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FUNCTION DCh
-
Initialize
Math Pack Area
AX
BX
CX
DX
SP:
BP;
SI:
Dl:
IP:
FLG
CS
DS
ss
ES
XXXXXXXX
XXXXXXXX
XXXXXXXX
XXXXXXXX
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Entry:
AH
=
DCh
(function
code)
BX
=
File
Handle
DX
=
Error trap vector
Exit;
AX
-
Error status
code
Function
DCh
will
initialize
the
math pack
area
in
the specified
file.
The
math pack
area
contains
working storage
used by
the
math
pack.
See
the
math pack
section
for
a
description
of
the
user accessible data items
within
the
math pack
area.
On
entry,
BX
contains the
file
handle
of
the
opened
internal
file
to
be
initialized,
DX
contains
the
offset of
an
error
handler
routine
which
will
receive
control
when
the
math pack
detects
an
error.
On
exit,
if
the carry
flag
is
reset,
the
math pack
area
was
successfully
initialized.
If
the
carry
flag
is
set,
an
error
occurred
and
the
error
code
is
in
AX.
63
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