CD_FRAMES
if (lba < 0 || ra.nframes <= 0 || ra.nframes > CD_FRAMES)
sector = min * CD_SECS * CD_FRAMES + sec * CD_FRAMES + frame;
sector = min * CD_SECS * CD_FRAMES + sec * CD_FRAMES + frame;
*m = lba / (CD_SECS * CD_FRAMES);
lba %= (CD_SECS * CD_FRAMES);
*s = lba / CD_FRAMES;
*f = lba % CD_FRAMES;
return (((m * CD_SECS) + s) * CD_FRAMES + f) - CD_MSF_OFFSET;