The 520ST was the first available ST.
Its O.S. was not included in the ROMs in the first 520STs. TOS (standing
for: The Operating System) is based on CP/M 68K. After buying Atari, Jack
Tramiel needed a new computer quick. So he bought the license from Digital
Research for CP/M to have an O.S. . The last version of TOS, Multi TOS,
has not much in common with CP/M and is inspirated by UNIX. Over the TOS system,
GEM makes the ST easy-to-use.
The 520ST is still capable to run 90 percent of all Atari software (the missing
10 percent are STE, TT or Falcon specific programs). The TOS can be upgraded
to version 2.06 or MultiTOS.
An old 520ST can be updated to the following configuration:
CPU/Clock speed:68000/8 MHz - 16/32-Bit
RAM:512 (4 MB) KB
Resolution:640*400 2 colours
Sound:3 channel Mono (AY-3-8910)
Operating system:TOS 1.0
Languages:Basic, C, Pascal, ...
Interfaces:MIDI, RS232, 2*Joystick, Monitor, ROM-Port
Storage:Disk (3.5"" 720KB), Hard disk, CD-ROM
|(C) 2001-2014 by Matthias Jaap. Last update: 31/12/2014.|