I used to own an Atari computer store back in the day. I was/am still a technician as well. I've been out of the Atari scene for nearly 12 years. I recently came upon a Mega ST2 and decided to upgrade it to a Mega ST4. I used to do this mod every day, but I've forgotten a few things and I no longer have the documentation or schematics. I've soldered the RAM sockets in and have found the chips and installed them. I know I'm missing something as the Mega still shows only 2MB RAM. I seem to remember there's a resistor or three I need to clip, but don't remember which one or where it is...
My question is do you know of detailed procedure I might be able to download? I've searched the Internet in vain. Thanks.
Mega ST2 to ST4 RAM Upgrade new
