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Atari 520ST

Atari ST · 1985

Built in under a year by Tramiel's Atari to beat the Amiga to market, and it did: a 68000 with a GEM desktop for well under a thousand dollars in 1985. The MIDI ports fitted as standard are the historically important detail — they made the ST the standard studio sequencer machine for a decade, and Cubase and Notator were written for it. Earliest boards have external power bricks.

As catalogued

Maker
Atari
CPU
Motorola 68000-8
Memory
512K
Styles
520ST (TOS on disk), 520ST+ (1MB)
Regions
PAL, NTSC
Chassis
wedge, external floppy drive
OS
TOS 1.00 / GEM

Chips

6
CPU
Motorola MC68000-8, Signetics SCC68000
Shifter
C025912, C300589 (STE)
GLUE
C025913, combined in the STE's GST MCU
MMU
C025912-002, combined in the STE's GST MCU
Sound
Yamaha YM2149F
TOS ROM
TOS 1.00 (on disk), TOS 1.00, TOS 1.02

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