(
(
(-\
(
Printer Format
If
the data in the
I/O
buffer
is
in printer format, the data
is
in 5100 intemal code.
If
no error occurred, the buffer
is
all hex
zeros.
Interchange Format
If
the data in the
I/O
buffer
is
in interchange format,
it
is
in
5100 internal code
and
contains
from
part
of
one logical
record
to
multiple logical records.
Hex
E3
indicates the
end
of
meaningful data in the buffer.
Hex
Displacement
0-3
4
5
6-7
a-variable
Variable
Length
4
2
Number
specified in
bytes 6
and
7
Variable
Form
Binary
Binary
Binary
Binary
Variable
I nternal Format
If
the
dCilta
in the
I/O
buffer
is
in internal format,
it
con-
tains
from
part
of
one logical record
to
mUltiple logical
records. An end
of
recprd word, hex
FF0\50E;04,
oCQUrs
after
each
logical record. This word should
appe~r
just
before the 4.byte len\lth word
of
the
rl(~xt
logical record.
Using this length word, you should find another
end
of
record word. This will verify that you
have
found a valid
logical record.
The
i!,\ternal format is:
Description
Length
of
thl;!
logiclil
rli!~9rd
minus
these
4 bytes.
Format
of
the data:
Hex
01
- Boolean (logical)
Hex 02 - Integer
Hex 03 -
Floatin~
point
Hex
04
- Charaoter
Re~erVl!d.
Number
of
dimensions (rank) times 4.
Oimension (shapll)
of
the vector. There
is
a
4·byt~
entry
for
each
dimension, which
cOnt~in$
the number
of
elements
in
that
dimension.
Oata
in the format specified in byte
4:
Boolean (logical)
~
binary
Integer - 4 bytes per
intElger
Character - 1 byte per character Ilnd
is
IItored in Z code
(see
Z Corie)
Floating
point
- 8
byte~
per number
(see
APL Floating-
Point Format)
Language Support 6-9
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