Advertisement
APPENDIX D
RDCRC
$E86F
RWTEST
$E872
RESTOR
$E875
SEEK
$E878
WRTEST
$E87B
WRDDAM
$E87E
WRVER F
$E881
Diskette Controller
Ent~y
Points
contents
or
LSCTLN.
Ir LSCTLN
contains
128
( $80 )
~
then
t his
en t1'
1J
poi n t i s
identical
to
READSC.
The restrictions
placed on LSCTLN
are
described
in
the
preceding table
g~
the parameters,
This
ent~y
point
sectors
contained
~ith
STRSCT
Trom
check their CRCs.
causes
the number of
in
NUMSCT
beginning
CURDRV
to be read to
The
contents
of
the
sectors
are
not
read into memory_
The
only parameter changed is
FDSTAT.
This entry pOint
causes
the
two
bytes
located
at the address (and at address
+
1)
contained in
CURADR
to be written into
alternating
bytes
O~
NUMSCT
sect~rs
beginning with STRSCT of
CURDRV.
ATter
NUMSCTsectors
are
written
in
this
rash
ionl
they
are
read
bac k
to
veri
ry
their
CRCs.
The only parameter
changed
is FDSTAT.
This
ent~y
point
causes
the
read/write
head
on
CURDRV
to
be
positioned
to
cylinder
zero.
The
only
paramete~
required
is
CURDRV.
The only parameter
changed is
FDSTAT.
This
ent~y
point
causes
the
read/write
head
of
CURDRV
to be positioned to the
cylinder containing
STRSCT
(see
Appendix
AL
The
only
parameter
changed
is
FDSTAT.
This
ent~y
point causes the two bytes
of
data
located
at
the
address
(and
at
address
+
1)
contained in
CURADR
to
be
written
into alternating bytes or NUMSCT
sectors beginning with
STRSCT
or
CURDRV.
The only parameter changed is FDSTAT.
This
entry
point
causes a deleted data
mark to
be
written
to
NUMSCT
sectors
beginning
ulith
STRSCT
of
CURDRV.
The
only parameter changed is
FDSTAT.
This entry point
causes
NUMSCT
sectors
beginning
at
STRSCT
or
CURDRV
to
be
written
r~om
memory
starting
at
the
address
contained
in CURADR.
CURADR is
updated to the address of the
next
byte
to
be
~ead
from memory after each
secto~
is written.
After all sectors have
been
Advertisement
