The only card I know where this worked was the U66>>>Fastrack hack. Flash Ultra BIOS to Fastrack, solder 100 ohm resistor between pin 16 and 23 on the controller chip and you are done. Have no clue whether it works on later cards. Had that hacked card on my old Celeron 300/450-BX6-II for a long time.
looking at the Maxtor u133 controller i have, and comparing it to the TX200 on promise's site, its look likt the exact same thing, to make it more intresting to me, they do not have a u133 controller. Since im not useing it anyway, im going to try to flash it to a TX20000 BIOS as is...