The following changes have been made:

• Added a new chapter, Optical IOCtl Device Driver Test Tool.

• Removed chapters on Device Driver Test Tools, which described the 16-bit support: DASD IOCtl, DASD ADD, SCSI IOCtl, SCSI ADD, and CD-ROM.

• Added replacement chapters, describing the 32-bit support, for DASD IOCtl and CD-ROM Device Driver Test Tools.