www.theoldcomputer.com

Hi,

I've just downloaded a couple of emulators (Rainbow, for one), but both need Atari OS (OP_SYSTEM, OP_SYSXL, etc.) and I don't know how to get hold of them.

Can anyone help me please?

Thank you.

I have an iMac and a Macbook.

it might be here http://www.theoldcomputer.com/roms/inde ... Boot/Atari

Thanks,

I've downloaded some of them but there's nothing that looks like what I need. I really need a precise name/location. Even Google isn't much help. Did you get hold of them yourself or do you use an emulator for another type of Atari?

I'll get there in the end.

Bye,

Andy

First of all take a look in here
http://www.theoldcomputer.com/roms/inde ... ri/8bit/os

Then also check here
http://www.theoldcomputer.com/roms/inde ... Boot/Atari

If you can not find what you need in these two locations then I will be very surprised. We might need to go digging for an answer to your problem.

Subject: 7.4) What are Atari DOS 1, DOS 2.0S, DOS 3, DOS 2.5, and DOS XE?

Here are short descriptions of the various Disk Operating Systems (DOS)
versions produced by Atari for use with their 8-bit computers.

The original Atari DOS shipped with all 810 disk drives from 1979-1981. It
consists of a single file, DOS.SYS, which is loaded into memory from disk on
startup.
At the top of the menu screen it reads:
DISK OPERATING SYSTEM 9/24/79
COPYRIGHT 1979 ATARI
Unless you are a collector, you probably have no reason to work with DOS 1.
Trivia: The "N. DEFINE DEVICE" menu option does not work.
The DOS 1 disk is labeled: Atari 810 Master Diskette (CX8101).

DOS II Version 2.0S was shipped with all 810 disk drives, and early 1050 disk
drives, from 1981-1983. It consists of two files:
DOS.SYS is loaded into memory from disk on startup
DUP.SYS, which contains the DOS menu, is loaded only when needed.
MEM.SAV can be employed to preserve the contents of memory to disk when
DUP.SYS is loaded, so that the data can be restored to memory when exiting
from the DOS menu. DOS 2.0S supports Atari's proprietary single-sided, single
density 90K 5.25" floppy disk format only. DOS 2.0S represents the lowest
common denominator of Atari DOS versions--you can be assured than any Atari
disk drive for the 8-bit Atari can work with disks formatted with DOS 2.0S.
DOS 2.0S can read disks written with DOS 1; the reverse is not the case. The
DOS 2.0S disk is labeled: Atari 810 Master Diskette II (CX8104).

DOS II Version 2.0D was shipped with the rare Atari 815 Dual Disk Drive.
Supports double-density disk drives; also supports single-density disk
drives.
The DOS 2.0D disk is labeled: Atari 815 Master Diskette (CX8201).

DOS 3 shipped with 1050 disk drives from 1983-1985. It was created in part to
take advantage of the 1050's Dual-Density capability, by employing a single-
sided, enhanced-density 128K 5.25" floppy disk drive format. Atari called
this format "dual-density," but the Atari community quickly came to refer to
this format as "enhanced-density" to better differentiate it from widely
available 3rd-party truly double density disk drives and supporting versions
of DOS. DOS 3 uses a disk format incompatible with DOS 2.0S. It included a
utility to convert files from DOS 2.0S to DOS 3, but not back again. It used
disk space less efficiently than DOS 2.0S. For these reasons and others, DOS
3 was not widely accepted by the Atari community, and like DOS 1 is not
generally used except for curiosity's sake. The DOS 3 disk is labeled: Master
Diskette 3 (DX5052).

DOS II Version 2.5 shipped with 1050 disk drives and early XF551 disk drives
from 1985-1988. DOS 2.5 represented Atari's relenting to the masses,
returning to DOS 2.0S compatability. DOS 2.5 very closely resembles DOS 2.0S,
with just a few features added. It supports both DOS 2.0S single-density 90K
formats, as well as an enhanced density 128K format for use with the 1050 disk
drive. DOS 2.5 also includes a RAMdisk utility for use with the 128K 130XE
computer, a utility to convert files from DOS 3 disks back to DOS 2.5, and
other disk utilities. DOS 2.5 is just about as universal among Atari users as
DOS 2.0S.

DOS XE shipped with XF551 disk drives from 1988-1992. Like DOS 3, DOS XE
introduced a whole new format for Atari floppy disks; but unlike DOS 3, DOS XE
also preserved general compatability with DOS 2.0S/2.5. DOS XE supports the
full capabilities of the double-sided, double density 360K per 5.25" floppy
disk XF551 disk drive, including that drive's high-speed burst mode. DOS XE
also fully supports the 90K SS/SD capability of the 810 disk drive, the 128K
SS/ED capability of the 1050 disk drive, the 180K SS/DD capability of most
3rd-party disk drives for the Atari, and a RAMdisk for use with the 130XE.
Date-stamping of files is supported. DOS XE requires an XL or XE computer; it
is not compatable with the 400/800 computer models. Even though DOS XE was
critically well-received, and represented a substantial jump in capabilities
over DOS 2.5, its arrival came so late in the crouded realm of Atari and 3rd-
party DOS versions that it never achieved much acceptance among real users,
and is now relegated to the same status as DOS 1 and DOS 3 before it. Before
its release, DOS XE was widely known as "ADOS."

http://www.classiccmp.org/dunfield/atarixl/atari8b.txt

Hot Trout,

I'm now up and running, and ready to get to grips with games I've not looked at for over 20 years!

Every bit of advice I can get on this forum is much appreciated.

Regards,

Andy

I take it that you found what you were looking for? Glad to have helped. For anyone on the forums, when you want to thank them simply click the THUMBS UP graphic in the top right of the post that you want to thank.

Enjoy.

OK. Duly THUMBS UP'd.

Bye.