Tandy 600 Programmer's Reference Manual page 92

Bios programmers
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Function
09h
-
Get
Field
Type
Parameter
Block:
00:
FILE_HANDLE
File Identifier
01:
FIELDJD
Field
Identifier
Return
Value:
AX:
STATUS
Field
Data
Typ
The
FILEHANDLE
parameter
specifies
the
file
handle
for
a previously
opened
database
file.
The FIELDID
parameter
specifies
the
field
to
be
accessed.
The
Field
Data
Type
of
the specified
field
will
be
returned
in
AX.
The
following
are the defined
field
data
types;
1
-
Character
2
-
Numeric
3
-
Date
Error
Returns:
87

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