thoughts on Digitech Space Station eprom copying?

[DJGlukBH]

Just got my XP100 mod to XP300! Thanks to digi2t for the firmare file. Will try other versions for sure.

The mod went pretty easy - I bought RAM, Flash IC's and HC574 on Ebay. Got the flash flashed by my friend who has an old ultraviolet stuff of IC's.
Also my XP100 was a bit broken - I've traced the audiopath to U5, half of it was fried so I've got it replaced too.

XP-300 is just sick! So many wierd sounds! Gotta flash XP-200 and XP-400 firmwares too!

[Govmnt_Lacky]

Another satisfied customer!     

I love it!

[digi2t]

Still waiting on my perfboard for the 27C1001 mod. Got everything else though. Switch, relay, IC and what not. Once I get the perf, I can make my adapter, and start getting down to business.

Stay tuned. Hopefully we can take this puppy to the next level.

[lucidgenius]

Hey Guys,

Long time lurker, but first time posting...

I think the space station is the ultimate guitar effect.  Anyone consider making a clone of it?

[Govmnt_Lacky]

Hey Guys,

Long time lurker, but first time posting...

I think the space station is the ultimate guitar effect.  Anyone consider making a clone of it?

Have you read this thread at all? 

Essentially, that is what we are doing. Although not in the conventional sense 

[digi2t]

Hey Guys,

Long time lurker, but first time posting...

I think the space station is the ultimate guitar effect.  Anyone consider making a clone of it?

Financially, it`s not viable to clone it from scratch. In the end it`s cheaper to scour the net for a cheap 100, 200, or 400, and mod that. Besides, why have just the 300, when you can have an XP-ALL!!!
yes... the XP-ALL!!!
It Whammates. It Modulates. It Space-Stationates. It Reverberates. It does it
ALL!!!
It`s the
XP-ALL!!!
Oh... did I mention that it does it all?

OK, enough of me being a sh*t for one day.

[lucidgenius]

   Yes, I've read the whole thread.  I get that it's cheaper to mod and doesn't make sense to build from scratch.

Just curious if anyone was planning on recreating or cloning the space station.  Doesn't seem that Digitech is going to anytime soon.

[digi2t]

  Yes, I've read the whole thread.  I get that it's cheaper to mod and doesn't make sense to build from scratch.

Just curious if anyone was planning on recreating or cloning the space station.  Doesn't seem that Digitech is going to anytime soon.

They did use a bit of the Space Station in the EX-7, but just the tamer stuff (synth swell, I think). As for the reverse delay stuff, there are other pedals out there that do it as well, but I don`t know if you can control the speed of it like the SS. Maybe the Time Factor with a MIDI pedal. Everything else the SS can do was scattered into other units (2101, GNX, etc.).

Now, will they build it again? Who the hell knows. Some effects seem to suffer from «flavor-of-the-monthitis». This, along with the 200, and 400 was one of them. Tom Morello (amoung many others) kind of garanteed the continuation of the Whammy, in all it`s incarnations. After all, why have some pedal that isn`t being used by some sooper-booper rock star on your pedal board, right? 

Clone the SS? I`ll echo my brother Govmnt_Lacky; that`s what we did. We just didn`t have to reinvent the entire wheel, just retread the sucker.

As the Aussies say, "Work smarter, not harder".

Sounds way cooler with an Aussie accent.

[lucidgenius]

Thanks guys.

[fendrix_81]

just a question,
when i connect my gutiar to the xp100, even if it is in bypass mode, it cuts the bass frequencies or modificin my guitar tone.
Has anyone noticed this?

[digi2t]

just a question,
when i connect my gutiar to the xp100, even if it is in bypass mode, it cuts the bass frequencies or modificin my guitar tone.
Has anyone noticed this?

The XP series is not true bypass. It may, or may not, affect your tone, depending on your setup. If you find that it is sucking your tone too much, then I recommend that you run it in a loop.

[tuckster]

Lol did you guys check out the XP pedals with all rom versions for ~$400? That's hilarious... Two of them are in there right now.

[digi2t]

Lol did you guys check out the XP pedals with all rom versions for ~$400? That's hilarious... Two of them are in there right now.

Better to burn, than get burned. 

[fendrix_81]

i need help,
a friend of mine has a digitech xp 100 with which he wants to change into a xp 100 all.

When I opened it, I saw that it is a model that has already installed  the SMD 74hc574d and uses an eprom with the program of the XP100.
and i conclude that the memory of the program lies in the eprom and not in any IC of pcb.
Now, if we make the change, we need to install the eprom 3 XP200 300 and 400, but the memory of the XP100 resides in some integrated of pcb or only on eprom that I found inside?

by the way, to next the smd 74hc574d ther is an IC that is not digitech, but is Taiwan

thx friends.

[digi2t]

i need help,
a friend of mine has a digitech xp 100 with which he wants to change into a xp 100 all.

When I opened it, I saw that it is a model that has already installed  the SMD 74hc574d and uses an eprom with the program of the XP100.
and i conclude that the memory of the program lies in the eprom and not in any IC of pcb.
Now, if we make the change, we need to install the eprom 3 XP200 300 and 400, but the memory of the XP100 resides in some integrated of pcb or only on eprom that I found inside?

by the way, to next the smd 74hc574d ther is an IC that is not digitech, but is Taiwan

thx friends.

OK, your friend has an earlier model, using the 27C256 to carry the XP-100 program. In this case, for an XP-ALL conversion, you'll need to stack 4 EPROM's instead of 3. The fourth EPROM carries the 100 code. You can stack 4 EPROM's, but without the sockets. You can socket the bottom EPROM, but you will have to solder all the EPROM's together. The wiring will be slightly different as well, since you will not be calling for any "internal" (onboard) memory, all memory will be considered "external" (EPROM). You can use the XP-ALL build document, but you'll have to modify the wiring section to include the fourth EPROM.

I've presently started to assemble an XP-ALL+ conversion adapter board. This will adapt a 32 pin 27C1001 EPROM to the 28 pin EPROM space found on the XP board. The 27C1001 chip has a memory large enough to hold all four programs, in four banks. I advise you to wait before attempting to convert your friend's XP. Let me make and test my adapter first. If it works as I hope, it will make the conversion easier, only requiring 1 EPROM. I should have conclusive results by the end of next week.

Cheers,
Dino

[Govmnt_Lacky]

@Dino

Don't forget about us PCB etchers when you perfect your conversion board 

[LaceSensor]

Love all the work that has been done here.
I was fortunate enough to get a guy to do a conversion of an XP-100 to his version of the "all" for an absolute song, meaning my prized XP-300 can sit in storage safe and sound.

Awesome that you dudes have figured out how to do the patch switching without power-cycling, the jetpacks xp1000 misses that (luckily mine has it )

[digi2t]

@Dino

Don't forget about us PCB etchers when you perfect your conversion board  

I'm using special double sided perf board, that uses thru-hole pads instead of simple pads.. Since I'm using header pins on one side, and a 32 pin socket on the other, the thru hole pads allow me the luxury of joining pads by soldering between them on whichever side is more convienent.

I'm no expert on etching, but without thru hole pads, I'm not sure how a single, or even double, sided etch would work. I'll leave that to the etching brainiacs.

I'm drawing the layout in DIYLC right now, and I've taken photos of the process as well. I'll post the works when I've validated it all.

EDIT:
Here are some shots of what I have so far for the 27C1001 adapter board. The header pins on the underside of the board can ultimately plug into the exiisting 27C256 socket, or may be directly soldered into the XP main board. If the latter approach is chosen, then the relay should be socketed, to allow for easy removal if ever it fails. Otherwise, it's removal would require desoldering the adapter board from the main board.

Adapter board without XP-100 stereo relay;



With the XP-100 mode stereo relay;



and with the components moved out of the way, for a better view of the pad joints and jumpers;



Here's a mock-up view of the adapter (board will be trimmed to size after the work is done);





The switch that I'm planning on using is the ALPS SRRN243, 6P4T;



This switch not only provides enough contacts for program switching and power on reseting, but will also operate my relay to regain the stereo function in XP-100 mode, as well as adding four 3mm LED's for mode indication (ultra-bonus!!). The best part is that it's non-shorting (break before make), which will work with the reset function, and is small enough to fit easily into the restricted space of the XP housing. As a matter of fact, it's smaller than the Alpha rotary switch that we spec in the XP-ALL build. A real work of art.

[Dingus]

Dino, you're a damn genius!

I'm amazed by all of the great work you guys have done on this.

[Govmnt_Lacky]

You guys = Dino