IBM PC CONVERTIBLE

0083
0083 3C 01
0085 75 03
0087 E9 0125 R
008A 3C 00
008e 74 57
008E 3C 02
0090
74 08
0092 3C 03
0094 74 15
0096 F9
0097 E9 01BD R
009A B4 10
009C E8 0000
009F
8A 08
00A1 FE C4
00A3
E8 0000
00A6
8A F8
00A8
E9 01BB R
OOAB
B4 10
OOAD 8A C3
OOAF
E8 0000 E
00B2
FE C4
0084 8A C7
00B6 E8 0000
CL: BITS 7-0 - KEYBOARD INACTIVITY TIME BEFORE SYSTEM POWER
OFF (TIME IN MINUTES, *0 = DISABLE POWER OFF).
DEFINITION OF BITS IN MODEM PROFILE REGISTER (AL = 2,3)
BL: BIT 6,7 - NOT USED.
BIT 5 - *0 = MANUAL ANSWER. / 1 = AUTO ANSWER.
BITS 4-2 - B4
B3
B2 PARITY AND FRAMING
- ---- - - - - - - - -- - - - - - - - - -------- ----
0 0 0
MARK, 7 BITS DATA
0 0
1 SPACE, 7 BITS DATA
0 1
0 ODD, 7 BITS DATA
*0
1 1
EVEN, 7 BITS DATA
1 0 0
NONE, 8 BITS DATA
1 0
1 RESERVED
1 1 0
RESERVED
1 1
1
RESERVED
BITS
1-0 -
B1
BO MODEM DATA RATE
-------- -- ---- --- ---------- -- - - - - --
o
o
*1
**1
110 BITS PER SECOND
300 BITS PER SECOND
1200 BITS PER SECOND
2400 BITS PER SECOND
*DEFAULT SETTINGS AFTER STANDY POWER LOST
**NOT PRESENTLY SUPPORTED
BH: RESERVED FOR FUTURE USE.
OUTPUT: AL = 80H IF MODEM CANNOT BE CONFIGURED OR IS NOT PRESENT.
AL = OOH IF MODEM CONFIGURATION IS PERFORMED OK.
AL UNDEFINED FOR OTHER FUNCTIONS.
REGISTERS
MODIFIED: AX
SYS_PROF
PROC NEAR
CMP AL,l
IS REQUEST FOR MODIFY?
JNE SYS1
JMP
SPROF _MODI FY
YES,
GO SYS PROF MODI FY •.
SYS1 : CMP AL,O NO,
REQUEST FOR SYS READ?
JE SPROF _READ YES,
EXECUTE SYS PROF READ ..
CMP
AL,2
NO, IS REQ FOR MODEM READ?
JE MPROF _READ YES
CMP
AL,3
NO, IS REQ FOR MODEM WRITE?
JE MPROF ...MODI FY YES
STC SET ERROR RETURN CODE
JMP
SPROF _OUT
EX IT ROUTI N E
READ MODEM PROFILE
MPROF _READ:
MOV
AH,RTCMOD_PROF1 ; ADDR PROFILE BYTE
CALL GELRTCREG READ IT
MOV BL ,AL
INC AH
ADDRESS NEXT BYTE
CALL GELRTCREG READ IT
MOV BH ,AL
JMP
SPROF _EXIT
RETURN TO CALLER
WRITE MODEM PROFILE AND CONFIGURE MODEM (IF POWER ON)
MPROF ...MODI FY: MOV
AH,RTCMOD_PROF1 ; ADDR PROFILE BYTE
MOV AL, BL
CALL PULRTCREG WRITE IT
INC AH
ADDRESS NEXT BYTE
MOV AL,BH
CALL
PULRTCREG PROFILE IS NOW STORED
2-174 ROM BIOS