[continued from previous message]

- 720KiB 3.5"-Enhanced XF551 [DD 2880 sectors]
- 256KiB - 8MiB HardDrive/CF HDD [SD 2048 - 65535 sectors, 56-510 files]
- 512KiB - 16MiB HardDrive/CF HDD [DD 2048 - 65535 sectors, 56-510 files]
- Files on disks and small partitions with less than 1024 sectors can be read
by DOS 2/2.5/Clones.
- Files on larger disks/partitions can be read by DOS that support the
"no file-check" bit in the filename-status, like MyDOS.
- Only the first 64 files can be read by other compatible DOS versions, due
to incompatibility in the VTOC-sectors.
- A LiteDOS disk must not be written to with another DOS.
- Tools/programs that come with LiteDOS are:
1/ LiteINIT:
This tool will let you format and init a LiteDOS disk or partition.
2/ 850-style R:Driver (Lite850.DRV):
This program will detect and download/install the driver from the 850 or
compatible device.
3/ TinyTERM:
This is a small terminal program that let you talk to any R: device
present.
4/ Turbo Basic / Compiler / Runtime (XL/XE with 64k):
- Turbo-Basic 1.5 compiled to give the maximum amount of free RAM.
- Compiler, to compile your turbo basic to a runtime.
- Runtime, to run your compiled basic program.
5/ SIO2WiFi (ESPP6.DRV):
http://www.mr-atari.com/Mr.Atari/SIO2WiFi/
This program installs a R-Verter compatible handler to communicate with
device R:.
- The ESP8266 is a Wifi-module that can be used as modem to access
BBSes found on the Internet. See:
https://www.espressif.com/en/products/hardware/esp8266ex/overview
6/ RUNBAS.XEX:
This is a small machine code that runs the first file with the name
*.BAS it finds.
Available: http://www.mr-atari.com/Mr.Atari/LiteDOS/

------------------------------

Subject: 7.3.4) What other 3rd-party DOS versions were released for the Atari?

This section attempts to list all released 3rd-party "full-featured" DOS versions, beyond RealDOS, SpartaDOS X, and XDOS (which are described in
another section of this FAQ list).

This list is presented in chronological order by date of first (known)
release.

CP/A version 1.0 April 1981 (MC is still looking for a copy of this version) OS/A+ version 1.1 May 1981 (MC is still looking for a copy of this version)
OSS OS/A+ - ATARI version 1.2 Copyright (C) 1981 OSS
OSS OS/A+ - ATARI version 1.2e Copyright (C) 1981 OSS
OSS OS/A+ - ATARI version 2.00 Copyright (C) 1982 OSS,Inc.
OSS OS/A+ - ATARI version 2.10 Copyright (C) 1982 OSS,Inc.
OSS DOS XL - ATARI version 2.20 Copyright (C) 1983 OSS,Inc.
OSS DOS XL - ATARI version 2.30 Copyright (C) 1983 OSS,Inc.
OSS DOS XL - ATARI version 2.30C Copyright (C) 1983 OSS,Inc.
OSS DOS XL - ATARI version 2.30X Copyright (C) 1983 OSS,Inc.
OSS DOS XL Atari v2.30 Axlon RamDisk Copyright (C) 1984 OSS,Inc.
OSS DOS XL Atari v2.30C Axlon RamDisk Copyright (C) 1984 OSS,Inc.
OSS DOS XL Atari v2.30 Mosaic RamDisk Copyright (C) 1984 OSS,Inc.
OSS DOS XL Atari v2.30C Mosaic RamDisk Copyright (C) 1984 OSS,Inc.
FTe DOS XL - ATARI version 2.30 Copyright (C) 1994 by FTe
FTe DOS XL - ATARI version 2.30C Copyright (C) 1994 by FTe
FTe DOS XL - ATARI version 2.30X Copyright (C) 1994 by FTe ---------------------------------
- Developed by Optimized Systems Software (OSS), successor to Shepardson
Microsystems, Inc. (SMI), developer of Atari DOS I and the File Manager
System of Atari DOS II.
- Introduced April 3-5, 1981 at the West Coast Computer Faire as: "CP/A"
- Original version of the Console Processor and the original version
("version 2") of the File Management Subsystem (FMS; identical with that of
Atari DOS 2.0S) were written by Paul Laughton. Other portions primarily by
Mark Rose, with collaboration of Bill Wilkinson and Mike Peters.
- Command line driven, with optional menu available
- Version 1
- Disk drive type supported: Atari 810 (& compatible)
- Disk allocation/filesystem: Atari DOS 2.0 Single Density
- Version 2
- Disk drive types supported:
1) Atari 810 (& compatible)
2) SSDD 5.25" Single-Sided, Double Density
- Disk allocation/filesystems:
1) Atari DOS 2.0 Single Density
2) "Atari DOS 2.0 Double Density"
- Format developed with Atari for the Atari 815
- 256 total bytes/sector, with 3 bytes of each sector used to
address the next sector.
- 40 tracks * 18 sectors/track = 720 total sectors, with 13
sectors used for software control or unused by the FMS.
- Data capacity per diskette:
707 sectors x 253 bytes/sector = 178,871 bytes/disk
- 13 special sectors:
1-3 Boot sectors, containing the boot record accessed by the
Atari OS at system power-up. (OS reads 128 bytes/sector)
360 Volume Table of Contents (sector usage)
361-368 File Directory
720 unused by the FMS (same as Atari DOS I and 2.0S)
- Maximum of 64 files per diskette (8-sector File Directory)
- Supports any mixture of up to 8 single and/or double density disk drives
- No smart density switching. Drive 1 acquires the density of the booted
master disk. DOS XL automatically asks each drive what density it is
during the boot process. From then on, may use the CONFIG command to
manually change a disk drive's density.
- STARTUP.EXC batch file of DOS XL commands (ATASCII text) runs at system
boot (after AUTORUN.SYS)
- RS232.COM provided for loading the R: handler from the 850 interface ROM
- RS232FIX.COM provided as a debugged alternative to the R: handler
contained in the ROM of the Atari 850 interface.
- Version 2.20 can save 5KiB of user RAM by occupying memory which is bank-
switched with an OSS SuperCartridge, via DOSXL.SYS
- Version 2.30C is Version 2.30 with DOSXL.SUP enabled as DOSXL.SYS, which
saves 5KiB of user RAM by occupying memory which is bank-switched with an
OSS SuperCartridge
- Version 2.30X is Version 2.30 with DOSXL.XL enabled as DOSXL.SYS, which
saves 3KiB of user RAM by occupying memory available under the Atari OS
(requires an XL/XE computer with at least 64KiB RAM).
- BitWedge (BIT3.COM) Version 1.1 - 20DEC83
Copyright (c) 1983 by Harald E. Striepe
- Provided by OSS for use with the Bit 3 Full-View 80 on the Atari 800.
- For use under DOS XL Version 2.30 and up
- v2.30 Axlon RamDisk. Version by Harald E. Striepe and OSS.
- Same as Version 2.30 but with RAM drive support for Axlon banked
memory. 883 single density sectors.
- v2.30C Axlon RamDisk. Version by Harald E. Striepe and OSS.
- Same as v2.30 Axlon RamDisk version but with DOSXL.SUP enabled as
DOSXL.SYS, which saves 5KiB of user RAM by occupying memory which is
bank-switched with an OSS SuperCartridge.
- v2.30 Mosaic RamDisk. Version by Harald E. Striepe and OSS.
- Same as Version 2.30 but with RAM drive support for Mosaic banked
memory. From 371 sectors (one Mosaic 64K RAM Select board plus 32KiB
of standard RAM) to 896 sectors (two 64K RAM Select boards plus a
32KiB board).
- v2.30C Mosaic RamDisk. Version by Harald E. Striepe and OSS.
- Same as v2.30 Mosaic RamDisk version but with DOSXL.SUP enabled as
DOSXL.SYS, which saves 5KiB of user RAM by occupying memory which is
bank-switched with an OSS SuperCartridge.
- Version 2.30p is a patched Version 2.30 that fixes two bugs:
1) A boot disk created from the DOS XL menu couldn't boot unless the
MENU.COM file was the disk.
2) A boot disk initialized in a drive other than 1 would always boot
up with that drive number as the working drive at the initial
command line prompt.
- OSS published a patch to convert version 2.30 to version 2.30p in
their Spring 1984 Newsletter. OSS then published a corrected version
of the 2.30p patch in their Fall 1986 Newsletter. See:
http://preview.tinyurl.com/o6cn9mm
- OSS/Indus DOS XL 2.35I is OSS DOS XL 2.30 plus GTSYNC.COM, the
Indus GT Synchromesh Engager. Copyright (C)(P) 1984, Indus Systems.
Released by Indus Systems in 1984:
- OSS DOS XL - ATARI version 2.35I1 Copyright (C) 1983 OSS,Inc.
- GTSYNC.COM VID: 01.02\01.01\01.01\01.21\01.21.
- Supports Synchromesh 38.4 kbit/s on:
Indus GT, LDW Super 2000, CA-2001
Released by Future Systems in 1986:
- OSS DOS XL - ATARI version 2.35I2 Copyright (C) 1983 OSS,Inc.
- GTSYNC.COM VID: 01.10\01.01\01.10\01.30\01.30.
- Supports Synchromesh II 68.2 kbit/s on:
Indus GT, LDW Super 2000, XFD601, XFD602
- DOS XL 2.35I1 and DOS 2.35I2 were often (always?) distributed with
RAM130.COM, written by Joseph Segura in 1985: a 64KiB RAM drive for
130XE banked memory. Synchromesh (GTSYNC.COM) must be disabled in
order to use RAM130 -- effectively, RAM130 is for DOS XL 2.30.
- "DOS XL 2.35L" is described in the manuals for the LDW Super 2000 and
CA-2001 disk drives. However, original disks shipped with these drives
are reported to be identical to DOS XL 2.35I1 (including RAM130.COM).
- Warp Speed DOS XL, including under cartridge, under ROM, and Axlon
banked memory versions, was distributed by Happy Computers, Inc. for use
with Happy 810 Enhancement (Rev 7 capable units) or Happy 1050
Enhancement
- Shipped with: Amdek AMDC-II, Astra 1620, CA-2001, Concorde C-221M,
Indus GT, LDW Super 2000, NCT 810 Turbo (1983 units), Percom AT88-S1,
Percom AT88-S2, BASIC A+, MAC/65
- Rights purchased from OSS by ICD in January 1988
(but ICD discontinued DOS XL in favor of their own SpartaDOS)
- Rights purchased from ICD by Fine Tooned Engineering (FTe) in 1993
- FTe DOS XL 2.30 (including 2.30C and 2.30X) released on 6/22/94.
They are identical to the OSS releases of the same versions.

K-DOS By K-Byte Copyright 1981 Kay Enterprises Co. ---------------------------------------------------
- By Kay Enterprises Co. (John Mathies, K-Byte general manager)
(the makers of K-Razy Shoot-Out and K-Razy Kritters)
- Disk drive types supported: Atari 810 (& compatible)
- Disk allocation/filesystem: Atari DOS 2.0 Single Density
- Command line driven
- Memory resident

OS/A+ version 4.0 (1982 - MC is still looking for a copy of this version)
OSS OS/A+ - ATARI version 4.10 Copyright (C) 1982 OSS --------------------------------
- Port of Apple DOS for the Apple II (which was developed by Paul Laughton for
Shepardson Microsystems, Inc. (SMI), predecessor to OSS)
- Requires, and runs on, only double density or larger disk drives
- Disk allocation/filesystem:
- Mapped file structure (true random access to data files)
- Physical sectors of either 256 or 512 bytes
- Disks with 128 bytes per sector would use pairs of sectors to emulate
256 byte sectors
- Sectors are grouped into blocks of n sectors in length, where n is a power
of two between 1 and 128
- Files are at least one block in length, and up to 16MiB long
- Maximum number of files per disk depends on the disk capacity. For a
single-sided, double density (180KiB) disk the maximum is 105 files.
- Disk drives ranging in storage size from 128kB to over 15MB
- Interoperability with OS/A+ version 2:
- ADOS command allows the user to access version 4 disks as Dn: while
accessing version 2 disks as An:.
- COPY24 command can copy version 2 files to version 4 diskettes, or vice
versa.
- Shipped with: Percom RDF40-S1 (later units), Percom RFD44-S1 (later units),
Percom RFD40-S2, Percom RFD 44-S2, Percom AT88-S1PD, Percom AT88-SPD,
Percom Doubler, NCT 810 Turbo (1983 units)
- Also sold by Software Publishers/SWP for use with ATR8000, 1982-1983

DOS-MOD (1983)
(c) 1984 R.K.Bennett TOP-DOS v1.1
(c) 1984 R.K.Bennett TOP-DOS v1.20
TOP-DOS 1.4 (1984)
TOP-DOS 1.5 (c) 1985 R.K.Bennett
TOP-DOS 1.5a (c) 1985 R.K.Bennett
TOP DOS 1.5 Plus (1986)
TOP DOS Professional (1986)
---------------------------
- Developed by R.K. Bennett for Sunny Software / Eclipse Software
- Sold commercially by Sunny Software (original DOS-MOD release) or
Eclipse Software (later DOS-MOD release and all releases of TOP-DOS)
- DOS-MOD: Enhances Atari DOS 2.0S
o Menu-driven, Full screen use
o Command files
o Expanded wildcard capability
o Fixes 11 bugs in DOS 2.0S
o Single and Double Density versions
o DD version supports HELLO command file option on startup
o DD version supports cartridge-bypass feature on startup
o DD version can also run in the SD mode
- TOP-DOS: Standalone product, includes all the features of DOS-MOD
o Uses Atari DOS 2 single and double density filesystems, or
proprietary variations on the DOS 2 filesystem. The TOP-DOS unique
filesystem is not supported by any other DOS for the Atari.
o 1 to 8 disk drives
o Alphabetization and compression of the disk directory
o Drive support: 5.25": SD, DD, DSDD. 8": DD
o Specify the number of sectors desired, up to 944 per side in single
density and up to 1968 in double density
o Reformat only the VTOC, on a previously formatted disk
o RAM drive support: Axlon or Mosaic banked memory
- TOP-DOS 1.5:
o RAM drive support: Port B banked memory
o 1050 Enhanced Density Support
o "WISE" Density Control
o High Speed Data Transfer (Happy Warp Speed)
o Improved Status Display
o Hex-Decimal Conversion
o 90KiB buffer for one-pass disk duplication
o Four-level command file nesting
o Ad: Antic v4n9 Jan86 p.44
o Shipped with: Astra "Big D" (later units), Astra The "One"
o Also distributed by Happy Computers, Inc., 1986- for use with Happy 810
Enhancement (Rev 7 capable units) or Happy 1050 Enhancement
- TOP DOS 1.5 Plus:
o Allows multiple RAM drives (Port B banked memory), SD or DD
o Accesses Atari DOS 2.5 files
o Supports other RAM boards
o New sector number display and tone control
o Better warp speed and group autorun control
o BASIC enable/disable for XE/XL with built-in BASIC
- TOP DOS Professional:
o Up to 16MB disk capacity
o Sub-directories
o Sector read, write & compare
o File compare
- 1.5 Plus / Professional ad: Antic v5n2 Jun86 p.27
- Apparently released into the public domain, approximately 2005

MYDOS
-----
MYDOS 3.05 [reported to exist]
MYDOS 3.07 -- copyright 1983,WORDMARK (August 16, 1983)
MYDOS 3.08 -- copyright 1983,WORDMARK
MYDOS 3.12 -- copyright 1983,WORDMARK ATR8000 RS232 Version, by C. Marslett MYDOS 3.09 [reported to exist]
MYDOS 3.13 (August 8, 1984)
MYDOS 3.010 - copyright 1983,WORDMARK
MYDOS 3.011 - copyright 1984,WORDMARK
MYDOS 3.16 [reported to exist]
MYDOS 3.012 - copyright 1984,WORDMARK
MYDOS 3.013 - copyright 1984,WORDMARK
MYDOS 3.18 -- copyright 1984,WORDMARK ATR8000 RS232 Version, by C. Marslett MYDOS 3.014 - copyright 1985,WORDMARK (February 18, 1985)
MYDOS 3.19 -- copyright 1985,WORDMARK ATR8000 RS232 Version, by C. Marslett MYDOS 3.015 [reported to exist]
MYDOS 3.016 - copyright 1985,WORDMARK
MYDOS 3.016AX copyright 1985,WORDMARK Axlon RAMdisk version
MYDOS 3.116 - copyright 1985,WORDMARK ATR8000 RS232 Version, by C. Marslett MYDOS 4.0 --- copyright 1985,WORDMARK
MYDOS 4.2 --- copyright 1985,WORDMARK
MYDOS 4.2C -- copyright 1985,WORDMARK
MYDOS 4.3A (October 21, 1986)
MYDOS 4.3B -- copyright 1986,WORDMARK
MYDOS 4.50 -- Copyright 1988,WORDMARK (11/28/88 freeware, from Bob Puff)
MYDOS 4.50T - Copyright 1988,WORDMARK
MYDOS 4.51 -- copyright 1989,WORDMARK (6/14/89)
MyDOS 4.53/3 and 4.53/4 (David R. Eichel rel.ver.1/1/90)
MyDOS 4.55 Beta (Lee Barnes March 17, 2003)
-----------------------
- Primarily developed by Charles W. Marslett
- Menu driven, modeled after Atari DOS 2
- Uses Atari DOS 2 single and double density file systems, extended with
support for larger capacity diskettes
- First Atari DOS to support dynamic density changes (user-initiated, but
without rebooting the system).
- Earlier versions were sold commercially; 4.5x versions shareware/freeware
- Versions 3.x sold by SWP for use with the ATR8000:
- 3.0x versions are the standard releases
- 3.1x versions have an integrated R: handler for the ATR8000 serial port
- Sold by SWP in disk-side or system disk builder pairs. Known version-
pairs include: 3.08/3.12, 3.09/3.13, 3.011/3.16, 3.013/3.18, 3.014/3.19
- 3.2x versions were developed for use with the never-shipped SWP ATR8500
- Versions after 3.08/3.12 include support for subdirectories
- RDOS 800 (early name ROMDOS) is MYDOS 3.0 but can occupy less user RAM.
- Revisions: 0.0, 0.1 (1984), 0.11, 0.12, 0.14. Versions:
- Can reside in the 4KiB unused memory address space in the 400/800
(49152-53247 or $C000-$CFFF) for permanent availability on ROM
(i.e., Newell Ramrod personality board or CDY Omnimon! board)
- Can reside in OSS SuperCartridge banked RAM address space
- Can reside in standard RAM
- 0.14 additionally can reside under XL/XE built-in BASIC
- OMNIDOS is Wordmark ROMDOS/RDOS and CDY Omniview on one 8KiB chip for
Newell Ramrod personality board or CDY Omnimon! board
- MYDOS 3.016 shipped with: Astra "Big D" (earlier units)
- Versions 4.x include support for high capacity drives (hard drives), up
to 16MiB per partition.
- Versions 4.x include support for a RAM drive of up to 1MiB, using either
Axlon banked memory or Port B banked memory.
- Versions 4.x have full read compatibility with the Atari DOS 2.5 format,
but will only write to the first 720 sectors of the disk. (MYDOS has its
own format for enhanced density disks that allows full access.)
- Versions 4.x shipped with RS-232 driver for the ATR8000
- MYDOS 4.x shipped with: SupraDrive, BTL Hard Disk System,
TOMS 720 (on ROM), Newell 256KXL
- Version 4.3 adds 'S' command to set the RAM drive number and adds 'V' to
turn on and off write-verify.
- Versions 4.5x include:
- ATARI850.AUT - for loading the R: handler from the 850 interface ROM
- ATR232.AUT - RS-232 driver for the ATR8000
- ATR232HD.AUT - RS-232 driver for ATR8000 with ATR hard disk interface
- Bob Puff/Computer Software Services offers version 4.50 (first freeware
release): http://www.nleaudio.com/css/files/MYDOS45M.ARC
- Charles Marslett/Wordmark Systems makes version 4.51 source code available:
http://www.wordmark.org/mydos.html
- MyDOS 4.53 was released by David R. Eichel on 1/1/90, making minor changes
from the released 4.50 and 4.51 source code.
- Supports multiple AUTORUNs at boot up (*.AR0 through *.AR9).
(Support for the traditional AUTORUN.SYS is removed.)
- Fixes broken Axlon banked memory RAM drive support
- Version 4.53/3 gives 3 character file length/free sector count instead
of the normal (for MyDOS) 4.
- Version 4.53/4 is the same as 4.53/3, but uses a minimum of four
characters in the sector count just like most versions of MyDOS.
- More recent work on MyDOS by Lee Barnes is available, along with many
earlier MYDOS versions, from Mathy van Nisselroy's MyDOS page:
http://www.mathyvannisselroy.nl/mydos.htm

DOS 4.0 (Copyright 1984 Michael Barall, released to the PD via Antic in 1986) -------
- Developed by Michael Barall for Atari as QDOS during 1983-1984.
- Existed as early as July 1983. (source code)
- Speculation: Originally commissioned by Atari, Inc. as a DOS III candidate.
- While not selected as DOS 3 in fall 1983, the QDOS project was revived in
winter 1984 when the 1450XLD project was revised to include a larger-
capacity 360KiB disk drive than could be supported by the released DOS 3.
- Atari hired Barall to direct Atari OS and QDOS development in April 1984.
- Rights to QDOS reverted to Barall upon the July 1984 sale of Atari assets
by Warner Communications.
- QDOS development continued into fall 1984, when Atari, Corp. ultimately
declined to acquire the software (pitched as: Atari DOS 4.0).
- Released by Barall into the public domain as DOS 4.0 through the Antic
Catalog, first appearing in the February 1986 issue of Antic magazine.
- Supports any combination of serial bus (SIO) and parallel bus disk drives
- Supports 8 physical drives (1-8), and 10 logical drives (D0:-D9:)
- Data on the disk is physically organized into sectors:
SD disks: sector = 128 bytes
2D or DD disks: sector = 256 bytes
- Data on the disk is logically organized into blocks:
SD disks: 6 sectors/block, or 768 bytes/block
SS/2D or SS/DD disks: 3 sectors/block, or 768 bytes/block
DS/DD disks: 12 sectors/block, or 3,072 bytes/block
- Five disk drive types supported:
A. SS/SD 810: 708 sectors
708 sectors / 6 sectors/block = 118 blocks
118 blocks * 768 bytes/block = 90,624 bytes
B. SS/2D 1050: 513 sectors
513 sectors / 3 sectors/block = 171 blocks
171 blocks * 768 bytes/block = 131,328 bytes
C. SS/SD Percom compatible: 708 sectors
708 sectors / 6 sectors/block = 118 blocks
118 blocks * 768 bytes/block = 90,624 bytes
D. SS/DD Percom compatible: 711 sectors
711 sectors / 3 sectors/block = 237 blocks
237 blocks * 768 bytes/block = 182,016 bytes
E. DS/DD Percom compatible: 708 sectors
708 sectors / 6 sectors/block = 118 blocks
118 blocks * 3,072 bytes/block = 362,496 bytes
- Allocation of blocks is controlled by the contents of a sector called the
Volume Table of Contents (VTOC). (A large VTOC may occupy two sectors.)
- File directory cannot contain more than 128 entries
- Filesystem could support disks up to 384KiB (drac030, AA Forums 2010.07.21)
- DOS 2 to DOS 4 Conversion Program
- DOS 3 to DOS 4 Conversion Program

SmartDOS Beta Test Version 1.5R (C)1984 John Chenoweth & Ron Bieber
SmartDOS (C)1984 John Chenoweth & Ron Bieber
distributed by Rana Systems 6.1D
SmartDOS (C)1984 John Chenoweth & Ron Bieber
for The Programmer's Workshop 8.2D
--------------------
- Disk drive types supported:
1) Atari 810 (& compatible)
2) SSDD 5.25" Single-Sided, Double Density
- Disk allocation/filesystems:
1) Atari DOS 2.0 Single Density
2) Atari DOS 2.0 Double Density
- First Atari DOS to be "Density Smart" (changing between the disk drive's
density settings dynamically, in accordance with the format density of the
inserted media, without user-intervention)
- Menu additions that allow sector copying, drive speed checking, bad sector
testing, write verify on/off, and drive reconfiguration
- Original Master diskette, shipped with earlier SmartDOS versions, contains:
DOS.SYS, DUP.SYS, DEFAULT, ARCREATE.BAS, RS232.ARx, AUTORUN.SYS
- DOS.SYS is Atari DOS 2.0S version under license from Atari.
- Disk is used only to create a Working Master diskette.
- Working Master diskette, created using the AUTORUN.SYS file on the Original
Master diskette, or shipped with later SmartDOS versions, contains:
DOS.SYS, DUP.SYS, DEFAULT, ARCREATE.BAS, RS232.ARx
- DOS.SYS is proprietary SmartDOS version.
- ARCREATE.BAS is used to create a file that will autorun a BASIC file upon
system boot.
- Multiple autoload file support, for files named *.AR1 through *.AR9
- RS232.ARx loads the R: handler from the 850 interface ROM.
- Should be renamed RS232.AR1 to be autorun by SmartDOS
- Supports both warm and cold re-boots of the system
- Shipped with: Rana 1000, Astra 2001, Astra 1001

Mach DOS v2.1 XL (c) 1984 stace
Mach DOS v2.6 XL (c) 1984 stace
MachDOS v3.7a (c) 1985 stace
-------------------------------
- By Hadley V. Stacey
- Pre-release name: MACH 2XH DOS
- Early versions supplied with the NCT 810 Turbo (1984 units); later released
directly into the public domain
- Disk drive types supported:
1) Atari 810 (& compatible)
2) SSDD 5.25" Single-Sided, Double Density
3) DSDD 5.25" Double-Sided, Double Density
- Disk allocation/filesystems:
1) Atari DOS 2.0 Single Density
2) Atari DOS 2.0 Double Density
3) DOS 2.0 Double-Sided, Double density
- Intelligent detection and support for double density and double-sided disks
- v.3.7a RAM drive for banked memory. Types supported: Port B, Axlon, Mosaic,
Intec boards as well as the 800+ and MACE modifications
- Mach File disk image files
- [SELECT] key toggles menu on-screen

SpartaDOS Version 1.1 Copyright (C) 1984 by ICD, INC.
SpartaDOS Version 2.3b D Copyright (C) 1985 by ICD, INC.
SpartaDOS Version 2.3b C Copyright (C) 1985 by ICD, INC.
SpartaDOS Ver 2.3e 1-Nov-85 D Copyright (C) 1985 by ICD, INC.
SpartaDOS Ver 2.3e 1-Nov-85 C Copyright (C) 1985 by ICD, INC.
SpartaDOS Ver 3.2c 30-Jan-86 Copyright (C) 1986 by ICD, Inc.
SpartaDOS Ver 3.2d 17-Feb-86 Copyright (C) 1986 by ICD, Inc.
SpartaDOS Ver 3.2f 25-Feb-94 Copyright (C) 1994 by FTe
SpartaDOS Ver 3.2g 04-Jun-94 Copyright (C) 1994 by FTe
SpartaDOS Ver 3.2gx 04-Jun-94 Copyright (C) 1994 by FTe ---------------------------------------------------------------
- Originally developed by Mike Gustafson of Spartan Software of Minnesota/
ICD, and shipped alongside US Doubler as ICD's first two products in 1984.
- Version 1.1:
o Supports 5.25" and 8" floppy disk drives, single- or double-sided,
single, enahnced, or double density (35, 40, 77, or 80 tracks)
o Supports 4 disk drives
o SPCOPY command for single or dual drive transfers between SpartaDOS
and/or Atari DOS 2 compatible formats
o AT_RS232 R: handler for ATR8000
o Disk allocation/filesystem: SpartaDOS File System (SDFS) version 1.1
o 128 or 256 bytes/sector
o Four sector types:
- Disk descriptor - Sector 1. Among other data, includes indicator
of the number of (consecutive) sectors in the main DOS boot.
- Bit map. One or more sectors together containing a list of bits
corresponding to all sectors on the disk, indicating whether each
sector is currently in use.
- Sector map. Lists of sector numbers of the data sectors used by a
particular file or directory.
- Data sectors. One of:
- Directory data. The directory is a special file that contains
entries about each file and each subdirectory it contains,
including: filename, time/date, length, first sector map
number, and status. The first entry in the directory contains:
the first sector map of the parent director, the length of the
directory, and the directory name.
- File/User data
o Up to 128 files per directory/subdirectory
o Time/date stamping
o Disks have volume names. Every disk must have a unique name.
o Up to 16MiB per drive
o RAM drive support:
o RDAXLON.COM, supplied with SpartaDOS 2.3, sets up a 112KiB Axlon
banked memory RAM drive
- Several flavors of Version 1.1:
o STD_HS.DOS (original name) or SPEED.DOS (later name)
- Full version including UltraSpeed support
o STD.DOS (original name) or STANDARD.DOS (later name)
- Full version except without UltraSpeed support
o RO_HS.DOS (original name) or NOWRITE.DOS (later name)
- Miniature version; can only read from disk; UltraSpeed supported
o RO.DOS (early distribution only)
- Miniature version; can only read from disk; no UltraSpeed support
o NOCP.DOS (later distribution(s) only)
- No command processor (but can both read/write); UltraSpeed supported
- Tries to load an AUTORUN.SYS file before it passes control onto the
cartridge
- Changes for Version 2.3, packaged as the SpartaDOS Construction Set, which
was supplied with many ICD US Doubler units and also sold separately:
o Requires a 64KiB XL/XE
o An enhanced Atari DOS 2 handler: Can read, write, and run Atari DOS 2
formatted diskettes in both single and double density
o Supports 8 disk drives
o UltraSpeed High Speed built in
o 14 new internal command processor commands
o 8 new XIO functions
o Extra 4KiB program area
o RAM drives:
- RDBASIC.COM sets up an 8KiB RAM drive on any XL/XE computer
- RD130.COM sets up a 64KiB RAM drive on a 130XE
o Disk allocation/filesystem: SpartaDOS File System (SDFS) version 2.0.
Relative to SDFS 1.1:
- The first three sectors on the disk are boot sectors. They contain
the program that loads in the DOS, links it into the system, and enters
the command processor. Sector 1 also contains the disk discriptor
data as in SDFS 1.1.
- Only the first 128 bytes of each boot sector are used (same whether
the disk is formatted in 128 or 256 bytes/sector)
- Sector 1 disk descriptor data additions:
- Volume sequence number (avoid problems with non-unique volume
names)
- Volume random number (avoid problems with non-unique volume names)
- Sector number of the first sector map of the file to be loaded when
the disk is booted (usually a DOS file)
- Write lock flag
- Sector 1 disk descriptor data no longer used:
- Number of buffers reserved for sector storage
- Number of sectors in the main DOS boot
- Two flavors of 2.3 (2.3b, 2.3e) versions:
o XD type (XD23B.DOS or XD23E.DOS) is the full powered DOS; recognizes
the STARTUP.BAT file when booted and priority is given to DOS (rather
than the cartridge).
o XC version (XC23B.DOS or XC23E.DOS) is the same as XD versions except
AUTORUN.SYS is recognized when booted and control priority is given to
the cartridge.
- Changes for Version 3.2, which was supplied with the ICD R-Time 8 and also
packaged as the SpartaDOS Construction Set, which was supplied with many
ICD US Doubler units and also sold separately:
o Better time and date support (internal TD, TIME, DATE commands)
o Internal R-Time 8 interface
o Internal JIFFY clock interface (for non- R-Time 8 users)
o Internal 32 character keyboard buffer (and KEY command)
o Automatic mini-buffer system for fast byte PUT and GET functions
o New vectors added for machine language support
o Control returned to DOS if DOS was active during RESET
o Supports both a STARTUP.BAT and an AUTORUN.SYS file
o Compatible with BASIC XE, 1200XLs and many modified Operating Systems
o BASIC ON/OFF command operation from within a batch file (not end only)
o NOISY I/O flag recognized
o Support for the Supra Hard Disk Interface
o All command entry in upper or lower case
o Full read capability for Atari DOS 2.5 type enhanced density format
o New RAM drives:
- RD.COM supports the standard 130XE, the 130XE with 64KiB RAM upgrade
(from Ron Boling) and the 256KiB RAMBO XL upgrade for the 800XL and

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