Willem Pcb50b Software Download

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1: Introduction

Oct 9, 2010 - I've downloaded and installed the Willem Programmer software, the. I have tried this method with my sivava willem PCB50B and work like a. New Willem programmer software 0.98d12, original by mpu51_avr. Thanks to author! Test+Verify chip.


EPROM chips are definitely a thing of the past and may even look like exotic devices to hobbyists and enthusiasts of old computers and synthesizers. A chip with a window so that you can see what is inside? Amazing !! Why don't they make them like this today?
Everyone that has used one knows that the little circular window is there out of necessity, not because it makes the chip look cool. Erasable Programmable Read Only Memories (EPROMs) can be written and erased but that is not as easy as it sounds. We must use light to erase them, UV light to be exact. I won't get into the physics of it, you can find the details online if you care to educate yourself. In a similar way you cannot simply plug them in the end product and program them as we do today with modern read-only memory chips, by flashing them. You need a programmer to do that.
SoftwareOver the years we have occasionally discussed on this forum as well as on ex5tech.com about EPROM programmers and their use in maintaining and/or upgrading older equipment. There are many options out there, some cheap and some very expensive. All require software to operate and each complete package follows the old quote 'you get what you pay for' very closely.

Willem Programmer Pcb50b Software Download


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A few years ago I decided to buy a programmer in order to make back-ups of the EPROM chips found inside some high-end Yamaha products. I had heard that as time went by those chips could partially erase themselves. I never had one fail but that did not stop me from thinking, what if? Upon checking what chips Yamaha had used and what was available on the market at the time, I decided to buy a cheap Willem EPROM programmer that requires a parallel port to be available in the host computer. There were some USB interfaced programmers in the market but none could offer (for a low purchase price) the ability to program 42-pin chips, the 27C800, used in the EX-series and some Yamaha samplers.
I did preliminary tests with that programmer and some chips under WinXP and everything appeared to be working but I never tried to program anything and check the result. Recently I went through those advanced tests on a Win7 machine and I was hit with a rather unpleasant surprise. Eventually I recovered but not before some additional money had been spent, a lot of time had been wasted and a great deal of frustration had been met with. When everything was over I thought that it could perhaps be of some help to other members of the forum to have a reference and avoid going through the same frustrating situation.

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I'll discuss my adventures in four parts. First the UV erasers, second the programmers, third the required software and last the actual process of programming. I hope that you will find all this useful if you have never used a programmer before. I also hope that you will share your experiences with your other kind of programmers. That is why the thread title ends with 'and maybe others?', because your contributions are welcome. I only ask that you are very specific as far as model number, interface, software version and chip maker goes. All this can be of great help to beginners as well as advanced users.