INT 18 - NEC PC-9800 series - VIDEO
AH = function
0Ah set video mode
0Bh get video mode
0Ch start text screen display
0Dh end text screen display
0Eh set single display area
0Fh set multiple display area
10h set cursor shape
11h display cursor
12h terminate cursor
13h set cursor position
14h read font patter
16h initialize text video RAM
1Ah define user character
???
Return: ???
Notes:  details are not available at this time
text video RAM is located at segments A000h (characters) and A200h
(attributes)


18 - NEC PC-9800 series - VIDEO