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Category: vendor-specific BIOS extensions

INT 15 - Compaq Contura Aero, Contura 400 - GET SYSTEM MODEL CODE???

	AX = E800h
	BX = ??? (0000h)
Return: CF clear if successful
	    BH = 02h
	    BL = submodel??? (0Ch,0Dh,34h,38h,40h,44h,48h,64h,68h)
	CF set on error
Notes:	used by Compaq's SOFTPAQ number 0937 EPPBIOS.SYS to determine whether
	  the Enhanced Parallel Port expected by that driver is available
	used by Compaq's SOFTPAW number 0856 VOLCTRL.EXE to determine whether
	  volume control hardware expected by that driver is available

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