The Atari 800XL

This is an update on the Atari 800, and the software is fully compatible according to Atari  below is a copy of the specification taken from the Atari magazine Input/Output:

Colour capabilities 16 colours and 16 intensities 256 shades.

Memory 64k RAM expandable to 128 K with memory expansion module. 24k ROM operating system including Atari BASIC programming language.

Sound 4 independent sound synthesizers. each with a 31/2 octave range.

Display 11 graphic modes 5 text modes up to 320x192 resolution. maximum text display 24 lines by 40 columns.

Special Atari Integrated circuits: GTIA for graphics display. POKEY for sound and controller ports.ANTIC for screen control and I/O

CPU 6502C microprocessor 0.56 micro-second cycle. 1.8 MHz

Extended Graphic Functions high resolution graphics, multi coloured character set. software screen switching, multiple redefined character sets player missile (sprite) graphics, fine screen scrolling. changeable colour registers, smooth character movement, simple colour animation facilities

Programming features Built in Atari BASIC programming language plus eight other languages, help key will provide additional information and menu screens. syntax checking on entry.

Input/Output external processor bus for expansion with memory and peripherals, 2 controller ports, serial I/O connector, monitor output.

Software over 1000 items of software available including self teaching programs with unique voice over. Educational. Home management. Programming aids. Atari user written programs (APX). and Atari's famous entertainment software.