P.Port CD-RW Re-Write. I used it on W95/W98 no problem, load and go. Must have BIOS ECP EPP settings. Did not try yet on NT or DOS, but should work.
Will not operate on some laptops, chip set incompatability. Contact AdapTec site for laptop version drivers. Also try laptop manufacturer for new P.Port drivers. Some fixes are for a 'Go Slow' mode. These might work for otherwise incompatable laptops but data rates go down with these.