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SYSTEM DESCRIPTION
24.3 -- Record Structure
TO 11oUls:
--------------.----------------
/
/
-------------
: 0 I Be I
DATA
: CK : CR I
------------------------------/ /-------------
The symbols take on the following meanings:
Symbol
Meaning
o
The binary record
header
character
"0"
( $44>.
Be
A one bqte "byte count" that contains the
number-
Or
data
byt~s
in the
record
plus
one (for the checksum byte).
DATA
A
maximum
of
254
(decimal) data
bytes.
An~
eight-bit values are
valid
for
the
data bytes.
CK
The
twa's-complemented
sum
of
the
byte
count and all data bytes.
CK
is
a
one
byte field.
CR
The'
terminating
carriage
r~turn.
For
non-diskette devices this
will
actually
be a carriage return.
line feed,
and null
sequence.
Since diskette riles
contain
the
logical
end-of-file
indicator in the
RIB,
the
bin~ry
EOF record only will be seen
on non-diskette deviceso
The
binary
EOF
record
has
the
following format:
; E I
Be :
C~
: CR :
The
symbol "E" is the end-or-file record header
which
is the
letter liE" ($45>.
The other symbols
are the
same as
in
the
above
table.
The
EOF record has no data bytes.' Thus,
the
byte count will be equal to one.
24.3.2 ASCII records
ASCII records are used primarily
ror
source
riles
on the
diskette;
however,
EXbug-loadable format riles are ASCII even
though they are object files output from
the
assemblers
or
Linking
Loader.
ASC
I Ire cor d s con t a inn
0
r e cor d h
e
a d
e
1" S ,
b Y tee
0 U
ii
t s,
0
r
)
Page
24-12
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