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15F200CX454D

Category: memory management

INT 15 - Tandon memory mapper - Tandon MAPPER HARDWARE INITIALIZATION CHECK ???

	AX = F200h
	CX = 454Dh
Return: CF clear if hardware already initialised
	    BX = upper RAM areas in use
		bit 0: C000-C3FF
		bit 1: C400-C7FF
		...
		bit 11: EC00-EFFF
	CF set if hardware not initialised yet

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