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AX = 37DEh
BX = 899Dh ('DI' + 'ET')
Return:
AX = 0000h
CX = EMS status
0000h not used
0001h used as work area
0002h used for code and as work area
DX = EMM handle when EMS is in use
Category: File/Disk Compression - Int 21h - D

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