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Values for special flag PSP segments

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Value Description

0000h

free

0006h

DR DOS XMS UMB

0007h

DR DOS excluded upper memory ("hole")

0008h

belongs to DOS

FFF7h

386MAX v6.01+ ???

FFFAh

386MAX UMB control block (see #01477 at AX=4402h"386MAX")

FFFDh

386MAX locked-out memory

FFFEh

386MAX UMB (normally immediately follows its control block)

FFFFh

386MAX v6.01+ device driver