daver2
10k Member
It sounds like we are good then.
Remove Nivag's board first (leaving PETTESTER in UD9) and put the CPU back in the socket.
Give the PET a check again with PETTESTER (making sure the checksums still agree with your photograph and the DRAM test is still OK).
If so, pop the Kernal ROM into UD9 in place of the 4K PETTESTER and play a few games of space invaders!
EDIT: We didn't tell you to remove Nivag's board did we?! This means, at some point, you made TWO changes to the configuration not ONE... Remember what I said?
Dave
Remove Nivag's board first (leaving PETTESTER in UD9) and put the CPU back in the socket.
Give the PET a check again with PETTESTER (making sure the checksums still agree with your photograph and the DRAM test is still OK).
If so, pop the Kernal ROM into UD9 in place of the 4K PETTESTER and play a few games of space invaders!
EDIT: We didn't tell you to remove Nivag's board did we?! This means, at some point, you made TWO changes to the configuration not ONE... Remember what I said?
Dave