[iyonix-support] Re: CDROM oddities
- From: cj <chris@xxxxxxxxxxxxxxxxxxxx>
- To: iyonix-support@xxxxxxxxxxxxx
- Date: Fri, 11 Apr 2014 12:10:52 +0100
In article <53f696e7bcjcgl@xxxxxxxxxxxxxxx>,
Jim Lesurf <jcgl@xxxxxxxxxxxxxxx> wrote:
> Is the 'card = 3' value an indicator of such problems? I'm
> wondering how the programmer can tell without simply trying the CD_
> swis and seeing if they fail.
The various parameters returned in the 'device' from the SWI
convert_drive_to_device should be transparent to the programmer. You
fill the 5 integer block using the appropriate rotates and masks, and
pass the address of that block in the call to CD_ReadAudio. I do that
in my ripper and have never had any problems. There are still a few
people out there who use it and it works for them.
I use oslib, but the code should be somewhat similar.
-------------------------------------------------------
void cdread_init ( int cdfs_log_no )
{
int device ;
device = cdfs_convert_drive_to_device ( cdfs_log_no ) ;
gv.cd.cd_cblk.reserved[0] = device & 7 ;
gv.cd.cd_cblk.reserved[1] = (device>>3) & 3 ;
gv.cd.cd_cblk.reserved[2] = (device>>5) & 7 ;
gv.cd.cd_cblk.reserved[3] = (device>>8) & 0xFF ;
gv.cd.cd_cblk.reserved[4] = (device>>16) & 0xFFFF ;
return;
}
----------------------------------------------------------
This sets up the block ready for calls to cd_read_audio.
In my code, I see I only read one block at a time.
--
Chris Johnson
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