slot? Picture is cut short on the bottom  .

Cheers,
Dino

[nochtanseenspecht]

indeed, one SRAM chip in the U19 slot.
i wait for the other RAM to arrive.
my xp-100 has serialnumber jp47dc-10003

[fendrix_81]

hi friends
i want to do this mod to a xp 100..
i have a question
i just need an programer "the eprom is virgen" (M27C256 UV EPROM 256K 32K x 8bit FDIP28) or i need also an eraser?
could be fine this programer?: http://www.ebay.es/itm/USB-Programmer-for-EPROM-27Cxxx-27c256-27c512-etc-/130646482173?pt=Attrezzature_e_strumentazione&hash=item1e6b231cfd

or maybe i have to look for another one? i use portatil and i have just an usb conector..

[Govmnt_Lacky]

Lucky dog! 

You already have the SMD chip soldered in there!!!

[pinkjimiphoton]

[fendrix_81]

did somebody have or had
noise on xp 100???
i have this problem...

[digi2t]

hi friends
i want to do this mod to a xp 100..
i have a question
i just need an programer "the eprom is virgen" (M27C256 UV EPROM 256K 32K x 8bit FDIP28) or i need also an eraser?
could be fine this programer?: http://www.ebay.es/itm/USB-Programmer-for-EPROM-27Cxxx-27c256-27c512-etc-/130646482173?pt=Attrezzature_e_strumentazione&hash=item1e6b231cfd

or maybe i have to look for another one? i use portatil and i have just an usb conector..

From what I can tell, the programmer should be fine. One thing you should verify is if the software/hardware allows you to program at different speeds. I found that some EPROM's don't like programming at high speeds, producing an unusable chip.

I HIGHLY recommend purchasing a UV eraser as well. A small eraser is not expensive. The reason for which I recommend the eraser is because how sure are you that the EPROM you are buying is "virgin"? What if the memory is blank, but corrupted? I always run my chip through the UV before programming, just to ensure that I don't have any surprises. Also, what if you chip gets corrupted (static electricity) between the programmer and the socket? That has happened to me. I had to erase, and reprogram. This is the eraser I am using;
http://www.ebay.ca/itm/Eprom-eraser-Ultraviolet-UV-Lamp-Light-once-eraser-6pcs-IC-/280900176187?pt=LH_DefaultDomain_0&hash=item4166f4893b

did somebody have or had
noise on xp 100???
i have this problem...

As for noise from you XP-100, could you please be more specific? What kind of noise? Are you using the proper power supply? More info please.

[Greenmachine]

Thanks Dino and GovmtLacky!!!

[digi2t]

Thanks Dino and GovmtLacky!!!

Very welcome! 

[pinkjimiphoton]

did somebody have or had
noise on xp 100???
i have this problem...

make sure your gain trimmer isn't too "hot"...it will make all kinds of weird, edge-of-distorting sounds happen. did you try turning the input gain down slightly?

can you post a clip of the noise(s) you're getting?

thanks!


dino and greg....

man...i love you guys...   

[fendrix_81]

hi
the pedal that im looking is of my friend,
he told me that the noise problem is like an " FFFFF " and not like an " HUM " as the power supply can give, but the noise is very little.
he will make me a soundclip,
and i will check what happend.

[fendrix_81]

and the power supply is original

[pinkjimiphoton]

still sounds to me like the input signal is too hot.