Re: FSD-1 & JiffyDOS
DMackey
wrote:
>Anyone know if there is a JD ROM for an FSD-1 Floppy drive? Just
>picked one up on ebay and want JD in it.
>
>TIA
It seems that the 1541-II JD ROM works perfect in my drive. :) Found
the info on Ray Carlsens page, He said something to the effect that
the FSD-1 used the 1541-II Kernel ROM so I tried the JD Kernel for the
1541-II. Works Perfect.
I programmed a 27C128 16K Eprom with the Binary from www.jbrain.net.
bluebirdpod
If you have an Excelerator PLUS FSD-2 or Oceanic 118 drive, you can
take 1541-II Jiffy Dos, build a small adapter to exchange lines D3 and
D4, and then it will work in those drives that have a garbled eprom
dump, they did this to try to hide the fact that they cloned
commodores ROM for their drive. I would have to say the FSD-2 is by
far the most compatible CLONE drive ever made.
I also have two different versions of the Enhancer 2000 drive, one
with 1541 dos, and another with their own DOS, both almost fail on all
protected software, ESP rapidlok titles, most V-max! titles wont load,
but they all work on the FSD-2
You can make the adapter to swap D3 and D4 on a eprom burner, then you
dont have to have that adapter sticking out of the bottom of the
drive, and use it to burn a 27c128 eprom, when you dump it back
without the adapter it will appear to be garbled.
but since they swapped data lines on the circuit board, it really
isnt.
Jim Brain
> On Oct 27, 12:44 am, DMackey<n2...@NOSPAMarrl.net> wrote:
>> On Tue, 19 Oct 2010 05:07:27 -0400, DMackey<n2...@NOSPAMarrl.net>
>> wrote:
>>
>>> Anyone know if there is a JD ROM for an FSD-1 Floppy drive? Just
>>> picked one up on ebay and want JD in it.
>>
>>> TIA
>>
>> It seems that the 1541-II JD ROM works perfect in my drive. :) Found
>> the info on Ray Carlsens page, He said something to the effect that
>> the FSD-1 used the 1541-II Kernel ROM so I tried the JD Kernel for the
>> 1541-II. Works Perfect.
>>
>> I programmed a 27C128 16K Eprom with the Binary fromwww.jbrain.net.
I'll add the FSD-I option in the store (it'll be a clone of the 1541-II
ROM image).
As for the FSD-2/O118 ROM, I already have the D3/D4 swapped ROM image in
my stash, and I'll make sure it's in the store.
What I can't understand is how they thought data line swapping would
keep them out of trouble. Anyone with a hex editor and a dump of the
ROM would see through that in a heartbeat.
I must conclude it was not an engineer that decided to implement it, but
rather some PHB who had read a paper about trivial obfuscation.
Jim
Gene Buckle
Jim wrote:
> From Newsgroup: comp.sys.cbm
>
> What I can't understand is how they thought data line swapping would
> keep them out of trouble. Anyone with a hex editor and a dump of the
> ROM would see through that in a heartbeat.
>
> I must conclude it was not an engineer that decided to implement it, but
> rather some PHB who had read a paper about trivial obfuscation.
>
g.
--
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Jim Brain
> To: Jim Brain
> Jim wrote:
>> From Newsgroup: comp.sys.cbm
>>
>> What I can't understand is how they thought data line swapping would
>> keep them out of trouble. Anyone with a hex editor and a dump of the
>> ROM would see through that in a heartbeat.
>>
>> I must conclude it was not an engineer that decided to implement it, but
>> rather some PHB who had read a paper about trivial obfuscation.
>>
> Did they get caught and sued by Commodore over it?
>
> g.
>
Why? Well, it further refined the legal position of ROM overlays, even
though they often contained copyrighted portion of another ROM image.
As I understand the sequence of events, the Excellerator/FSD/Oceanic
manufacture wanted maximum compatibility with the 1541, so they started
with the 1541 ROM image itself.
Commodore, who protected their drive sales very heavily, sued, and that
might be why the FSD-2 appeared. The FSD-2 used the data line swap
trick, but it didn't appease CBM. THus, the manufacturer ordered
JiffyDOS licenses for each drive sold. (THat's why some drives have a
non switchable JiffyDOS with a laser etched "JiffyDOS" notation on the
ROM. I have one of them for the collection).
Commodore continued to sue, but the manufacturer aurgued they were using
a non Commodore ROM. When CBM determined it was JiffyDOS, they
countered by noting that CMD sold ROM "overlays", which depended on the
possession of an original Commodore ROM for legal operation. Mark
Fellows took the stand to explain the concept and the agreement with
Commodore (I didn't realize it at the time, but their marketing
materials all say "ROM overlay", and that was for legal reasons). CMD
had to take the stand and note they only provided an overlay of the ROM
image, and it depended on the original image for adequate copyright
protection (the fact that the ROM overlay holds portions of the original
ROM code is a mechanical limitation of ROMs. If the JiffyDOS code could
have been swapped into place without removing the original ROMs, that
would have been done).
In the end, the court case lent more legal weight to upgrade ROMs
insofar as they were replacing an original ROM that was licensed.
Mark never told me the rest of the story, but I assume the drive
manufacturer went down in flames.
This is why I call the products "overlays" in the store and in talks.
Mark was very specific about that (though, there's no longer any CBM
wrath to find me if I goof)
Note: I could easily have gotten some of the details wrong, so I'd ask
Mark or someone else if you want perfect knowledge of the events.
Note: This means, technically, that all of those people who pitch their
original drive or KERNAL ROM when they upgrade are no longer legally
licensed to use the new drive ROM or KERNAL. So, for those like me who
held onto their original ROMs (mainly to revert the units for sale or
some collection later on), your sick twisted mentality (as if anyone is
going to swap a OEM ROM back into a 30 year old computing product) is
legitimized! Don't go scoffing at others too much, though.
Jim
Leif Bloomquist
"Jim Brain" <br...@jbrain.com> wrote in message
news:ibd96b$vj5$1...@speranza.aioe.org...
> This is why I call the products "overlays" in the store and in talks. Mark
> was very specific about that (though, there's no longer any CBM wrath to
> find me if I goof)
Yet the version of VICE in the Ubuntu software center to this day doesn't
include ROMs, instead there is dire warning about the legal risk of getting
the ROMs...
> Note: This means, technically, that all of those people who pitch their
> original drive or KERNAL ROM when they upgrade are no longer legally
> licensed to use the new drive ROM or KERNAL.
I tend to ditch mine merely because of my destructive desoldering techinque
(snip the pins, then desolder each one individually ;-)
That's a really interesting story, thanks.
-Leif
Gene Buckle
Jim wrote:
> From Newsgroup: comp.sys.cbm
>
> On 11/9/2010 9:40 AM, Gene Buckle wrote:
>> To: Jim Brain
>> Jim wrote:
>>> From Newsgroup: comp.sys.cbm
>>>
>>> What I can't understand is how they thought data line swapping would
>>> keep them out of trouble. Anyone with a hex editor and a dump of the
>>> ROM would see through that in a heartbeat.
>>>
>>> I must conclude it was not an engineer that decided to implement it, but
>>> rather some PHB who had read a paper about trivial obfuscation.
>>>
>> Did they get caught and sued by Commodore over it?
>>
>> g.
>>
> Yes. In some ways, it helped the general cause.
>
Dmackey828
wrote:
Thanks Jim,
This is the Kind of History of C= I like to read about. Sure makes for
interesting reading.