Atari 600XL, 800XL

I have four 800XL (two CIB) and three 600XL (two CIB) main units, five
power adapters, cassette drive XC12, program recorder 1010 (CIB), two touch
table (one CIB), Atari 1050 disk drive and many joystics.

type computer
country USA
year 1982
os Atari Basic
cpu MOS 6501C
speed 1.77MHz
ram 16KB (600) / 64KB (800)
rom 24KB
graphic 320 x 192
colors 256
sound 4 voices, 3.5 octaves
ports rf, cartridge, composite video output, peripheral port, parallel, two joystick

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The Atari 600XL and 800XL — The Definitive 8-bit Ataris

Released in 1983, the Atari 600XL and 800XL were Atari’s response to the failed 1200XL — corrected, improved, and far more successful versions of the company’s 8-bit computer line. The 600XL offered 16 KB of RAM in a compact chassis, while the 800XL provided a full 64 KB with BASIC built into ROM and a PBI (Parallel Bus Interface) expansion port for peripherals. The 800XL in particular became the definitive Atari 8-bit computer, selling strongly throughout the mid-1980s and earning a reputation as an excellent gaming and educational machine.

Correcting the 1200XL’s Mistakes

Where the 1200XL had removed BASIC from ROM and eliminated compatibility with much existing software, the XL series restored both. BASIC was back in ROM, the four controller ports returned (on the 800XL), and the PBI expansion bus was included for hardware add-ons. The XL series also refined the industrial design of the 1200XL — maintaining the modern aesthetic while addressing the practical shortcomings. The result was a machine that existing Atari users could upgrade to without losing their software investment.

The 800XL’s Software Library

By 1983, the Atari 8-bit platform had accumulated four years of software development, resulting in an impressive library of games, educational software, and productivity applications. The 800XL’s full compatibility with this library — combined with its capable custom chips, 64 KB of RAM, and BASIC in ROM — made it an attractive proposition for families seeking an affordable home computer with proven software support. Games like Pac-Man, Defender, Pitfall!, and dozens of original Atari titles were available, and the platform’s graphics and sound capabilities made it one of the best gaming computers of its era.