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Format of EMS frame status record

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Offset Size Description

00h

BYTE

frame type (see #01517)

01h

BYTE

owner handle (00h/FFh = none) from frame including UMB index to UMB frame descriptors

02h

WORD

logical page for frame, 7FFFh if none, FFFFh if non-EMS frame

04h

BYTE

EMS physical page number (FFh for non-EMS = don't care???)

05h

BYTE

flags for non-EMS frames (00h for EMS frame)
bits 0,1 for first 4K, bits 2,3 for second 4K, etc:
10 = direct mapping (linear address = physical address)
01 = UMB mapping