The Information Block Consistance - Sharp MZ-700 Service Manual

1 - o 1 . .
_--464~- __ ... II.oo ... _ - 4 9 .• 4j.1S----I ..
-+oI .....
240~-'- 264~'"
, I " I
I
I I , ;.' _ _ _ _ _ _ _
I
CASE1 LONG - - - - -.... - - SHORT
U
368j.1S 368j.1S
--J '
READ READ READ READ POINT
EDGE POINT EDGE
t
(Rising edge SHORT
starts sampling (HIGH) 240lls
counter) (LOW) 264lls
LONG
(HIGH) 464lls
(LOW) 494j.1S
READ POINT
368lls
"LONG"
is
the data written for the bit value of" 1" and
"SHORT" for the bit value of "0". Data is read
368~
after the rising edge of the data. The data is recorded
as a repetition of LONG and SHORT, with the same data
block written twice.
I
SHORT
10 sec
22000
TAPE
1
MARK
LONG40
SHORT40
LONG
TAPE
MARK
LONG 20
SHORT 20
INFORMATION
BLOCK
128 bytes.
1 DATA BLOCK
Check !SHORT
INFORMA·
E ..
TION
:;,a>
SHORT
sum, ~56
.....
BLOCK
~>
1
2 bytes ~ytes
u.rJ
5 sec
128 bytes
1!N
u
LONG 11000
E Xl
isHORT
E" ..
as:
DATA
:;,a>
.....
~.rJ
1 256
BLOCK
~> 1
Ibytes
u.rJ
1!N 1!N
U
U
LONG
LONG
The information block consists of the following:
Name Byte numbers End address Function Note
ATRB 1
$lOF1 Attribute
NAME 17 $1102 File name (up to 16 characters) CR (OD) at the end
SIZE 2 $1104
File byte size In
order or low and high order bytes
DTADR 2
$1106 Loading address
EXADR 2 $1108 Executing address
COMNT 124 $1170 Comment Not used
13
I