('''TOS''') was the Operating System of the Atari ST range of computers. This range included the 520ST, 1040ST and the F, FM and E variations (e.g.1040STE). Later, 32-bit machines ( TT , Falcon030 ) were developed using a new version of TOS, called MultiTOS , which was based on MiNT .
TOS combined Digital Research 's GEM GUI running on top of the DOS -like GEMDOS (which was based on CP/M -68K). Features included a Flat Memory Model , MS-DOS -compatible disk format, support for MIDI , and a variant of SCSI called ACSI (in later versions).
There is some difference of opinion over what the Acronym TOS stands for, the main candidates being "Tramiel Operating System" (named after Jack Tramiel , Atari's head at the time) or simply "The Operating System".
- Earliest version released on disk. First ROM release of TOS.
- --- Formats: 2 chip and 6 chip ROMS (192KB)
- --- Rom date: 20 Nov 1985
- --- Machines: 520ST, 1040ST
- fixed bugs, supported Blitter co-processor and real-time clock.
- --- Formats: 2 chip and 6 chip ROMS (192KB)
- --- Rom date: 22 Apr 1987
- --- Machines: 520ST, 1040ST, Mega 2, Mega 4
- Many bug fixes, file selector changed, DOS-compatible disk formatting, much improved performance. However, compatibility problems with older software.
- --- Formats: 2 chip and 6 chip ROMS (192KB)
- --- Rom date: 6 Apr 1989
- --- Machines: 520ST, 1040ST, Mega 2, Mega 4, Stacy
- Support for STe machines only. Needed STE_FIX.PRG to patch bugs.
- --- Formats: 2 chip ROMS (256KB)
- --- Rom date: n/a
- --- Machines: 520STE, 1040 STE
- bug fixes for the previous 1.06 STE TOS.
- --- Formats: 2 chip ROMS (256KB)
- --- Rom date: 1 Jan 1990
- --- Machines: 520STE, 1040 STE
- Early TOS release for Mega STE.
- Only found in the Mega STE with 720K floppy drive.
- --- Formats: 2 chip ROMS (256KB)
- --- Rom date: n/a
- --- Machines: Mega STE
- Bug fixes, 1.44MB disk support, memory test. Greatly enhanced GEM GUI. Last TOS version for ST/STE computers.
- --- Formats: 2 chip ROMS (256KB)
- --- Rom date: 14 Nov 1991
- --- Machines: 520ST, 1040ST, 520STE, 1040STE
- used in notebook ST.
- Primarily for 68030 TT support only.
- --- Formats: 4 chip ROMS
- (512KB) Update for Falcon 030 machines only.
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