: That RAM wouldn't happen to be in 2114s, would it? If so, I'd suspect : those early on, I've had more trouble with 2114s than with any other : chip. I've lost count of the number I've replaced (certainly the RAM in : my Commodore 8050, the video RAM in my TRS-80 Model 3, the RAM in my : HP82163 (HPIL video interface)...) : -tony Yep, the RAM is 2114! I swapped the zero page RAM with others in several configurations. Out of 8 RAM how many would you suspect as bad? Could it be all 8, or a significant number such that getting just the right 2 for zero page wold be difficult, maybe I should buy at least a couple just to hope I get 2 good ones to try?! Thanks, AndyD