Function 0C0h   Get System Configuration (XT 1/10/86+, Convert, XT/286, AT, PS/2)
entry   AH      0C0h 
return  CF      1 if BIOS doesn't support call 
	ES:BX   pointer to ROM system descriptor table 
		dword   number of bytes in the following table (norm. 16 bytes) 
		byte    system ID byte
		byte    secondary ID distingushes between AT and XT/286, etc. 
		byte    BIOS revision level, 0 for 1st release, 1 for 2nd, etc. 
		byte    feature information 
			80h     DMA channel 3 used by hard disk BIOS 
			40h     2nd 8259 installed 
			20h     realtime clock installed 
			10h     Int15f4F called upon Int09 
			08h     wait for external event supported Int15f41
			        used on Convertible; reserved on PS/2 systems 
			04h     extended BIOS area allocated at 640k 
			03h     reserved 
			02h     bus is Micro Channel instead of PC 
			01h     reserved 
			00h     reserved 
		byte    unknown (set to 0) (reserved by IBM) 
		byte    unknown (set to 0) (reserved by IBM) 
		byte    unknown (set to 0) 
		byte    unknown (set to 0) (Award copyright here) 
Function 0C0h   Get System Configuration (XT 1/10/86+, Convert, XT/286, AT, PS/2) 
note 1) Int 15h is also used for the Multitask Hook on PS/2 machines. No  
	register settings availible yet. 
     2) The 1/10/86 XT BIOS returns an incorrect value for the feature byte.