IBM PC CONVERTIBLE Technical Reference page 108

0000 MLI LABEL WORD TBL OF RTNS WITHIN VIDEO I/O
0000 0069 R OW OFFSET SELMODE
0002
OlBA R
OW OFFSET
SELCTYPE
0004 0241 R
OW
OFFSET SELCPOS
0006 0290 R OW OFFSET READ_CURSOR
0008 0703 R
OW
OFFSET REAO_LPEN
OOOA 026C R
OW
OFFSET ACLOISP_PAGE
OOOC 02F7 R
OW
OFFSET SCROLL_UP
OOOE 037A R OW OFFSET SCROLL_DOWN
0010 03B6 R OW OFFSET REAO-ACCURRENT
0012 03FC R
OW
OFFSET WRITUCCURRENT
0014 0430 R OW OFFSET WRITE_CCURRENT
0016 02AB R OW OFFSET SELCOLOR
0018 0474 R
OW
OFFSET WRITLOOT
OOlA 0463 R
OW
OFFSET
READ_DOT
001C 074F R
OW OFFSET WRITLTTY
001E 0201 R OW OFFSET VIDEO_STATE
0020 016F R OW OFFSET V IDEO_RETURN
0022 016F R
OW
OFFSET VIDEO_RETURN
0024 016F R
OW
OFFSET V IDEO_RETURN
0026 0879 R OW OFFSET WRITLSTRING
0028 0927 R
OW
OFFSET LCD_REQUEST
002A 09E6 R
OW
OFFSET PHYS_OSP _DESCR-REQ
=
002C M1L_1
EQU $-ML1
REGS_PUSHO STRUC
0000 0000 TEMPBP
OW 0
0002 0000 BP _POS OW
0
0004 0000 DLPOS OW 0
0006 0000 SLPOS OW
0
0008 0000 BLPOS OW 0
OOOA
0000
CLPOS
OW
a
OOOC 0000 OLPOS OW 0
OOOE 0000
DS_POS
OW 0
0010 0000
ES_POS OW
0
0012
0000
IP_POS
OW
a
0014 0000 CS_POS OW 0
0016 0000 FL_POS OW 0
0018
REGS_PUSHO
ENDS
002C
VIOEO_IO_1
PROC NEAR
002C 06 PUSH ES
0020
IE PUSH
OS
SAVE REGISTERS
002E
52 PUSH
OX
002F 51 PUSH CX
0030 53 PUSH BX
0031 56 PUSH
SI
0032 57 PUSH DI
0033 55 PUSH BP
0034
FB STI
0035 FC CLO
0036 50 PUSH AX SAVE AX VALUE
0037
8A C4 MOV AL,AH
GET I NTO LOW BYTE
0039
32 E4
XOR AH,AH
ZERO TO HIGH BYTE
003B 01 EO SAL AX,l *2 FOR TABLE LOOKUP
0030 8B FO MOV SI,AX PUT INTO S I FOR BRANCH
003F 3D 002C CMP AX ,M1L_1 TEST FOR WITHIN RANGE
0042 72 04 JB M2
BRANCH AROUND BRANCH
0044 58 POP AX THROW AWAY THE PARAMETER
0045 E9 016F R JMP V IDEO_RETURN DO NOTHING IF NOT IN RANGE
0048
M2:
0048 E8 0000 E CALL DDS
004B B8 B800 MOV AX ,OB800H SEGMENT FOR CGA CARD
004E 8B 3E 0010 R MOV 01, EQUIP -FLAG GET EQUIPMENT SETTING
0052 81 E7 0030 AND 01,30H ISOLATE CRT SWITCHES
0056 83 FF 30
CMP 01,30H
IS SETTING FOR MONO CARD?
0059
75 02
JNE
M3
005B B4 BO MOV AH,OBOH SEGMENT FOR MONO CARD
0050 M3:
0050 8E CO MOV ES,AX SET PTR TT V IDEO RAM AREAS
005F 58 POP AX RECOVER VALUE
0060 8A 26 0049 R MOV AH,CRLMODE GET CURRENT MODE INTO AH
ROM BIOS 2-83