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KC
AE
AF
B8
B9
BA
1-24 (7/69)
0-7 Previous file
o~eraticn
0
.Read back check interlock
1
Recalibrate sequence bit
2
Unequal-adaress compare (X)
3
Access busy
<~>
4
~rang-length
record Cw>
5
Any disk err condition CY)
6
Disk error CV>
7
Not ready
(N)
O
I/O check-stop switch
1
Net used
2
Expanded print-edit feature
3
Period-corrma inversion
(World Trade only)
4
Column binary feature
5
No punch tuffer
6
Model-G err-ulation
7
51-column cards
Usage of bits 5, 6, and 7 when
using 2540 as 1442:
5
Simulate read and punch in
san:e card
6
Select read-error card to
pocket .R2
7
Use 2540 as 1442
0
Alternate read rrode
1
120-print position printer
2
Tape erase Cini tialized
off)
3
Alternate 9-track tape
4
Tereporary Status
5
Channel printer
6-7 Sterling feature (World
Trade only)
0
1
2
3
4
5
6
7
system/360 tape drive 0 is
a 9-track unit
System/360 tape drive 1 is
a 9-track unit
System/360 tape drive 2 is
a 9-track unit
System/360 tape drive 3 is
a 9-track unit
systerr/360 tape drive 4 is
a 9-track unit
System/360 tape drive 5 is
a 9-track unit
System/360 tape drive 6 is
a 9-track unit
Systern/360 tape drive 7 is
a 9-track unit
KD
BB
0
1
2
3
4
5
6
7
O=O tape drive 0=800 bpi
density 0=1--1600 bpi
1=0 tape drive 1=800 bpi
density 1=1--1600 bpi
2=0 tape drive 2=800 bpi
density 2=1--1600 bpi
3=0 tape drive 3=800 tpi
density 3=1--1600 bpi
4=0 tape drive 4=800 tpi
density 4=1--1600 bpi
5=0 tape 5=800 bpi density
5=1--1600 tpi
6=0 tape drive 6=800 bpi
density 6=1--1600 bpi
7=0 tape drive 7=800 bpi
density 7=1--1600 bpi
KE-KF EC-BF Working Storage
1.5.2 AUXILIARY STORAGE MODULE 1 (1400
COMPATIBILITY)
Rows 0-7(7):
Punch Image Buffer, Crow
form)
Rows 7(8)-E:
PFR Image Buffer, Crow form)
Row F:
(F6-FF) Logout area for card read
errors.
1.5.3 AUXILIARY STORAGE MODULE 2 (1400
COl-JPATIBII.ITY)
Row O; Tens Conversion Constants:
This row
provides tens conversion for translating
BCD to EBCDIC.
OA through OF contain
invalid digit values.
Rows 1, 2, and 3; Bvtes 0 and 1; Index
.Register
~ddresses:
These three halfwords
give the addresses for the index registers
for the tens character zones A, B, and AB
respectively.
Rows 1-A, Bytes 8-F; Hundreds, Thousands
and Bias Conversicn Tatle:
The values in
this table are determined by the sizes of
the 1401/1460 or 1440 being emulated and
the size of the 2025 program storage area.
Entry into the table is according to
hundreds and hundreds zones (thousands).
Thus, the result from the table solves
hundreds, thousands, and bias translation
sirrultaneously.
The halfword at 16 is an
extension of the table and is used to
translate the / character.
Row B; Hexadecimal-to-Decirral conversion
Table:
This row gives the decimal
equivalent of the second crder hex digit
value.
Rows C through F; Operation Code Decode
~:
These four rows provide the
translation of 1401/1460 and 1440 operation
codes to a bit significant form that is
usable by the 2025.
In the chart (Figure
1-28), the 1400-series op-code is shown in
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