Re: [cbm4linux-users] a few questions

[Michael K. <mic...@pu...>]

On Fri, 9 Jan 2004, Ryan Underwood wrote:

> On Fri, Jan 09, 2004 at 02:15:58PM +0100, Michael Klein wrote:

[Warp mode description]
> > This means also that warp is generally safer than turbo, because turbo
> > doesn't catch transfer errors (data sent by 1541 != data received by PC)!
>
> Interesting!  In warp mode, does the PC retry in case of errors?  Along
> the lines of my original question, is there a particular reason _not_ to
> use warp mode under any set of circumstances?

No, at least I cannot think of one right now ;-)

> After copying some disks, I'm also wondering if d64copy tries to do
> anything about the most common forms of copy protection (1/2 track,
> missing blocks, etc).

No, the copy protection could not be stored in a .d64 anyway.
If you want to archive your originals you'll have to sixpack them on a
C64. (Some day there might be a dedicated nibbler for cbm4linux, though)

> For example, I dumped Winter Games by Epyx, which
> I was almost certain had some sort of copy protection on it.  The copy
> process completed without error on both sides, however.  (I haven't
> tested the resulting images.)

I'm pretty sure the image will not work. AFAICS, most advanced copy
protected disks can be copied without a single error message, but the
actual protection is lost of course.

> > > 3) Is there, or would it be possible to construct, a program to do head
> > > alignment of a commodore drive using a x*1541 cable and a PC?
> >
> > Absolutely possible. Anything you can do from a C64 should be also
> > doable from a Linux PC (except highly timing-sensitive drive/host
> > communication stuff).
> > For inspiration, here's a small GTK+-based tool to measure the drives
> > rotation speed:
> >
> > http://a98.shuttle.de/~michael/rpm1541/
> > (Use scratch disk!)
>
> Very cool.  Thanks for your informative reply!

You're welcome!

-- 
Michael

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