INT 2F - AVATAR(Advanced Video Attribute Terminal Assembler and Recreator) A set of control codes which may be used to affect the output of characters to the screen on systems equipped with an appropriate driver.	 Similar in intent to ANSI sequences, AVATAR has shorter command sequences and provides additional PC-specific functionality. AVATAR is primarily used by the Opus and Maximus bulletin board systems (it was designed by one of the developers of the Opus system)..SYS - SET DRIVER STATE
	AX = 1A21h (AL='!')
	DS:SI -> command string with one or more state characters (see #02736)
	CX = length of command string
Return: CF set on error (invalid subfunction)
	CF clear if successful
Note:	the characters in the state string are interpreted left to right, and
	  need not be in any particular order
SeeAlso: AX=1A00h/BX=4156h,AX=1A3Fh


(Table 02736)
Values for AVATAR(Advanced Video Attribute Terminal Assembler and Recreator) A set of control codes which may be used to affect the output of characters to the screen on systems equipped with an appropriate driver.	 Similar in intent to ANSI sequences, AVATAR has shorter command sequences and provides additional PC-specific functionality. AVATAR is primarily used by the Opus and Maximus bulletin board systems (it was designed by one of the developers of the Opus system)..SYS state characters:
 'a'	activate driver
 'd'	disable driver
 'f'	use fast screen output
 'g'	always convert gray keys (+ and -) to function keys
 'G'	never convert gray keys
 'l'	convert gray keys only when ScrollLock active
 's'	use slow screen output
 't'	Tandy 1000 keyboard (not yet implemented)