Function 0Ah	Write Character - display character(s) (use current attribute)

entry   AH      0Ah 

	AL      ASCII code of character to display 

	BH      display page - text mode 

	BL      color of character (graphics mode, PCjr only) 

	CX      number of times to write character 

return  none 

note 1) CX should not exceed actual rows availible, or results may be erratic 

     2) All values of AL result in some sort of display; the various control 

	characters are not recognized as special and do not change the current 

	cursor position 

     3) If used to write characters in graphics mode with bit 7 of AH set to 1 

	the character will by XORed with the current display contents. 

     4) In graphics mode the bit patterns for ASCII character codes 80h-0FFh 

	are obtained from a table. On the standard PC and AT, the location is at 

	interrupt vector 01Fh (0000:007C). For ASCII characters 00h-07Fh, the 

	table is at an address in ROM. On the PCjr the table is at interrupt 

	vector 44h (0000:00110) and is in addressable RAM (may be replaced by 

	the user) 

     5) In EGA in graphics modes, replication count in CX works correctly only 

	if all characters written are contained on the same row 

     6) All characters are displayed, including CR, LF, and BS