AL subfn: 00H=Query handle directory
ES:DI addr buffer to receive data
01H=Search for named handle
DS:SI addr of 8-byte buffer containing name
02H=Count all open handles
ES:DI (fn 5400H) contains returned data (see below)
DX (fn 5401H) handle with specified name
BX (fn 5402H) count of handles; use a buffer size of BX*10
Info: This lets applications work together, sharing EMS pages, as long
as each app knows an 8-character name.
ES:DI (fn 5400H) returns with this buffer filled with EMS handle names.
+0 2 wHandle an EMM handle
+2 8 abName 8-bytes of the name
10 size of one EmsHandleNameRec
Before using fn 5400, use fn 5402H to see how large the buffer
Notes: Names can be any 8 byte. When a handle has a name of all 0s, it