Re: D64 with IDE64 and a parallel connected 1541... record beaten!?
Date: 2005-11-22 18:40:13

On 2005-11-22, at 12:56, Marko Mäkelä wrote:

> On Tue, Nov 22, 2005 at 10:46:43AM +0100, wrote:
>> Zitat von
>>> - Optimised the new GCR conversion routines (about 3s gain). With  
>>> this
>>>    version I managed to make a 35 tracks d64image in 22.6s, which I
>>>    believe to be a new record on the 64! Correct me if I am wrong.
>> Never heard of "15 seconds copy"? It needs 8 secs to read a disk  
>> and 8 secs
>> to write it, without verify. What's so great about 22 secs?
> I guess "without verify" also means that the GCR data will not be  
> decoded
> (or checked for validity).

15 seconds copy's "verify option" does not affect GCR processing at  
all. It merely turns on and off re-reading of the tracks written in  
first pass and trivial checksum comparison. In any case GCR is not  

> You cannot make a sector dump ("d64image")
> without decoding the GCR data and interpreting the sector headers.

OK. Marko already mostly answered the question about what's so great ;-)

The fastest d64 creation tool I've heard of supposedly does it in  
about 20 seconds with the pc assistance and its thousands of times  
more powerful CPU. The fastest pc-less tool I've seen claims to do it  
in 25 to 30 seconds but I never managed to get a single reliable copy  
out of it.

Oh, and BTW. I did hear of "15 seconds copy"... a lot of my tool's  
code is based on its concepts! ;-)

If you are using a new Macintosh running OS X then you probably have  
[...] "daemons" (programs that hide in the background, doing things  
without the user's notice) on your computer [...]! This clearly  
illustrates that not only is Macintosh based on Darwinism, but  
Darwinism is based on Satanism. - Dr. Richard Paley

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