I was playing with my Apple 1 yesterday when the reset began to fail. It has worked intermittently but now does not work at all. It displays the / but never does the carriage return. I installed my address and data bus display onto the expansion bus, ran in single step and found that the monitor gets as far as FFF7 and then instead of performing the RTS back to the keyboard monitor loop at FF1F, it continues to FFF8 and eventually loops around at FFFF. I have so far replaced the 6502, the 6820, the 8T97's and the ROMs to no avail. Do any of you have suggestions for fixing this? Kinda weird that so much code is correctly run before it fails.