So I built my apple i, all was fine, I had run Uncle B's test program a number of times and all seemed fine. However I got a little excited and connected in both the ACI card and a PS/2 converter for the keybaord. When I booted back up I am only getting @'s, P's and 0's (I think the number not the letter). My guess is that the lower half of the byte is some how getting messed up but currently unable to find the problem. I will shortly provide some pictures but in the mean time:
All Voultages appear fine and no issues.
I have removed the lower half of the computer (the computer section) and it still produces the same issue (as seen from the flashing load screen).
I have swapped out all of the repeat chips on the board to check that none had gone.
While I dont totally discount a bad joint, I have checked checked and checked again all joints and also the board was working a number of times before even after being moved around a little.
I have checked and blown air over the whole board a number of times in case something fell on the board and shorted two parts.
Anyone had this problem and not talked about it? - I went back quite far in the forum for any monitor / char issues and couldnt find anything like this.