Re: [linux-minidisc] Building himdformat against libscg on MacOSX

[Adrian Glaubitz <glaubitz@physik.fu-berlin.de>]

On Fri, May 21, 2010 at 10:57:30AM +0200, Michael Karcher wrote:
> Am Freitag, den 21.05.2010, 10:04 +0200 schrieb Adrian Glaubitz:
> > Yes, Michael pointed me to that issue in the channel yesterday
> > already. I checked our documentation in the wiki [1] and it seems to
> > be wrong at this point unfortunately:
> > 
> > * C2/00: Erase HiMD
> > * C2/01: Format HiMD
> > 
> > I tried 0x00 but that didn't work. And, puzzingly enough, the original
> > himdformat which is in git/master as well, uses 0x03 to format and I'm
> > pretty sure that it worked before with (well, ok, I'm not sure whether
> > it was with a 235MB or a 1GB medium).
> 
> It's pretty convinced. The "3" is not the format subcommand, but a flags
> byte. I will add the info to the wiki soon.

Ah, that explains why himdformat failed when I tried. Thanks for
clearing that up!

> Erase HiMD as well as Format HiMD have the following syntax:
> 
> 12 bytes total.
> cmd[0] is 0xC2 - Sony Device Control (or however you call it)
> cmd[3] is the subcommand. In himdformat.c, this is 0, so it's "Erase
> HiMD"

Ok, it was set to 0x00 but that didn't work with the 1GB medium when I
tried. Are you sure that it shouldn't be:

* Format - 0x00
* Erase -  0x01

where "Format" works on 60/74/80 min media only and "Erase" works on
1GB media as well?

I have committed the changes to the code according to your
information. I didn't test the changes yet, however. I might test that
tonight to confirm.

We still need to figure out though how to get access to the HiMD
Walkman on MacOSX.

Btw, what do you guys think on implementing playback control in
QHiMDTransfer once we got sending SCSI commands working?


Adrian