Extended Memory Specification (XMS) version 3.00 Extended Memory Specification (XMS) 3.0. Includes text formatted XMS versions 2.0 and 3.0, sample source code for an XMS 2.0 driver, a C library for the XMS 2.0 functions, test programs for an XMS 2.0 driver, and HIMEM.SYS version 2.04.