Editing Expanded memory (section)

==Expanded Memory Adapter (XMA)==
IBM remained silent as the industry widely adopted the LIM standard.{{r|maremaa19850617}} The company developed its own memory standard called Expanded Memory Adapter (XMA); the IBM DOS driver for it is XMAEM.SYS. Unlike EMS, the IBM expansion boards can be addressed both using an expanded memory model and as [[extended memory]].<ref name="mskb"/> The expanded memory hardware interface used by XMA boards is, however, incompatible with EMS,<ref name="Welch_1986"/> but a XMA2EMS.SYS driver provides EMS emulation for XMA boards.<ref name="mskb"/> XMA boards were first introduced for the 1986 (revamped) models of the [[3270 PC]].<ref name="Welch_1986"/>