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Anybody heard of MyDOS256?


DavidMil

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It was a version of MyDOS 3.05 that supported the 256K upgrade for the old Atari 800. This upgrade worked seamlessly with

with SynFile+ and Syncalc. When you booted either of these two programs they would say "288K RAM Present". It also gave

you a 946 sector double density RAM disk. Ross Beers created this version and it was originally put out by LAACE BBS under

the file name MYDOS256. I ask this because I came across the RAM and ROM board upgrades while I was looking for a

still AWOL 600XL system board that I got angry at a long time ago and shelved. As I recall this upgrade worked well with

Omnimon! when I wanted to load a whole disk to be; well, modified (some would say hacked).

 

Any help would be appreciated!

 

Thanks,

DavidMil

 

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Hello MrFish

 

Thanks! I already uploaded the ROM file to my site and have changed the layout a wee bit. I don't know how to test the ROM so I haven't tested the file on "autocorrection by downloading on anything else than an Atari 8 bit computer".

 

Sincerely

 

Mathy

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Hey Mathy, your mydos page says "This picture I found on http://atarixe.dotnet.lv/DOS/MyDOS.htm. The site was in Letvia. I'ld have loved to know what was being said on this page. Unfortunately, the site seems to have disappeared."...

 

 

https://web.archive.org/web/20011221134459/http://atarixe.dotnet.lv:80/DOS/MyDOS.htm

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Hey Mathy, your mydos page says "This picture I found on http://atarixe.dotnet.lv/DOS/MyDOS.htm. The site was in Letvia. I'ld have loved to know what was being said on this page. Unfortunately, the site seems to have disappeared."...

 

 

https://web.archive.org/web/20011221134459/http://atarixe.dotnet.lv:80/DOS/MyDOS.htm

it says

The MyDOS 4.53 operating system was developed for Atari microcomputers in 1988 by WORDMARK Systems (developed by Charles Marslett and Robert Puff). The latest version is 4.53. The system was developed based on Atari DOS 2.x and inherited from it a shell-menu with commands. However, the interface of this operating system was more user friendly. Also this system was very well compatible with DOS 2.x programs and floppy disks. Single-sided single-density discs of 40 tracks of both systems were compatible with each other. Also MyDOS allowed to read disks of the expanded density of the DOS 2.5 system. The system supported single-sided and double-sided floppy disks in 40/80 single and double density tracks. Also, support for hard drives up to 16 megabytes in size and built-in support for a RAM disk were built in. The system still allowed to place up to 64 files in a subdirectory, but it was possible to create subdirectories. Each subdirectory allowed to place inside another 64 files or subdirectories. You could rename any executable file to AUTORUN.SYS. Then it automatically loaded when the system rebooted. Basic devices are the same as in DOS 2.0s.

 

To work with a RAM disk, hard disks and high-density floppy disks, the system needed to be configured. The new configuration was remembered on disk and was restored automatically upon reboot.

 

For the MyDOS operating system, Norton Commander was developed - a similar shell - Toms Navigator (the system command processor was replaced - the dup.sys file):

 

I do not see it other than a russian dialect translation of what know.. any specific part you are looking for?

Edited by _The Doctor__
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It was a version of MyDOS 3.05 that supported the 256K upgrade for the old Atari 800. This upgrade worked seamlessly with

with SynFile+ and Syncalc. When you booted either of these two programs they would say "288K RAM Present". It also gave

you a 946 sector double density RAM disk. Ross Beers created this version and it was originally put out by LAACE BBS under

the file name MYDOS256. I ask this because I came across the RAM and ROM board upgrades while I was looking for a

still AWOL 600XL system board that I got angry at a long time ago and shelved. As I recall this upgrade worked well with

Omnimon! when I wanted to load a whole disk to be; well, modified (some would say hacked).

 

Any help would be appreciated!

 

Thanks,

DavidMil

 

 

I found this in my archives, David... maybe it'll help?

 

--Tim

 

https://atari-owner.com/fun/MYDOSPLS.ZIP

 

(Tried uploading as attachment on this site, but no-go; thus the offsite link)

Edited by Timothy Kline
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Re: MYDOSPLS

 

I downloaded Tim's file, and it shows no file type under Windows. But after looking at the file from the Atari screen editor, it says it is a patch file to convert MyDos 3.015 to MyDospls.

 

So (assuming that the file works properly), we would still need 3.015. I have 3.013, but not 3.015 (and I didn't try 3.013). There are so many different early versions of MyDos...

 

Edit: I did try it with MyDos 3.013, and it fails -- it appears aware that it is not 3.015 in D1:. The patch file does load and run, but terminates with an error. We're going to need to come up with 3.015.

 

3.015 is mentioned in this thread (including "Archive Copy"):

http://atariage.com/forums/topic/169735-sweet-8-bit-haul/

 

 

Re: MyDos 3.116.rom -- I've never seen this one before -- for the elusive ROMDOS setup?

 

-Larry

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It was a version of MyDOS 3.05 that supported the 256K upgrade for the old Atari 800. This upgrade worked seamlessly with

with SynFile+ and Syncalc. When you booted either of these two programs they would say "288K RAM Present". It also gave

you a 946 sector double density RAM disk. Ross Beers created this version and it was originally put out by LAACE BBS under

the file name MYDOS256. I ask this because I came across the RAM and ROM board upgrades while I was looking for a

still AWOL 600XL system board that I got angry at a long time ago and shelved. As I recall this upgrade worked well with

Omnimon! when I wanted to load a whole disk to be; well, modified (some would say hacked).

 

Any help would be appreciated!

 

Thanks,

DavidMil

 

 

Interesting you mention this, because... I remember testing SynCalc on Incognito (from the ORIGINAL bootable-disks), as well as the .ATR images available on-line, and when configuring Incognito on Colleen Mode, with AXLON (1 Mbyte) expansion active, and then booting SynCalc for 800, directly, it recognized the memory entirely on its own (you could see it by the # of cells available)...

Edited by Faicuai
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Hello guys

 

What is MyDOSpls?

 

You can find an ARC file that will build 3.013 for ye' on my MyDOS page.

 

Sincerely

 

Mathy

 

Hi there, Mathy,

 

That was the file closest to what David was describing that I could find in my Atari archives here, and my hope was that it would help him get closer if the actual MyDOS version didn't turn up. The patch file would help someone (I hoped) see what needed to be done to add the feature into subsequent releases of MyDOS, too. Beyond that, I think MyDOSPls falls into the FWIW category. :)

 

--Tim

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Files on these ATR's should help out what to modify...

 

attachicon.gif800+RamDisk01A.ATR

attachicon.gif800+RamDisk01B.ATR

 

Dos 2.5 already modified for 800 Plus 256k mod...

 

If you have an IDE+2, be careful of these files. I booted these with the IDE+2 attached (holding down SHIFT, I think) and by doing that, it clobbered the HD partition. I had to set the HD up completely from scratch, partitioning and everything. I'm not sure what happened, but it was working perfectly before I booted, then nothing. Yes, I know they are for an 800, but I wanted to see how it behaved, loading into an XL. Now I know... :_(

 

-Larry

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If you have an IDE+2, be careful of these files. I booted these with the IDE+2 attached (holding down SHIFT, I think) and by doing that, it clobbered the HD partition. I had to set the HD up completely from scratch, partitioning and everything. I'm not sure what happened, but it was working perfectly before I booted, then nothing. Yes, I know they are for an 800, but I wanted to see how it behaved, loading into an XL. Now I know... :_(

 

-Larry

I don't think the RamDisk mod would affect the $D5xx control register area that might cause that condition. Ram Disks just use PORTB for the bank selection.

 

What version(s) of the IDE+2 do you have?

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The 800 RAMDisks don't use PORTB (it's too busy controlling the other two joysticks for MULE).

I guess so... looking at the source reveals it's using $D701 as the control register to switch banks, learn something new everyday :)

10    *=$B86
11  LDX #0
12    *=$B88
13  CMP #7 ;DRIVE #7
14  .BYTE $B0,$47
16    *=$105C
17  LDA #$64 ;$64=100
18    *=$105E
19  CPY #7 ;DRIVE #7
20  BCS $1076
22    *=$12DE
23  JSR $12ED ;LOAD Y FROM ADR.$21= GET DRIVE #
24    *=$12ED
25  LDY $21 ;  LOAD Y FROM ADR.$21= GET DRIVE #
26  CPY #8 ;  SEE IF DRIVE #8
28  BCC *+4 ;  IF NOT JMP TAY
30  ADC #5
32  TAY
34  LDA $185B,Y ;  GET BANK # FRON TABLE IN 185B
36  JMP $1846 ;  DO BANK SWITCH
38  RTS ; RETURN ?
40    *=$148D
41  CMP #6
42    *=$14C4
43  LDA #$70
44  JSR $1846
46    *=$183A
47  .BYTE "MEM.SAV ERR",$9B
48    *=$1846
49  STA $44 ;STORE BANK #
50  LDA $D0 ;$D0=0 1st TIME
52  AND #$00
54  ORA $44 ;ORA W/# IN $44=BANK #
56  STA $D701 ;CHNG BANK #
58  STA $D0 ;NEW BANK #
60  RTS
62    *=$185B
63  .BYTE $01,$02,$03,$04
64  .BYTE $05,$06,$07,$08
66  .BYTE $09,$0A,$0B,$0C ; TABLE  OF BANKS = 12 FOR 800+
68    *=$70A
69  .BYTE $C3
70    *=$77F
71  CPX #7 ;DRIVE #7
72  BCC $78A ;78A OR 7BA ?

So it's possible to have a conflict with other devices :-o

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The 800 RAMDisks don't use PORTB (it's too busy controlling the other two joysticks for MULE).

Yes, but most of the 800 ramdisks are using 0xCFFF as

their control register. Only a few early ones were built

using the Byrd type but with 0xD7xx as the control

register since 0xD7xx is available so easily on the

800.

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  • 2 years later...
On 12/13/2018 at 5:35 PM, Timothy Kline said:

 

I found this in my archives, David... maybe it'll help?

 

--Tim

 

https://atari-owner.com/fun/MYDOSPLS.ZIP

 

(Tried uploading as attachment on this site, but no-go; thus the offsite link)

 

Broken link now, is it available somewhere else, or could someone re-post the file here?   Thanks!

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