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In addition to bug fixes, ''DOS 2.0S'' featured improved <code>NOTE/POINT</code> support and the ability to automatically run an Atari executable file named <code>AUTORUN.SYS</code>. Since user memory was erased when <code>DUP.SYS</code> was loaded, an option to create a <code>MEM.SAV</code> file was added. This stored user memory in a temporary file (<code>MEM.SAV</code>) and restored it after <code>DUP.SYS</code> was unloaded. The previous menu option from ''DOS 1.0'', <code>N. DEFINE DEVICE</code>, was replaced with <code>N. CREATE MEM.SAV</code> in ''DOS 2.0S''. |
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In addition to bug fixes, ''DOS 2.0S'' featured improved <code>NOTE/POINT</code> support and the ability to automatically run an Atari executable file named <code>AUTORUN.SYS</code>. Since user memory was erased when <code>DUP.SYS</code> was loaded, an option to create a <code>MEM.SAV</code> file was added. This stored user memory in a temporary file (<code>MEM.SAV</code>) and restored it after <code>DUP.SYS</code> was unloaded. The previous menu option from ''DOS 1.0'', <code>N. DEFINE DEVICE</code>, was replaced with <code>N. CREATE MEM.SAV</code> in ''DOS 2.0S''. |
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Version 2.0S was for [[Atari DOS#Disk Formats|single-density]] disks, 2.0D was for [[Atari DOS#Disk Formats|double-density]] disks. 2.0D was for the 815 Dual Disk Drive.
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Version 2.0S was for [[#Disk formats|single-density]] disks, 2.0D was for [[#Disk formats|double-density]] disks. 2.0D was for the 815 Dual Disk Drive.
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===DOS 3.0=== |
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===DOS 3.0=== |
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A new version of DOS that came bundled with the ''1050'' disk drives from Atari. This made use of the new [[Atari DOS#Disk Formats|''Enhanced Density'']] capability (referred to by Atari as ''Dual Density'') offered by the ''1050''.
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A new version of DOS that came bundled with the ''1050'' disk drives from Atari. This made use of the new [[#Disk formats|''Enhanced Density'']] capability (referred to by Atari as ''Dual Density'') offered by the ''1050''.
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By organizing [[Disk sector|sector]]s into blocks, Atari was anticipating larger capacity floppy disks, but this resulted in incompatibility with ''DOS 2.0S''. Files converted to DOS 3 could not be converted back to ''DOS 2.0''. As a result, DOS 3.0 was extremely unpopular and did not gain widespread acceptance amongst the Atari user community. Due to complaints and bugs, Atari released ''DOS 2.5'', which was actually released after DOS 3.0, in contravention of standard version naming practices. |
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By organizing [[Disk sector|sector]]s into blocks, Atari was anticipating larger capacity floppy disks, but this resulted in incompatibility with ''DOS 2.0S''. Files converted to DOS 3 could not be converted back to ''DOS 2.0''. As a result, DOS 3.0 was extremely unpopular and did not gain widespread acceptance amongst the Atari user community. Due to complaints and bugs, Atari released ''DOS 2.5'', which was actually released after DOS 3.0, in contravention of standard version naming practices. |
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===DOS XE=== |
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===DOS XE=== |
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:Codename during production: ''ADOS'' |
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:Codename during production: ''ADOS'' |
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When the Atari ''XF551'' drive came out, not only was it Atari's first drive that could read [[Atari DOS#Disk Formats|double-density]] disks, it was also double-sided. So support was added in the DOS for double-density and [[Atari DOS#Disk Formats|double-sided]] disks.
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When the Atari ''XF551'' drive came out, not only was it Atari's first drive that could read [[#Disk formats|double-density]] disks, it was also double-sided. So support was added in the DOS for double-density and [[#Disk formats|double-sided]] disks.
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A new proprietary file format made ''DOS XE'' incompatible with ''DOS 2.0S'' or ''DOS 2.5''. A separate utility was needed for reading older 2.0 files. |
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A new proprietary file format made ''DOS XE'' incompatible with ''DOS 2.0S'' or ''DOS 2.5''. A separate utility was needed for reading older 2.0 files. |
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===SmartDOS=== |
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===SmartDOS=== |
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Menu driven DOS that was compatible with DOS 2.0. Among the first third-party DOS programs to support [[Atari DOS#Disk Formats|double-density]] drives.
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Menu driven DOS that was compatible with DOS 2.0. Among the first third-party DOS programs to support [[#Disk formats|double-density]] drives.
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Many enhancements including sector copying and verifying, speed checking, turning on/off file verifying and drive reconfiguration. |
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Many enhancements including sector copying and verifying, speed checking, turning on/off file verifying and drive reconfiguration. |
