INT E0 - REAL/32 - "C_READ" - FETCH CHARACTER FROM THE DEFAULT CONSOLE

	CL = 01h
Return: AX = character
	may destroy SI,DI???
Notes:	this function echos the character to the screen, expanding Tab
	  characters to the next multiple of eight columns; Ctrl-C is
	  ignored if the calling process can not terminate
	the calling process is suspended until a character is available; if
	  the caller does not own the console, it is suspended until it
	  can attach to the console
SeeAlso: INT E0/CL=02h,INT E0/CL=06h,INT 21/AH=01h