Tandy 600 Programmer's Reference Manual page 88

Bios programmers
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Function
05h
-
Open
Record
Parameter
Block:
00:
FILE_HANDLE
File Identifier
01:
RECORD.
_ID
Record
Identifier
02:
ACCESS.
TYPE
= Read
Returr
i
Value:
1
=
Write
2
= Re
ad/ Write
AX:
STATUS
Error
code
The
FILEHANDLE
parameter
contains the
file
handle
for
a previously
opened
database
file.
The
RECORDID
parameter
specifies
the record
ID of the record to
open.
The
ACCESSTYPE
parameter
specifies
the type
of
access
to
be performed upon
the record
The
database
file
must have been opened
with
an access
type
that
allows the
requested
access
type.
There can
only
be
one opened
record
at
a
time.
This operation
will
fail
if
there
is
already
a
record
open,
Error
Returns:
83

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