[Coco] LSN0 C code

[Stephen H. Fischer]

Hi,

>> I wrote a shell script to allow formatting of the various lesser formats
>> while not changing the drive descriptor. (Bulk Eraser Needed!)

> That was the general idea. ;-) Just never write to a 40 track disk
> sitting in an 80 track drive, instant trash.

I had NO problem, note the use of "(Bulk Eraser Needed!)".

With a head half as wide the other half must be erased before hand. My 
friend who got the 40T disks I wrote had no problem with my disks, many 
problems with disks from others.

I do totally agree that "instant trash" would be created if I ever tried to 
write to one of his formatted 40T disks.

SHF

----- Original Message ----- 
From: "gene heskett" <gheskett at wdtv.com>
To: <coco at maltedmedia.com>
Sent: Friday, June 10, 2011 8:00 PM
Subject: Re: [Coco] LSN0 C code


> On Friday, June 10, 2011 10:54:55 PM Stephen H. Fischer did opine:
>
>> Hi,
>>
>> Works! Thanks.
>>
>> I compiled it and tried "lsn0 /d1". An 249 Error due to mismatched DNS
>> is given by "FREE /D1" or "cd /D1" while lsn0 just does it.
>>
>> Note: I am one of the very few CoCoers that had 80 Track Double Sided 5
>> - 1/4" floppy drives.
>>
> I still have a couple, even one of those 3.5 & 5.25 combo's.  I must have
> worn out the heads on at least 4 of the Tandon 100-4 drives.  Full height
> but good drives 20 years ago.
>
>> Thus I had to get DNS right on all my disks with DNS=3 and DNS=3 in the
>> drive descriptors.
>>
>> I could put ANY OS-9 disk in the drive and with the double stepping of
>> the floppy device driver all could be read with out changing the drive
>> descriptor.
>
> That was the general idea.  ;-)  Just never write to a 40 track disk
> sitting in an 80 track drive, instant trash.
>
>> I wrote a shell script to allow formatting of the various lesser formats
>> while not changing the drive descriptor. (Bulk Eraser Needed!)
>>
>> Transferring the disks to *.dsk files has been problematic as some
>> utilities convert the DNS=3 to DNS=1 and some do not causing problems.
>>
>> I added the source for lsn0.c and it's binary to SHF841.zip Plus the
>> binary for dnc (Disk name Change)
>>
>> http://home.mindspring.com/~sfischer1/
>>
>> SHF
>>
>>
>> ----- Original Message -----
>> From: "Bob Devries" <devries.bob at gmail.com>
>> To: "CoCoList for Color Computer Enthusiasts" <coco at maltedmedia.com>
>> Sent: Thursday, June 09, 2011 2:30 PM
>> Subject: [Coco] LSN0 C code
>>
>> > Since the code is quite short, I'll include it inline here:
>> --
>> Coco mailing list
>> Coco at maltedmedia.com
>> http://five.pairlist.net/mailman/listinfo/coco
>
>
> Cheers, gene