Perhaps it is TD_REMCHANGEINT? PFS3 uses DoIO(), not SendIO() like for example SFS.
Hmm.. Perhaps TD_REMCHANGEINT also always needs to be handled as IO_QUICK, this is not documented anywhere but at least SFS just SendIO()'s it without waiting for any replies.
ADDED: At least KS 3.1 trackdisk.device has special case for TD_REMCHANGEINT, it always handles it as if IOB_QUICK is set.
Last edited by Toni Wilen; 26 September 2012 at 16:09.