Among them were DOS ( as a booter ), Amiga 1000, Apple II, Atari 400 / 800, Atari 2600, Atari 5200, Atari XL, MSX, ZX Spectrum, Commodore 64, Dragon 32, ColecoVision, Intellivision, Sega SG-1000 and TRS-80 Color Computer.

Only XL / XE computers were supported, DOS XE did not work with the older 400 / 800 computers.

DOS XL provided a menu program in addition to the command line.

OSS did reissue OS / A + 4. 1 for a brief period when they decided not to modify DOS XL for double-sided disk support.

DOS XL was designed to replace OS / A +.

Due to lack of demand and Atari working on a new version of DOS, OSS decided to halt development of DOS XL 4 and reissue OS / A + version 4. 1.

Initially included with MAC / 65, it was later added to DOS XL.

* A User's Guide and Reference Manual for DOS XL 2. 30, 1983

A direct descendant of OS / A +, DOS XL provided additional features to Atari's equipped with floppy disk drives.

DOS XL was distributed on a flippy disk.

The manual for DOS XL was a subset of OS / A +.

DOS XL came in two versions, 2. 20 and 2. 30 ( 2. 20 users had to pay $ 20 to upgrade to 2. 30 ).

DOS XL originally sold for $ 30, but the price later increased to $ 39.

File writing verify was turned off in DOS XL.

Several Disk Drive manufacturers shipped DOS XL with their drives, including Trak, Percom, Astra, Indus, Amdek and Rana.

D-Duplicate Disk Q-Quit to DOS XL

END-Tells DOS XL to stop batch execution ( used in a batch file )

* In previous versions of DOS XL, if you initialized a disk from the menu, the disk would not boot unless the file MENU. COM was on the disk.

The patch for DOS XL 2. 30 to make it a 2. 30P:

Plans for DOS XL 4 were scrapped due to low demand and competition.

DOS XL, along with other OSS products, became part of ICD's catalog of Atari products in January 1988.

However, DOS XL was dropped in favor of ICD's SpartaDOS.

As Steve Wozniak, the creator of Integer BASIC and the only person who understood it well enough to add floating point features, was busy with the Disk II drive and controller and with Apple DOS, Apple turned to Microsoft, who was the BASIC vendor of choice after their success with Altair BASIC, and licensed a 10 KB assembly language version of BASIC dubbed " Applesoft.

The Apple II disk operating system, known simply as DOS, thus intercepted all input typed at the BASIC command prompt to determine whether it was a DOS command.

Similarly, all output was scrutinized for a Control-D character ( ASCII 4 ), which BASIC programs would send before seemingly PRINTing a disk command to get DOS's attention ( the disk commands would not really get PRINTed but were intercepted by DOS and prevented from making it to the screen output ).

Civilization was originally developed for DOS running on a PC.

The drive's built-in disk operating system was CBM DOS 2. 6.

Accordingly, when a disk was formatted or a disk error occurred, the unit would try to physically move the head 40 times in the direction of track zero ( although the 1541 DOS only used 35 tracks, the drive itself was a 40 track unit, so this ensured track zero would be reached no matter where the head was before ).

However, one track was reserved by DOS for directory and file allocation information ( so-called BAM, Block Allocation Map ).

The embedded OS in the 1571 was CBM DOS V3. 0 1571, an improvement over the 1541's V2. 6.

In some cases, the disk operating system component ( or even the operating system ) was known as DOS.

On the PC compatible platform, an entire family of operating systems was called DOS.

* The DOS operating system was the primary operating system for the Apple Computer's Apple II family of computers, from 1979 with the introduction of the floppy disk drive, until 1983 with the introduction of ProDOS ; many people continued using it long after that date.

Usually, it was called Apple DOS to distinguish it from MS-DOS.

* Commodore DOS, which was used by 8-bit Commodore computers.

Unlike most other DOS systems, it was integrated into the disk drives, not loaded into the computer's own memory.

* Atari DOS, which was used by the Atari 8-bit family of computers.

The Atari OS only offered low-level disk-access, so an extra layer called DOS was booted off a floppy that offered higher level functions such as filesystems.

* The DOS / 360 initial / simple operating system for the IBM System / 360 family of mainframe computers ( it later became DOS / VSE, and was eventually just called VSE ).

Digital Research produced a compatible variant known as DR DOS, which was eventually taken over ( after a buyout of Digital Research ) by Novell, then by Caldera.

The game was made available on Steam on August 3, 2007, running on the DOSBox DOS emulator.

While a few short-lived DOS based EDuke projects emerged, it was not until the release of EDuke32, an extended version of Duke3D incorporating variants of both Fowler's Microsoft Windows JFDuke3D code and Saettler's EDuke code, by one of 3D Realms ' forum moderators in late 2004 that EDuke's scripting extensions received community focus.