IBM PC CONVERTIBLE Technical Reference page 57

Ol7E
0180
0183
0185
0188
0188
018B
018D
0190
0193
0196
019C
019E
01A1
01A3
01A6
B4 07
E8 0000
B4 01
E8 0000
E8 0231
B4 08
E8 0000
E8 0000 E
80 C9 80
F7 06 0010
74 OB
E8 0231 R
B4 08
E8 0000
E8 0000
,
MOV AH,RECALIBRATE
CALL NECOUTPUT
MOV AH,Ol
CALL NECOUTPUT
RECAL_DONE:
CALL WAILINTRPT
MOV AH,READ_INLSTATUS
CALL NECOUTPUT
CALL RESULTS
OR CL,80H
R 0040 TEST EQUIP_FLAG,40H
JZ
NMLSEEK
CALL WAILINTRPT
MOV AH,READ_INLSTATUS
CALL NECOUTPUT
CALL RESULTS
RECAL COMMAND FOR THE FDC
OUTPUT IT TO TH E FDC
RECAL DRI VE 1
OUTPUT IT TO THE FDC
CHK FOR FDC TO GENERATE AN IRPT
READ DRIVE STATUS TO THE FOC
RECAL STATUS REQUESTED FLAG
SEE IF TWO DRIVES INSTALLED
CHK FOR FDC TO GENERATE AN IRPT
READ DRIVE STATUS TO THE FOC
;ISSUE OVERLAPPED SEEKS TO DR 0 AND IF INSTALLED
01A9
01A9 80 E1 7F
01AC B4 OF
01AE E8 0000
0181 B4 00
01B3 E8 0000
01B6 8A El
01B8 E8 0000
018B E8 0222
,
NMLSEEK:
AND CL,07FH
MOV AH, SEEK-CMD
CALL NECOUTPUT
MOV AH,OO
CALL NECOUTPUT
MOV AH,CL
CALL NECOUTPUT
CALL DROP_BUSY
;SEE IF THERE IS A SECOND DRIVE IF SO SEEK
TURN OFF THE RECAL SWITCH
SEEK COMMAND FOR THE FDC
OUTPUT IT TO THE FDC
SEEK DRIVE 0 FIRST
OUTPUT IT TO THE FDC
DR 0 TRACK TO SEEK TO
OUTPUT TO TH E FDC
CHK FOR FDC BUSY TO DROP FOR OVLP
01BE F7 06 0010 R 0040 TEST
EQUI P _FLAG, 40H
SEE IF SECOND DRIVE IS INSTALLED
01C4 74 OF
01C6 84 OF
01C8 E8 0000
01CB B4 01
01CD E8 0000
01DO 8A E5
0102 E8 0000
0105
01D5 E8 0231
0108 B4 08
010A E8 0000
0100 E8 0000
JZ
SEEK-DONE
ONLY DRIVE 0 INSTALLED
MOV
AH,SEEK-CMD SEEKL COMMAND FOR THE FDC
CALL NECOUTPUT
OUTPUT IT TO THE FOC
MOV AH,Ol
SEEK DRIVE 1
CALL NECOUTPUT
OUTPUT IT TO THE FDC
MOV AH,CH
DR 0 TRACK TO SEEK TO
CALL NECOUTPUT
OUTPUT TO THE FDC
SEEK-DONE:
CALL WAILINTRPT CHECK FOR FDC TO GENERATE AN IRPT
;GET THE STATUS OF THE SEEK AND THE TRACK VALUE RETURNED FROM THE FDC
MOV AH,READ_INLSTATUS
CALL NECOUTPUT
CALL RESULTS
; READ DRIVE STATUS CMD TO THE FDC
; OUTPUT IT TO THE FDC
; GET STO AND PCN FROM THE FDC
~IF
A SECOND DRIVE IS INSTALLED GET ITS RESULTS
OlEO F7 06 0010 R 0040 TEST EQU I P _FLAG, 40H
JZ
RESYNCOUTl
CALL WAILINTRPT
SEE I F TWO DRIVES
01E6 74 OB
01E8 E8 0231
01EB B4 08
OlED E8 0000
01FO E8 0000
01F3
01F3 5E
01F4
01F4 BO D2
01F6 E6 77
01F8 FA
01F9 5E
01FA 58
MOV AH,REALINLSTATUS
CALL NECOUTPUT
CALL RESULTS
CHECK FOR Foe TO GENERATE AN IRPT
READ DRIVE STATUS COMMAND TO FDC
OUTPUT IT TO THE FDC
GET STO AND PCN FROM FDC FOR DR 8
SETUP TO RETURN TO CALLER THE PROPER VALUE IN PORT 77H
RESYNCOUTl :
POP SI ; DISCARD FOCOUTPUT ERROR ADDRESS
RESYNCOUT2 :
MOV AL ,DSKLNMI HDCPWR+RD_CNTL +CNTLSEL ; TURN OFF DEGATE
OUT DSKLCNTL,AL
RESTORE THE USERS INTERRUPT VECTOR AND MOTOILCOUNT
CLI
POP SI
POP AX
OlFB 26: 89 44 02
01FF 58
MOV ES:[SI+2],AX
POP AX
; RETRI EVE VECTOR ADDRESS
RESTORE VECTOR SEG ADDRESS
0200 26: 89 04 MOV ES: [SI] ,AX RESTORE VECTOR OFFSET ADDRESS
2-32 ROM BIOS