Digitech WH-1 - Anyone know the eprom chip models? + ROMs?

[mitchschaft]

I ordered that rotary after you posted this in January. It still hasn't arrived. He keeps saying wait two weeks. Lol

[MüThing]

It's been just a little while, things have come and gone that have made doing any more on this project not any easier, but I'm back on top of it now and I hope I'm on the home straight.

Mitch, I'm awfully sorry to hear the encoder didn't arrive in such a timely fashion, I hope you either got a refund from them without much trouble or they eventually got it to you and reimbursed you in some way or another.

As for dumping the PROMs, I've taken the time to build a proper 82S147 -> 2716 adapter board (as proper as my skills will allow) and take some new dumps of both 82S147 chips.




They show up just fine in my programmers software and are different from the dumps that I took back in 2017. I have all of the resources to build another pair of 2716 -> 82s147 boards, and am waiting to receive some more 2716 EPROMs as the ones that I tried months back seemed to be corrupted and wouldn't erase (their contents would change with every read I took, even when done seconds apart).

[mitchschaft]

I ended up reordering abd it showed up. Apparently the first order didn't go through and I wasn't even charged.

[Prehistoricman]

Would you upload your new ROM dumps? Thanks

[MüThing]

Would you upload your new ROM dumps? Thanks

Sure, I'd honestly forgotten to do this sooner: HERE!

Bear in mind they're still in the raw 2kb dump format due to being read as a 2716, but I imagine it'd be easy to trim the excess.

[AdrianM55]

Hi,
Any updates on your project? I'm having slight problems with my Whammy in terms of Bypass signal being mixed with original signal on Whammy mode. I don't know how to address it hence I found this thread being very informative.

Adrian

[mitchschaft]

I think the point was to dump the roms. Which he already did. That's as far as the project was supposed to go.

[swellsoundelectronics]

Do you know the firmware version of the eprom  for the .bin files you uploaded? I'm assuming it's V2, but I think I need V3.

Thanks,
Sam

Would you upload your new ROM dumps? Thanks

Sure, I'd honestly forgotten to do this sooner: HERE!

Bear in mind they're still in the raw 2kb dump format due to being read as a 2716, but I imagine it'd be easy to trim the excess.

[AdrianM55]

It's been just a little while, things have come and gone that have made doing any more on this project not any easier, but I'm back on top of it now and I hope I'm on the home straight.

Mitch, I'm awfully sorry to hear the encoder didn't arrive in such a timely fashion, I hope you either got a refund from them without much trouble or they eventually got it to you and reimbursed you in some way or another.

As for dumping the PROMs, I've taken the time to build a proper 82S147 -> 2716 adapter board (as proper as my skills will allow) and take some new dumps of both 82S147 chips.




They show up just fine in my programmers software and are different from the dumps that I took back in 2017. I have all of the resources to build another pair of 2716 -> 82s147 boards, and am waiting to receive some more 2716 EPROMs as the ones that I tried months back seemed to be corrupted and wouldn't erase (their contents would change with every read I took, even when done seconds apart).

Hey mate you've got any progress on these??

[MüThing]

Hey mate you've got any progress on these??

Funny you should ask..

I've gotten back into this project as of late and have a set of adapter PCBs designed and on my way here. One being a revised version of the TL866 adapter monstrosity you've already seen, and the other a (hopefully) fitted dual adapter to go to a pair of W27C512s. I also went and checked the continuity between my good and bad whammy rotary encoders and wrote up a pseudo truth table for them.

[MüThing]

I don't want to disappoint anyone but... it didnt work 








There's probably something else I'm missing but I'm not certain what it could be at this point. Just need some more time and patience and I'll get there. At least I'm confident these new roms are complete and functional, and I'm sure a pair of burnt 82S147 chips would be a fine solution in the end.

[AdrianM55]

I would say don't give up as you're closer than anyone so far holy grail is waiting.