[vcf-midatlantic] Strange Commodore 1581 floppy drive issue

Russell LeChard russell.lechard at gmail.com
Mon May 16 17:01:15 UTC 2022


   Thank you Sir for your advice with this 1581  IEC buffer Fix. I'll do
some more testing with the drive before going down the
Desoldering/Soldering of IC's rabbit hole. Unfortunately I have Cerebral
Palsy with some mobility issues that affects my arm/hands (I have one good
hand to work with)  Desoldering/Soldering has always been a challenge.
However, I'm only a 30 minute drive to VCF East HQ at InfoAge in Wall, NJ
to get some assistance with a Desoldering/Soldering expert at one point, if

Also, Thank you for the update on the RETRO Innovations Shipping Delays. I
was not aware until now. No worries. I hope COCOfest was good this past


Very good observation on your part. My initial testing was done with a HD
disk, not a DS/DD( it was all I had on hand over the weekend/ I could not
remember what the 1581 drive actually took.)  I need to find my box of  DS/DD
disks from my Zenith Data Systems SuperSport laptop to do more additional
testing with the 1581. Thank you for the clarification on the correct disk
type for the 1581. Funny thing is both the c64c and the c128 formatted the
HD disk in the 1581 drive without any complaining it was wrong.

Take Care,
Russell LeChard

Email - Russell.LeChard at gmail.com

On Mon, May 16, 2022 at 12:18 PM Bryan Pope via vcf-midatlantic <
vcf-midatlantic at lists.vcfed.org> wrote:

> Good afternoon Russell,
> Just making sure to cover all the bases - are the 3.5" floppy disks you
> used in the 1581 DS - *DD*, not HD?
> Cheers,
> Bryan
> On Mon, May 16, 2022 at 11:03 AM Russell LeChard via vcf-midatlantic <
> vcf-midatlantic at lists.vcfed.org> wrote:
> > Good Morning All. I am seeking some help from some Commodore experts
> with a
> > Commodore 1581 floppy Disk drive.
> >
> > Some background:
> >
> > I've been an IT specialist specializing in IBM and compatible PCs since
> the
> > early 90's. However, I started my computing journey with the TRS-80 model
> > III and  Commodore 64. I fell in love with the C64, and it began my start
> > in a very successful career in IT. (see attach photo of my c64 setup in
> > 1986 LOL)
> >
> > Recently I was lucky enough to find a C64C, a C128, and a 1581 3.5 floppy
> > drive online for a reasonable price. Well, I did pay a premium for the
> > 1581, but I never had one back in the day and well, I treated myself..
> >
> > This past weekend I tested all 3 items and for the most part all worked
> OK.
> > I was concerned the most about the 1581 working. After a delay in
> > remembering the correct syntax for the C64 format disk command (open
> > 15,8,15,"N0:testdisk,01": close15) - My memory isn't what it was in my
> > younger days! LOL :-D), I was able to format a disk and then save a
> simple
> > basic prg to it. However, when I try to load this basic prg (on the C64),
> > it locks up the c64 and there seems to be no activity led lights and the
> > 1581. I need to reboot the C64.
> >
> > Now, I tried the same task using the c128 and the same 1581 and floppy
> > disk, I can now format, save, and load a basic prg without any issues.
> > Everything seemed to work fine. My question is, are there any known
> > compatibility issues between the C64C and the 1581 that the c128 fixed? I
> > always thought the 1581 was compatible with the C64 and c64C? Very
> Strange.
> > Any thoughts and advice are welcome.Thank you in advance.
> >
> > Take Care,
> > Russell LeChard
> >

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