[Coco] error 249

[Stephen H. Fischer]

Actually 5-1/4" 80T2S drives were / are  rare, I just got mine just at the right time.

Later I then replaced one of the 5-1/4" 80T2S drives with a 3.5" one and with the options available on both drives installed a toggle switch that swapped "/D0" and "/D1". I then made 3.5" copies of all my 5-1/4" disks.

I was able (At only the correct time of course) to flip the drives and insert the other format disk swapping on the fly, messing up rarely.

Making 3.5" copies of all my disks allowed me to miss the expire by date of almost all my 5-1/4" floppies and lost only part of one when I burned all to a CD.

With the pair of 2880 floppies and 512K memory it was a great and efficient "C" development and testing system with often 2/3/4 windows displayed at the same time. Tandy with the default windows showed what could be done and I built a new very useful set of windows.

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

I seem to be missing if what Gene and Robert G. changed is in the current system, if YES then DNS=3 must be almost required for all 80T2S disks. Both 3.5" and 5-1/4" floppies! And all the .dsk on the Internet. :) 

SHF
 

----- Original Message ----- 
From: "Bill" <cwgordon at carolina.rr.com>
To: "'CoCoList for Color Computer Enthusiasts'" <coco at maltedmedia.com>
Sent: Saturday, March 18, 2017 12:56 PM
Subject: Re: [Coco] error 249


> Unfortunately I have no 5 1/4" drives, so all I'm using is 3 1/2".
> 
> -----Original Message-----
> From: Coco [mailto:coco-bounces at maltedmedia.com] On Behalf Of Stephen H. Fischer
> Sent: Saturday, March 18, 2017 1:56 PM
> To: CoCoList for Color Computer Enthusiasts
> Subject: Re: [Coco] error 249
> 
> "DMODE /Dn stp=03 typ=03 cyl=50 DNS=3" Per Gene.
> 
> The "lsn0" program I used is on the SHF888.dsk (zip) disk on my website:
> 
> http://home.mindspring.com/~sfischer1/
> 
> I bet that DNS=3 is the value which is incorrect for a 40T2S floppy. Earthlink's demise may prevent me from fixing it.
> 
> Somebody please tell us what the other program that will read "any" lsn0 sector and display the data in human understandable format.
> 
> SHF 
> 
> ----- Original Message ----- 
> From: "Bill" <cwgordon at carolina.rr.com>
> To: "'CoCoList for Color Computer Enthusiasts'" <coco at maltedmedia.com>
> Sent: Saturday, March 18, 2017 10:10 AM
> Subject: Re: [Coco] error 249
> 
> 
>> So I should "DMODE /Dn stp=03 typ=03 cyl=50" and make sure the dns=1.
> 
> No, Gene reported that a change was made to NitrOS-9 so DNS=3 is suggeated.
> 
> But then you may run into many .dsk on the Internet that have DNS=1. So remember to check the DNS in all disks downloaded from various parts of the Internet. 
> 
> 
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