www.logiccircuit.org

Just post your question here

It is actually supports 16 bits address which is 1 bit shorter for 128k indeed.
You can build bigger memory from 2 chunks of 64K.

Can you send me email? I'll try to help you.

You can try to uninstall your video driver and install it again. But when uninstalling please make sure the driver get removed.
Can you please explain your setup. Are running it on virtual machine? Do you have access to other computer where you can try to run it?

Yes, these symptoms are usually mean that graphics card driver does not working properly.
Try to update it and see if it helps.
Another thing is please make sure you have all the updates from Microsoft installed on this machine.

What probably is happening is you have a sub circuit where you have your RAM with persisting memory. If you happened to have multiple such sub circuits used in your main circuit than after the power goes off it will need to write multiple instances of memory to one RAM. This is impossible of course....

Yes it supports multiple RAMs and ROMs. If you have some problems please upload your circuit here or send it to me in email and I’ll have a look.

Cool.
What are you doing with source code? Are you extending it somehow?

Thanks for your ideas.
I'll think what I can do about them.

Sure, please share your circuit after you’ve done. I am eager to see it.