6502 + at28c256 always reading wrong data

[1024MAK]

@ flyguybravo - glad that I could help. I hope you continue to enjoy learning about the 6502 and digital electronics.

Do keep us updated

Mark

[martin.mienczakowski]

Hello - I just wanted to post a thank you to the original poster and the replies - I had exactly the same issue, resolved through adding decoupling capacitors across the power lines close to the at28c256. Thank you!

[BigEd]

(Welcome! Nice to hear you too got an assist here. Thanks for letting us know.)