55 replies to this topic

[Allan]

Hey, there is a black sticker/dot on that one.  Hmm... I thought so...

So what do you think that means? Maybe a way Atari knew what was an update version without having to print a whole new disk label?

 

Allan

[KLund1]

I have wondered about the black dot when I look at DOS 3 disks. Now with that peek listed above, we can now see what that means. Dot Good? Dot Bad?

[kheller2]

Yeah, I've seen with and w/o dot and I swear I saw blue at one time.  Would have to dig around in the piles of disks to see if there is a difference.  I know i used to buy DOS 3 disks in bulk from some place in the 80s.

[BillC]

Yeah, I've seen with and w/o dot and I swear I saw blue at one time.  Would have to dig around in the piles of disks to see if there is a difference.  I know i used to buy DOS 3 disks in bulk from some place in the 80s.

IIRC it was Best Electronics who sold them in 100 quantity back in the day fairly cheap, ideal for those who wanted un-notched disks.

[kheller2]

Hmm The DOS 3 mystery deepens... according to Mapping the Atari:

 

3889            F31             DOS 3

 

 

     If you PEEK here and get 76 ($4C), you have an early version of

     DOS 3 (the later version will read 78). To correct some errors in

     the earlier FMS files, type this in:

 

     10 FOR N=1 TO 9:READ A,B:POKE A,B:NEXT N

     20 DATA 3889,78,3923,78,3943,78,3929,76,389

        5,76

     30 DATA 3901,77,3935,77,3955,77,2117,240

 

 

 

 

 

Yet nothing in there touches location 1816.  Is there a DOS 3 map anywhere that states what location 1816 0x718 is used for?

[_The Doctor__]

bump, as there was a podcast and resultant DOS along with it. someone should run it down and put it here... cross posting can be nice. I just remembered this. I can't remember more at the moment. If some one could be so kind and post the links.

Edited by _The Doctor__, Thu Nov 8, 2018 1:41 PM.