Function 0Eh    Write TTY - write one character and update cursor. Also handles 

		CR (0Dh), beep (07h), backspace (10h), and scrolling 

entry   AH      0Eh 

	AL      ASCII code of character to be written 

	BH      page number (text) 

	BL      foreground color (video modes 6 & 7 only) (graphics) 

return  none 

note 1) The ASCII codes for bell, backspace, carriage return, and linefeed are 

	recognized and appropriate action taken. All other characters are 

	written to the screen and the cursor is advanced to the next position 

     2) Text can be written to any CGA page regardless of current active page 

     3) Automatic linewrap and scrolling are provided through this function 

     4) This is the function used by the DOS CON console driver. 

     5) This function does not explicitly allow the use of attributes to the 

	characters written. Attributes may be provided by first writing an ASCII 

	27h (blank) with the desired attributes using function 09h, then 

	overwriting with the actual character using this function. While clumsy 

	this allows use of the linewrap and scrolling services provided by 

	this function 

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