CrAlt

You should be able to get the missing letters to show up looking at the matrix and jumping the correct pins on the keyboard socket with a little jumper wire. So quickly jumping 2 and 16 should make the O show up. The only other thing I could think to test would be to see if pins 1 and 2 on the keyboard connector are shorted to ground or together. The 2 switches are each separate circuits The keyboard missing letters are separate circuits. What do all of these non-connected things have in common? The PIA. PIA's do go bad. Maybe the PO plugged something funky in to the joystick ports that fried the PIA.

Mine does something like that also, when i hit FIRE some snow shows up on the TV.

1.02 works on my Mac now...COOL GAME!

Does anyone make NEW eprom writers? Like something that would work with USB or maybe even MacOSX or linux? I had one for a C64 "back in the day" but I sold it many moons ago.

It wont run on my 'puter... Stella 0.7/Mac It says illigal 6507 instructions "Bummer"