Table of Contents
Advertisement
Table 3.
Character Coding
ALPHAMERIC
DATA
Character
Core Storage
Printer Output
Alpha.
Num.
( Print Alphamerically )
(Blank)
C
C
blank
• (period)
C
C
21
)
C
4
)
+
1
C
+
S
1
C
21
S
*
1
4
*
- (hyphen or minus)
2
C
-
/
2
1
/
, (comma)
2
C
21
(
2
4
(
=
C
21
C
21
=
@
C
21
4
@
A
4
1
A
I
4
C8
1
I
0(-)
C 4 1
C
-
J
C 4 1
1
J
R
C41
C8
1
R
S
C 42
2
S
Z
C 42
C8
1
Z
0
421
C
0
9
421
C8
1
9
' * '
C
C8 2
terminates
$
C
C8421
terminates
NUMERICAL
DATA
Character
Core Storage
Printer Output
Print Numerical
Printer Dump
0,1,2, •••• ,9
C, .... ,CI8
0, •••• ,9
0, •••• ,9
numerical blank
C84
blank
@
record mark
C82
terminates
::j:
(=1=)
group mark
C8421
terminates
G
($)
0,1, .... ,9
F,CF1, .... ,F18
-,J, ....
,R
-,J, ....
,R
(flagged)
numerical blank
F84
blank
*
(flagged)
record mark
F82
terminates
W
(flagged)
group mark
F8421
terminates
X
(flagged)
1311
Disk Storage
Drive
Instructions
The 1311 publication referred to on the cover page
of this manual contains complete 1311 details. The
format for disk storage instructions (Figure 47) is
the same as for other 1620 operations and consists
of a 2-digit Op code, a 5-digit P address, and a 5-digit
Q
address. (The P-address must be even.)
The Qs Q9 digits of the instruction must contain
07 and the
Qll
digit must contain a modifier digit to
define a particular function within the regular Read
Numerically or Write Numerically operation. The
general areas of function definition are as follows:
1.
Read or write a specified number of data
sectors.
2.
Read or write one full disk track, both data
and sector addresses.
3.
Read data from disk storage and compare it
with the data in core storage from which it
was written.
4.
In any of the above functions, the
Qll
code
also specifies whether or not the correct length
of the record read or written is checked.
Disk Control Field
The disk control field which must be located at an
even address is a 14-digit field that specifies the disk
address where the data is to be read from or written
to, the disk storage drive to be used, and the number
of sectors to be read from or written to (Figure 48).
The number of positions in core storage reserved for
the data field must be large enough to contain all the
data read from the disk. A group mark at the end of
this field defines the total length of the area reserved
for data.
The sector address contains the disk address of
the data to be read or written. If more than one
sector is read or written, the address of the first
sector is specified.
P Address
Address
of
Disk
Control Field
Figure 47.
1620 Instruction Format
Q
Address
Modifier
43
Advertisement
Table of Contents
