IBM PC CONVERTIBLE

UPDATE MODE REGISTER IN RTC
080C 88 C3 BALS02 : MOV AX, BX RESTORE MODE AD DR AND DATA
080E E8 07C8 CALL PULRTC_REG
0811 E4 61 IN AL,NMLCNTL
0813 24 F7 AND AL,NOT DIS~LARM
ENABLE RTC INTERRUPT
0815 E6 61 OUT NMLCNTL ,AL
0817 IE PUSH OS
0818 E8 085C CALL DDS SET OS TO DATA SEGMENT
ASSUME DS:DATA
081B 80 OE 0016 R 20 OR
BIOS_STATUS, KYBD~CTIVE ; FORCE RELOAD OF COUNTERS
0820 IF
POP
DS
0821 C3
RET
0822
BALSALSETUP
ENDP
Keyboard I/O Entry Point
(KEYBOARD_IO)
KEYBOARD 1(0 ENTRY POINT
; *************************************
;ORG OE82 EH
082E
ORG 0082EH
= 082E KEYBOARD_IO EQU
082E E9 0000
JMP KYBD_IO
Keyboard Reset (KYBD_RESET)
0831
0831
IE
0832 07
0833 2B CO
0835 BF 0017 R
0838 B9 0027
SUBTTL KYBD_RESET
; *********************************************************************
ROUTINE-NAME: KYBD_RESET
FUNCTION: THIS ROUTINE INITIALIZES THE KEYBOARD CONTROL AREA TO A
NO KEY CONDITION.
ENTRY CONDITIONS:
PURPOSE OF ENTRY:
PERFORM KEYBOARD DATA AREA INITIALIZATION
DS:DATA, NMI MUST BE DISABLED INPUT CONDITIONS:
RESTRI CTI ONS: KEYBOARD NMI' S MUST BE DISABLED
EXIT CONDITIONS:
NORMAL EXIT CONDITIONS: KEYBOARD DATA AREA INITIALIZED
ERROR EXIT CONDITIONS: NONE
REGISTERS MODIFIED: ES,SI ,DI ,AX,CX
; *********************************************************************
KYBD_RESET
PROC NEAR
ASSUME ES:DATA,DS:DATA
PUSH DS
POP ES
CLEAR INTERRUPT AND
INTERRUPT 16 BUFFER AND CONTROL FLAGS
SUB AX,AX
MOV
DI,OFFSET KB_AREAl CLEAR KEYBOARD AREA 1
MOV CX, KB~REALLNG
2-210 ROM BIOS