INT 10 - VIDEO - TOGGLE INTENSITY/BLINKING BIT (JrIBM PCjr, PSIBM PS/2, any model, TANDY 1000, EGAEnhanced Graphics Adapter(Enhanced Graphics Adapter) IBMInternational Busiuness Machines's second color video board for the IBMInternational Busiuness Machines PCIBM PC family, capable of a maximum resolution of 640x350 pixels in 16 simultaneous colors of a total of 64 possible colors., VGAVideo Graphics Array(Video Graphics Array) The video adapter introduced with the IBMInternational Busiuness Machines PS/2IBM PS/2, any model series of computers.)
	AX = 1003h
	BL = new state
	    00h background intensity enabled
	    01h blink enabled
	BH = 00h to avoid problems on some adapters
Return: nothing
Notes:	although there is no function to get the current status on adapters
	  prior to the VGAVideo Graphics Array(Video Graphics Array) The video adapter introduced with the IBMInternational Busiuness Machines PS/2IBM PS/2, any model series of computers., bit 5 of 0040h:0065h indicates the state; on the
	  VGAVideo Graphics Array(Video Graphics Array) The video adapter introduced with the IBMInternational Busiuness Machines PS/2IBM PS/2, any model series of computers., use AH=1Bh and check offset 2Dh of the returned data (see #00040)
	when configured for a monochrome display, the Boca Research Multi-EGA
	  with ROM(Read-Only Memory) A memory for program storage which may not be changed by the program as it runs. v M1.1 Type D has its screen disrupted if BH is not clear
	this call is reported to be "Get Cursor Position" on the Tandy
	  1000SL/TL
SeeAlso: AH=08h,AH=1Bh