Well, I solved my problems!

When I filled my EEPROM with just nop's, I was still measuring garbage on all the data and address lines (AKA "the high frequency oscillations").
I ruled out problems with the clock and power supply by using the ones I used for the breadboard test. I then ruled out the ...

Yes, this is certainly important. It's not a good sign that you were "measur[ing] high frequency oscillations between 0 and 5v on all the data lines and address lines." " :shock: " Indeed... I don't think that was caused by noise, maybe my ground probe was detached or something, although I find ...

Further developments:

I decided to investigate the unreliableness a bit more. I tried adding a schmitt trigger using a comparator after the signal generator to make sure I was giving a clean signal to the NOT buffer. That didn't seem to have any considerable effect. After that, I decided to measure ...

Thanks for your replies. I attached schematics for the breadboard computer.

I personally think that I did somehow damage the 6502, why would it otherwise get warm? Or is that normal?

In any case the goal now is to see if the chip can be made to work.
As I said, I have confirmed it does still ...

Hello,

I have recently been making a simple 6502 computer (RAM, ROM, VIA, ACIA) and have successfully got it up and running. I was building it on solderless breadboards for easier prototyping. In order to make it a bit more permanent and because of the bugginess of cheap breadboards, I decided to ...