Suspend Nmi (Suspend) - IBM PC CONVERTIBLE Technical Reference

B9CO
BICO
0030
INCLUDE SUSPEND. INC
SUBTTL SUSPEND SYSTEM STATE
; **************************************************************************
SUSPEND
THIS ROUTINE IS ACTIVATED WHEN THE NMLFLIH DETECTES A SYSTEM SUSPEND NMI.
DATE LAST MODIFIED: 09/12/85
,
; **************************************************************************
; **************************************************************************
;LOCAL EQUATES
; **************************************************************************
PUBLIC RESUME
EXTRN COM....POWER: NEAR
EXTRN MODEM_CONFIG:NEAR
SUSPEND_COLOR
SUSPENDJ10NO
INILDISP
EQU
EQU
EQU
OB9COH
OBICOH
30H
SUSPEND SAVE AREA IN FONT
SAVE FOR WHEN IN MONO
INITIAL VIDEO BITS OF EQUIP_FLAG
TABLE OF LCD REGISTER ADDRESSES THAT MUST BE SAVED AND RESTORED
0783 LCDILTABLE LABEL BYTE
0783 010609 OA OB OC DB 1,6,9,OAH,OBH,OCH,ODH,OEH,OFH
00 OE OF
078C 12 1415 16 17 18 DB 12H,14H,15H,16H,17H,18H,19H,IAH,IBH,ICH,IDH
19 lA IB lC 10
=
0014 LCDILLENGTH EQU $-LCDIL TABLE
ASSUME OS: DATA
Suspend NMI (SUSPEND)
0797
SUSPEND PROC NEAR
0797 C7 06 0072 R 0000 MOV RESELFLAG,O
CLEAR RESELFLAG
0790
8B 16 0063 R MOV OX ,ADD1L6845
07Al 83 C2 04 ADD DX,4 OFFSET TO DISPLAY MODE ADDRESS
07A4 EC IN
AL,DX GET CURRENT MODE (LCD ONLY)
07A5 8A E8
MOV CH,AL
CH
<--
CURRENT DISPLAY MODE
07A7 BO 00 MOV AL, LCD_FUNCT
07A9 E6 74 OUT LCD_INDX,AL
SELECT LCD CONTROL REGISTER
07AB E4 75 IN AL,LCD_DATA
07AD
8A F8 MOV BH,AL BH
<---
CURRENT LCD CONTROL
07AF 24 BF AND AL,NOT PANELENABLE
TURN OFF LCD PANEL
07Bl E6 75 OUT
LCD_DATA,AL
07B3 2A DB
SUB BL, BL
BL
<---
SUSPEND ERROR FLAGS
TEST FOR LCD OPERABLE I. E. CAN BE USED AS ACTIVE OR ALTERNATE DISPLAY
07B5 B4 20
07B7 E8 0747
07BA 8A C8
07BC
F6 Cl 01
07BF 75 15
07Cl BA 03B4
07C4 BF BICO
07C7 F6 Cl 02
07CA 75 10
OlCC 24 OC
07CE 3C OC
0700 74 33
MOV
CALL
MOV
TEST
JNZ
MOV
MOV
TEST
JNZ
LCD NOT ACTIVE
AND
CMP
JE
AH, RTCDSP _CON
GELRTCNMI
CL,AL
CL, DSP _CLCD
SUS_OOO
OX, MONO_CNTL-4
01 ,SUSPEND_MONO
CL, DSP J1LCD
SUS_OOI
AL, DSP J10NO+DSP _CGA
AL, DSP _MONO+DSP _CGA
SUS_002
GET LCD CONFIG FLAG
CL
<---
RTCDSP _CON FLAGS
TEST LCD STATE
JUMP IF LCD IS CGA
ASSUME LCD I S MONO
01
<--
SAVE AREA SEGMENT
TEST LCD STATE
JUMP I F LCD I S MONO
SAVE ONLY OTHER DISPLAY INFO
ARE BOTH DISPLAYS ATTACHED?
IS SO THEN CANNOT SUSPEND
ROM BIOS 2-51