INT 11 - BIOS Equipment Determination / BIOS Equipment Flags

	no input data

	on return:
	AX contains the following bit flags:

	│F│E│D│C│B│A│9│8│7│6│5│4│3│2│1│0│  AX
	 │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ └──── IPL diskette installed
	 │ │ │ │ │ │ │ │ │ │ │ │ │ │ └───── math coprocessor
	 │ │ │ │ │ │ │ │ │ │ │ │ └─┴────── old PC system board RAM < 256K
	 │ │ │ │ │ │ │ │ │ │ │ │ │ └───── pointing device installed (PS/2)
	 │ │ │ │ │ │ │ │ │ │ │ │ └────── not used on PS/2
	 │ │ │ │ │ │ │ │ │ │ └─┴─────── initial video mode
	 │ │ │ │ │ │ │ │ └─┴────────── # of diskette drives, less 1
	 │ │ │ │ │ │ │ └───────────── 0 if DMA installed
	 │ │ │ │ └─┴─┴────────────── number of serial ports
	 │ │ │ └─────────────────── game adapter installed
	 │ │ └──────────────────── unused, internal modem (PS/2)
	 └─┴───────────────────── number of printer ports


	- bits 3 & 2,  system board RAM if less than 256K motherboard
	    00 - 16K		     01 - 32K
	    10 - 16K		     11 - 64K (normal)

	- bits 5 & 4,  initial video mode
	    00 - unused 	     01 - 40x25 color
	    10 - 80x25 color	     11 - 80x25 monochrome


	- bits 7 & 6,  number of disk drives attached, when bit 0=1
	    00 - 1 drive	     01 - 2 drives
	    10 - 3 drive	     11 - 4 drives


	- returns data stored at BIOS Data Area location 40:10
	- some flags are not guaranteed to be correct on all machines
	- bit 13 is used on the PCjr to indicate serial printer