www.SwissMicros.com

My only thought is that's awesome. I've never done anything like replacing domes and would love to try or see a video on it. Glad it works.

If you haven't tried it yet, you might give flexing the keys a shot. Made a huge difference in all my keys, including the ENTER key.

https://www.youtube.com/watch?v=ZDxVxw6_SKU

So in my quick testing, it appears that the keyboard does prioritize left to right. So if I am still holding down a 7, 4, 1, 0, I can enter any of the other integers. However, if I hold down say, a 9, 6, 3, then I can't enter 7,8,4,5,1,2,0. My guess would be that when you're quickly entering a 1,5,0...

It's one of the benefits that the HP 42s by default had 25 storage registers (R00 -- R24). And you can resize it to be even larger if you like (up to 100 with direct addressing, more with indirect). This necessitates double digit register addresses. You can change the size of your storage registers ...

Mine is from Dec 2017 as well. I set the clock initially but then realized I really didn't care to see it displayed and haven't looked at it since. Currently about 6 minutes fast. It doesn't bother me. Not even sure why there needs to be a clock on the calculator. I'll use my calculator for calculat...

You've probably double-checked already, but is everything entered correctly? I entered what you had into the DM42 with 15 for A and 5 for B and pressing C resulted in 20 as expected.

The last one in the TalenPhilips collection is the one I was referring to. It's one of my favorite off-images.

Someone did post a nice version with the planet and the hitchhiker thumb and those words. I have it on my calculator but I don't remember who made it.

What if, for some reason, you wanted to assign a program to the second row and leave the first blank?

Perhaps I'm misunderstanding but would it be the same as with a regular matrix but just using a complex matrix? Create the empty matrix, press Enter to duplicate it, then press COMPLEX to create a complex matrix. Then fill in the matrix with the complex numbers? Create correctly sized matrix A, dupl...