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Appendix
Operatio n
Writing sector
S ector content
check
Track/C y linder
format
R eading drive
parameters
PL-5700 Series User's Manual
Input
AH =
03h
AL =
Number of s ectors
C H =
Track No.
C L =
S ector No.
C H =
C y linder No. Insignificant 8
C L =
bits
=
S ector No. (B its 0 - 6)
DH =
C y linder No. Significant2 bits
DL =
(Bits7-8)
Head No.
E S :BX =
Drive No. ( FDD: 00h - 01h,
Drive No. ( HDD: 80h - 81h)
B uffer address
AH =
04h
AL =
Number of s ectors
C H =
Track No.
C L =
S ector No.
C H =
C y linder No. Insignificant 8
C L =
bits
=
S ector No. (B its 0 - 6)
DH =
C y linder No. Significant2 bits
DL =
(Bits7- 8)
Head No.
Drive No. ( FDD: 00h - 01h,
Drive No. ( HDD: 80h - 81h)
AH =
05h
AL =
Track/C y linder No.
Ins ignificant 8 bits
C L =
Track/C y linder No.
S i g nificant 2 bits (Bits 7 - 8 )
DH =
Head No.
DL =
Drive No.
E S :BX =
Top address in format data
table
AH =
08h
DL =
Drive No. ( FDD: 00h - 01h,
Drive No. ( HDD: 80h - 81h)
O
utput
C Y=
0: S u cces s f u lly completed
=
1: Error
AH =
S t a tus
C Y=
0: S u cces s f u lly completed
=
1: Error
AH =
S t a tus
C Y=
0: S u cces s f u lly completed
=
1: Error
AH =
S t a tus
C Y=
0: S u cces s f u lly completed
=
1: Error
AH =
S t a tus
When F DD drive No. specified in DL
E S:DI
Drive parameter s tarting
=
address
C H =
Ins ignificant 8 bits in 10 bit
value for max. number of tracks
C L =
B its 7 & 6: Ins ignificant 2 bits
in 10 bit value
for max. number of
DH =
tracks
DL =
B its 5 - 0: Max. number of
B L =
s ectors per track
Max. number of heads
Number of built-in floppy dis k
drives
B its 3 - 0: C MOS valid drive
type value
B its 7 - 4: F ixed to 0
When HDD drive No. specified in DL
C H =
Max. number of cylinders
C L =
Max. number of usable s ectors
and Significant bit in max.
DH =
number of cylinders Max.
DL =
number of usable heads
Number of built-in hard dis k
drives
App-23
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