IBM PC CONVERTIBLE Technical Reference page 143

OADA 5A
OADB F6 C4 29
OADE 75 13
OAEO FE C6
OAE2 3A EE
OAE4 75 BD
OAE6
OAE6 5A
OAE7 B4 02
OAE9 CD 10
OAES 26: C6 06 0000
00
OAF1 EB 14
OAF3
OAF3 5A
OAF4 B4 02
OAF6 CD 10
OAF8
OAF8 BB 0053
OAFB B9 0081
OAFE E8 0000 E
OB01 26: C6 06 0000
FF
OB07
OB07 5A
OB08 59
OB09 5B
OBOA 58
OBOB IF
OBOC 07
OBOD CF
OBOE
POP
TEST
JNZ
INC
CMP
JNE
PR120:
POP
MOV
INT
MOV
JMP
ERR10 :
POP
MOV
INT
ERR20 :
MOV
MOV
CALL
MOV
EXIT:
POP
POP
POP
POP
POP
POP
IRET
PRLSCRN
DX
AH,29H
ERR10
DH
CH,DH
PRI10
DX
AH, SELCURSOR_POS
VIDEO_FN
STATUS_BYTE,O
SHORT EXIT
DX
AH, SELCURSOR_POS
VIDEO-FN
RECALL CURSOR POSITION
TEST FOR PRI NTER ERRORS
OUT OF PAPER, I/O & TIME OUT
JUMP I F ERROR DETECTED
ADVANCE TO NEXT LINE
FINISHED?
I F NOT CONTINUE
RECALL CURSOR POSITION
TO SHOW CURSOR SET REQUEST
CURSOR POSITION RESTORED
INDICATE FINISHED
EXIT THE ROUTINE
GET CURSOR POSITION
TO REQUEST CURSOR SET
CURSOR POSITION RESTORED
BX,083 NO. CYCLES FOR 83MSEC TONE
CX,081H 1/2 CYCLE FOR 1KHZ TONE
KB_NOISE ; SOUND BEEP FOR ERROR
STATUS_BYTE,PRTSCERROR ; INDICATE ERROR
DX
CX
BX
AX
DS
ES
ENDP
; RESTORE ALL REGISTERS USED
CARRIAGE RETURN, LINE FEED SUBROUTINE
OBOE
OBOE 33 D2
OBlO 32 E4
OB12 BO OA
OB14 CD 17
OB16 F6 C4 29
OB19 75 06
OB1B 32 E4
OBlO BO OD
OB1F CD 17
OB21 C3
OB22
OB22
CRLF
XOR
XOR
MOV
INT
TEST
JNZ
XOR
MOV
INT
CRLFl :
CRLF
ROMCODE
END
2-118 ROM BIOS
PROC NEAR
DX,DX
AH,AH
AL,12Q
PRINTEfLFN
AH,29H
CRLFl
AH,AH
AL,15Q
PRINTER-FN
RET
ENDP
ENDS
PRINTER 0
WILL NOW SEND INITIAL LF ,CR
TO PRINTER
LF
SEND THE LINE FEED
TEST FOR PRINTER ERRORS
OUT OF PAPER, I/O
&
TIME OUT
EX IT I F ERROR
NOW FOR TH E CR
CR
SEND THE CARRIAGE RETURN