Released in 1983 as a replacement for the 800 and 1200XL, the 800XL is the
high-end version of the 600XL.  The 600XL/800XL include most of the features
of the 1200XL minus the Function keys and the demo program.  But both the
800XL and 600XL have the Atari BASIC language built-in.  In addition, these
two systems offer the Parallel Bus Interface (PBI), providing fast parallel
access to the heart of the computer.  The 800XL contains 64K RAM.

The 800XL was produced in both NTSC (North America) and PAL (Europe) versions:
  o  NTSC (North America), produced fall 1983 to summer 1984 by Atari, Inc.
     - Monitor port lacks the separate chroma video signal 
     - Normally boots with Atari BASIC (Revision B) enabled;
       Hold down [Option] on startup to boot without BASIC.

  o  PAL (Europe) version, produced fall 1983 to summer 1984 by Atari, Inc.
     - Monitor port lacks the separate chroma video signal 
     - Normally boots with Atari BASIC (Revision B) enabled;
       Hold down [Option] on startup to boot without BASIC.

  o  PAL (Europe) version, produced fall 1984 by Atari Corp.
     - "800XLF" motherboard with FREDDIE memory management chip
     - Monitor port does include the separate chroma video signal 
     - Normally boots with Atari BASIC (Revision C) enabled;
       Hold down [Option] on startup to boot without BASIC.

Rare variations of the 800XL:
  o  SECAM (France) version, fall 1984 by Atari Corp.
     - "SECAM ROSE" motherboard (based on 800XLF, including FREDDIE)
     - FGTIA (SECAM GTIA)
     - SCART monitor port instead of standard Monitor port
     - Normally boots with Atari BASIC (Revision C) enabled;
       Hold down [Option] on startup to boot without BASIC.

  o  Some late-distribution 800XLs were sold with 128K RAM.

5 different types of 600XL/800XL keyboards were nicely documented by Beetle
here: http://www.atariage.com/forums/index.php?showtopic=105170

The 800XL was made in Hong Kong and Taiwan.

Production of the 800XL was discontinued by 1985.

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