Path: utzoo!attcan!telly!lethe!torsqnt!news-server.csri.toronto.edu!rutgers!psuvax1!wuarchive!uunet!infonode!ingr!b11!gibson From: gibson@b11.ingr.com (Stan Gibson) Newsgroups: comp.periphs.scsi Subject: Re: Are CD ROM drives interchangeable? Message-ID: <9673@b11.ingr.com> Date: 14 Dec 90 17:37:14 GMT References: Reply-To: gibson@b11.UUCP (Stanley Gibson) Organization: Intergraph Corp. Huntsville, AL Lines: 16 In article tim@gumby.cs.caltech.edu (Timothy L. Kay) writes: > My question is, do CD ROM drives conform to some >common command set? For example, are they simply treated as regular >disk drives? > I have tested CDROM drives from 5~6 different vendors. They all respond to the same read command. There are some vendor unique commands. Audio commands were not standardized until SCSI II so many vendors have unique command sets for their audio functions. Some vendors use unique mode select/sense pages to alter/report their buffer configuration but you don't have to use those. Also be aware that not every vendor uses the same caddy. Most use the "Sony" type, at least one uses a variation of the sony and LMSI has their own design. As I recall their users manual had eight pages showing how to load the caddy.