The MOS Technology 6507 CPU is an 8-bit microprocessor based on the 6502 technology. Basically it is a 6502 packaged in a 28-pin DIP instead of a 40-pin. This made the chip cheaper to package and integrate in systems. MOS technology achieved this by reducing the address bus from 16 bits to 13 bits and removing a number of other pins used only for certain applications.

The 6507 is the main chip of the Atari-2600 family of consoles. The Chip was launched in 1975 and could, due to the reduced number of address pins, address 8KByte of memory. This proved to be enough for the Atari consoles and for peripherals such as the 850 Serial & Parallel Interface, the 1050 disk drives and more.

The Atari 2800 was the Japanese version of the Atari 2600. It was released in 1983, and was the first Japan specific release of a 2600 console, though the 2600 was distributed before by companies like Epoch.

The Atari 2800 was released a short time after the Family Computer from Ninento (Famicom) but it did not do well in the Japanese market. Sears later took the Atari 2800 and distributed it in the US as the Sears Video Arcade II. It came with two controllers and the game "Space Invaders". There were about 30 games that were specifically branded for the Atari 2800, but the system was technically exactly the same as the Atari 2600.