Jerome Fine replies: I have never found a CDROM that was usable - never tried that hard. I have had good experience for disk drives with the CQD-220/TM and a friend of mine with the UC07 (if I remember the number - I don't think it was the UC02, but I could be wrong). The Dilog SQ706A did not work, but that was 15 years ago when it was brand new and there was a firmware bug - which Dilog knew about, but would not fix promptly enough to use. Actually the CQD220/TM had the same firmware problem, but I had a fixed working EPROM with the revised firmware in 2 weeks! In both cases, the bug was a buffer which overlapped a 256 KByte boundary in physical memory on the Qbus. Since my test program used 6 * 24 KByte buffers, there was a high probability that one buffer would overlap a 256 KByte boundary. Sincerely yours, Jerome Fine -- If you attempted to send a reply and the original e-mail address has been discontinued due a high volume of junk e-mail, then the semi-permanent e-mail address can be obtained by replacing the four characters preceding the 'at' with the four digits of the current year.