IBM PC CONVERTIBLE

(AH) =14H LCD REQUEST
LOAD LCD CHARACTER FONT / SET LCD HIGH INTENSITY
SUBSTITUTE
(AL) = 0 - LOAD USER SPECIFIED FONT
(ES) - SEGMENT ADDRESS OF USER CHARACTER TABLE
(01) - OFFSET TO FIRST CHARACTER TO BE STORED
(CX) - NUMBER OF CHARACTERS TO STORE
(1 - 256) VALUE CHECKED
(DL) - CHAR OFFSET INTO RAM FONT STORAGE
(BH) - NUMBER OF BYTES PER CHARACTER
(1 - 255) VALUE CHECKED
(BL) - 0 = LOAD MAIN FONT (BLOCK 0)
1 = LOAD ALTERNATE FONT (BLOCK 1)
2 -
255 = NO OPERATION
(AL) = 1 - LOAD SYSTEM ROM DEFAULT FONT
(BL) - 0 = LOAD MAIN FONT (BLOCK 0)
1 = LOAD ALTERNATE FONT (BLOCK 1)
2 -
255 = NO OPERATION
(AL) = 2 -SET MAPPING OF LCD HIGH INTENSITY ATTRIBUTE
(BL) - INTENSIFY MAPPING INPUT REGISTER
o = IGNORE HIGH INTENSITY ATTRIBUTE
1 = MAP HIGH INTENSITY TO UNDERSCORE
2 = MAP HIGH INTENSITY TO REVERSE IMAGE
3 = MAP INTENSITY TO SELECT ALTERNATE FONT
4 - 255 = NO OPERATION
(AL) = 3 - 255
NO OPERATION
(AH) =15H PHYS I CAL 01 SPLAY DESCRI PTI ON PARAMETER REQUEST
RETURNS THE ADDRESS OF A 7 WORD TABLE WHICH CONTAINS
THE DESCRIPTION PARAMETERS OF THE CURRENT DISPLAY.
IT ALSO RETURNS THE MONITOR NUMBER OF THE ALT DISPLAY
ON EXIT:
(ES:
01) = POINTS TO A 7 WORD PARAMETER TABLE
AX = MONITOR NUMBER OF ALT DISPLAY. IF THERE IS
NO ALTERNATE DISPLAY OR THE ALT DISPLAY IS
INOPERATIVE THEN AX = O.
THE 7 WORD TABLE CONTAINS THE FOLLOWING INFOMATION:
WORD I N FORMATION
1 MONITOR MODEL NUMBER (5140,5153,5151)
2
NUMBER OF VERTICAL PELS / METER
3 NUMBER OF HORIZONTAL PELS / METER
4 TOTAL NUMBER OF VERTICAL PELS
5 TOTAL NUMBER OF HORIZONTAL PELS
6 HORIZONTAL PEL SPACING IN MICROMETERS
(CENTER TO CENTER)
VERTICAL PEL SPACING IN MICROMETERS
(CENTER TO CENTER)
DISPLAY TYPES AND TABLES
WORD MONOCHROME
CGA LCD AS CGA LCD AS MONO
------------------------------------- --- - --- - - ----- - - - --
1
5151 HEX
5153 HEX 5140 HEX 5140 HEX
2 0 0498 HEX 08El HEX 0
3
0
OA15 HEX
0987 HEX
0
4 0
00C8 HEX
00C8 HEX 0
5
0 0280 HEX
0280 HEX 0
6
0 0352 HEX 01BB HEX
0
7 0 0184 HEX 019A HEX 0
; *****************************************************************
;* S TAR T 0 F COD E
; *****************************************************************
ASSUME CS: ROMCODE, OS: DATA, ES: V IDEO_RAM
2-82 ROM BIOS