In 1984 I worked for a small company creating educational software for the Apple II, Atari 800/400, and (ugh) Commodore 64. One of our development machines was an old 800 labeled "Engineering Serial 26". It looked and acted pretty much like a standard 800 but a peek under the lid revealed bare RAM and ROM cards. Both ROM cards held EPROMs with paper stickers and three RAM cards totalled 36K. The OS card had an extra chip socket bolted to the back with wires flying down to the motherboard, so it