XP-ALLin - the latest and greatest in the XP-ALL project.

[Prehistoricman]

So, with this code I no longer need to stuff the relay on the adapter pcb?

Correct. We have a wet/dry code in the works too!

Crazy idea, but is there any way to do the WH-1 code for the Whammy part instead of the XP version, I've got a 3/4 working one (white noise follows the notes, I think there may be some corruption going on) and there's just something about it that seems better than the others I've tried.  The whammy just doesn't suit my playing style, but after playing the WH-1 I could see using it.

The WH-1 runs on completely different hardware. To transfer the algorithm (with our current knowledge) would be impossible.
It's within the realm of possibility to run both in the same box and then use a controller/mod to switch to the WH-1 signal path.

Your issue with the WH-1 sounds like a bad connection to RAM.

[mitchschaft]

Hello.Is the wet/wet bin for the 27001 chip or just the wh100 rom that needs to be compiled with the rest?
How is the wet/dry coming along?

[Prehistoricman]

Hello.Is the wet/wet bin for the 27001 chip or just the wh100 rom that needs to be compiled with the rest?

Just for the XP-100. If you know how to use a hex editor, it's a very simple task to either stick the bins together or to replace the old XP-100 code (it's at the beginning of the combined file). Otherwise, I can do it for you.

How is the wet/dry coming along?

That's weird... I was convinced I had released it already.

I'll check out my bins and see if it's ready for release. I made the code modifications successfully, but there are a couple more steps before I can put it online.
At the time that I discovered wet/dry, I was basically hitting random buttons with regard to making the mod. I've since found out what most of the instructions do and now I'm more sure that it works and is stable.

[mitchschaft]

That's good to hear. Maybe I overlooked it. I just now got around to installing the XP-ALLin rom. I took a bit of a break the last year. Today I started looking into Diptrace to learn how to make a PCB that incorporates the PIC for the momentary switch so I can ditch the rotary and relay. I don't know if you guys have messed with that yet.

I found this flash eprom board on oshpark. I wonder if that guy got around to doing anything with it.

https://oshpark.com/shared_projects/MulhqGKj

[Prehistoricman]

XP100 modded dry/wet

https://www.aronnelson.com/DIYFiles/up/xp100_whammy_eprom_new_-_mod_%2B_drywet.txt

As before, it's a txt so you may need to rename that for whatever flashing tool you may use.

https://oshpark.com/shared_projects/MulhqGKj

Pretty cool. I considered doing something like this but by making a foray into the world of WiFi. I thought it would be neat to be able to flash the chip in my XP100 while sitting at my PC. The XP100 would power whatever networking chip it was (probably ESP8266). I was doing a lot of chip flashing back then (with my DIY programmer ) so it could have been worth it.

[lewsidiusmaximus]

Is there a step by step tutorial? Where do I get the parts/boards? Which ones should I use? Thanks

[digi2t]

Is there a step by step tutorial? Where do I get the parts/boards? Which ones should I use? Thanks

Chip burning service;
https://www.deadendfx.com/category/service

Code download, if you have your own burner (assembled for 27C1001 chip);
https://drive.google.com/open?id=1nwHOxD5Mulv5Ccg7hW1dxjgvDdsJVuAb

27C1001 adapter board;
https://www.deadendfx.com/product/xp-all-adapter-board

Build document;
https://drive.google.com/open?id=1aIbRsYi9-_odxECMjSIw4PFZCpxpx_GD

Sorry, apart from the adapter board, we don't supply parts.

[charmonder]

EDIT: oops I got it, the LED needs to be pointed off center to calibrate for some reason that works. nevermind!

[charmonder]

I just discovered the craziest thing , I'm reporting this on 2 different XP-ALL builds using codes titled:
xp400__reverberator_eprom_new.bin
Etc and it is loaded on an EPROM stack.

I have a batch of RAM that does not seem to be an outright failure,  until you try to use XP400 reverse reverb patches 40-48. in the time of 3 to 5 minutes it will shut down , reset becoming worse and worse each time until eventually it can not even run space station patches anymore. Plug in some different RAM from the same batch and the process starts all over again. It seems the RAM will behave perfect as long as avoiding the reverse reverb. It's a shame bc personally I think a few of those patches are definitely highlights for the xp400 category. I don't believe it could be any other problem than the RAM because patches do load and sound correct for a period of time and it won't crash until you've been playing for a few minutes.

Anyways I wonder does anyone have a for sure source for good RAM? It seems the ones labelled NEC JAPAN are no good. Does old RAM like this go bad over time? 

Thanks for any help!

[Govmnt_Lacky]

I just discovered the craziest thing , I'm reporting this on 2 different XP-ALL builds using codes titled:
xp400__reverberator_eprom_new.bin
Etc and it is loaded on an EPROM stack.

I have a batch of RAM that does not seem to be an outright failure,  until you try to use XP400 reverse reverb patches 40-48. in the time of 3 to 5 minutes it will shut down , reset becoming worse and worse each time until eventually it can not even run space station patches anymore. Plug in some different RAM from the same batch and the process starts all over again. It seems the RAM will behave perfect as long as avoiding the reverse reverb. It's a shame bc personally I think a few of those patches are definitely highlights for the xp400 category. I don't believe it could be any other problem than the RAM because patches do load and sound correct for a period of time and it won't crash until you've been playing for a few minutes.

Anyways I wonder does anyone have a for sure source for good RAM? It seems the ones labelled NEC JAPAN are no good. Does old RAM like this go bad over time? 

Thanks for any help!

Is this problem happening on 2 separate builds? Separate boards??

[digi2t]

Interesting. I'll have a go with my build. I must admit, I rarely use the 400 patches. 100 and 200 patches get the most play, with the reverse tape setting on the 300.

[charmonder]

Is this problem happening on 2 separate builds? Separate boards??

Yes mine and one I'm doing for a band mate. I'm reporting those results on both a v1 XP100 and v2 (no internal boot) XP100. My explanation is total speculation, but I'm wondering if those particular patches use up so much memory that it reveals faults in otherwise passable RAM (?)

Interesting. I'll have a go with my build. I must admit, I rarely use the 400 patches. 100 and 200 patches get the most play, with the reverse tape setting on the 300.

Same, thats why I'm wondering if this might have always been a latent problem as I never bothered exploring the xp400 until recently.  patches#46 & 47 in particular are fun usable interesting sounds in my opinion, its 100% wet reverse with just enough time to play sensical leads. sadly those are the exact patches that are crashing my XPs and destroying my RAM

I've ordered some jameco RAM and I bought a real unaltered XP400 so I'll report some findings...

[charmonder]

oh no! New batch of RAM from a USA distributor, reverse reverb is crashing both pedals

NEC USA 100ns
NEC IRELAND 100ns

I'm wondering if all this RAM really is suspect, I don't see how it could be a problem with the actual code because it will load the patches for a good 15 minutes initially and then thats pretty much the last of it!

Something else I was thinking the tantalum caps that go with the RAM holders... maybe I should replace that 1 original cap that was already in the units?

[charmonder]

aha! I think I got it!

OK so first off it is entirely possible to sort out good and bad RAM. key patches are on XP300, the famous synth string patches and the warp delay patches. If your RAM is bad these will be varying degrees of noise. If you have good RAM there will be no extra noise. Listen closely to both channels. If there is just a faint detuned radio amount of noise you still have 1 bad RAM chip, keep subbing out chips 1 at a time and by process of elimination you should be able find a complete set of good RAM.

2ndly, I believe when you are using the undervolt sensor method of automatic reset, it is also important to keep the power supply very clean. I had my XP plugged directly to a non-standby switched amp. This will predictably trip the XP undervolt when I turn on or off the amp. I still can't explain why this only happens on certain reverb patches! It seems to be that simply keeping a buffer between the XP1000 and the amp prevents the possibility of accidentally crashing the XP. I should probably replace the large electrolytics in that amplifier!

[ouch_]

Hello. Is the wet/wet bin for the 27001 chip or just the wh100 rom that needs to be compiled with the rest?

Just for the XP-100. If you know how to use a hex editor, it's a very simple task to either stick the bins together or to replace the old XP-100 code (it's at the beginning of the combined file). Otherwise, I can do it for you.

Firstly, thank you Prehistoricman! amazing job!
please, do you have the "XP-ALLin" bin for 27c1001 with xp100 wet/wet?
thanks thanks

[Baran Ismen]

I wonder something about XP-100 (or any others)

Is it technically possible to convert these units into a True Bypass one?

[Govmnt_Lacky]

Is anyone still doing these mods? Haven't seen much traffic regarding this and I know that getting used XP units for a decent price (below $150-200) is not much of an option anymore.
Pretty sure the mod community single-handedly drove up the demand and pricing for second-hand XPs.

[Nanitendaio]

Hi peeps new here. Looks like all the links are down for the eprom code (404 errors). I'll probably be trying the stacked method on an XP100, so looking for the code for the other three models. Or maybe someone could point me to a seller of preprogrammed eproms? I'm in Ireland so importing/exporting could be a problem so I'm probably looking at doing it myself with a programmer.

Cheers.