First - I want to apologize for the tardiness of my reply back to this thread. It's been an incredibly busy week but I should have posted back sooner to acknowledge all of the great feedback I received from everyone. Thank you! You even pointed out a few issues I didn't realize I had yet!

Second ...

Lot of great replies, thank you!! Sorry for the image - I've attached an embedded image toward the bottom of this reply.

@dourish - I believe all any unused inputs are resolved. On my EEPROM, WE is tied high, OE low, CE is connected to a NAND gate output where both inputs are tied to the 65c02's ...

I've been struggling with this problem for 3 weeks now and have run out of ideas on how to troubleshoot this. Hoping someone here might be able to point me in the right direction.

I've got a WDC 65c02 paired with an AT28C256 EEPROM that I've programmed entirely with $ea as a means of testing. I'm ...