INT 10 - VIDEO - GRAPH-MODE CHARGEN - SET USER GRAPHICS CHARACTERS (PS,EGA,VGA)

	AX = 1121h
	ES:BP -> user table
	CX = bytes per character
	BL = row specifier
	    00h user set
		DL = number of rows
	    01h 14 rows
	    02h 25 rows
	    03h 43 rows
Return: AL = new number of rows (Diamond Stealth64 Video)
Note:	this function is meant to be called immediately after a mode set;
	  results are unpredictable at other times
SeeAlso: AX=1120h,AX=1122h,AX=1123h,AX=1124h,AX=1129h"Compaq"
SeeAlso: AX=1129h"Diamond",INT 1F"SYSTEM DATA",INT 43"VIDEO DATA"