Category: <b>memory management</b>
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<pre><b>INT 67 - Nanosoft MD386 - ENABLE/DISABLE MEMORY WRITE PROTECTION</b>

	AX = 5E03h
	BL = register map set number
	BH = new state (00h read-only, else read-write)
	CX = linear page number (linear address SHR 12)
Note:	setting write protection in map set 0 will cause the setting to become
	  the default for newly-allocated map sets
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