RE: [9fans] CD-RW or IDE controller issues?

[iwanek@nttdata.co.jp]

anothy@cosym.net wrote:
> i've got what i believe to be an MMC CD-RW
> drive attached to the IDE chain in my
> terminal. the bios sees it fine, but it
> doesn't show up in plan 9.

I am having a similar problem. On my P4 system, #S/sdD0
is connected to a DVD-ROM and #S/sdD1 to a CD-RW. Both
drives are not detected.

I've been fiddling with /sys/src/9/pc/sdata.c and I think I found
the place: it's ataidentify() where it calls

  as = ataready(cmdport, ctlport, 0, Bsy, Drq|Err, 400*1000);

and this times out (returns -1).

I've tried increasing the magic number (400*1000) to various
values. Larger value (500*1000) sometimes works, but not
always. I am stuck.

P.S.
How can I make use of atadebug()? I put a print() in ataready()
and immediately regret it.

- kazumi