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Atari announced a second variation of the 65XE, the 65XEM (for XE Music). This version featured a new powerful polyphonic sound chip called AMY with 8 independent sound voices and 64 oscillators. It was able to synthesize voice and any musical instrument sound much better than the Commodore 64 's SID chip. However, the AMY chip never reached production, so the 65XEM never passed the prototype stage either.



Image, description and specification taken with permission by
System unit Description
Processor MOS 6502C
Clock speed 1.79 MHz (NTSC) / 1.77 MHz (PAL)
RAM 64 KB
ROM 24 KB (16 KB for OS, 8 KB for Atari BASIC)
O.S. version(s) XE O.S.
Built-in software Self-Test, Atari BASIC Revision C
Colors 16 colors with 16 intensity level each
Sound 8 voices, 11 octaves (AMY chip)
Text modes Five text modes, max: 40 x 24, min: 20 x 12
Graphics modes 16 graphic modes, maximum: 320 x 192 pixels
Co-processor GTIA (video output, sprites), POKEY (sound, I/O), ANTIC (video, display lists), FREDDY (memory)
I/O ports Composite video output, Cartridge port (1 Adress space : 16 KB), Expansion port, SIO peripheral port (tape, disk, printer, modem), 2 x joystick connectors
Controller port(s) 2
Parallel Bus Interface Yes
Power supply External power supply unit - 1A, 5v cc
Keyboard Full-stroke keyboard, 57 keys, 5 function keys (Help, Start, Select, Option, Reset)

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