IBM System/360 Operating Guide

processing units that have 16,384 or more positions
of main storage use address IF or 5F for the 1050
console (one or the other, not both). This arrange-
ment allows for the possibility of two systems con-
nected through the channel-to-channel adapter. If,
for example, a system with 16,384 storage positions
is connected to a system with 8,192 storage positions,
both systems use IF as the address for the 1050
console. Hence, communication is provided to a
console from either system.
If a system has the 224 subchannels feature, the
console address can be IF, 5F, or DF (only one, not
any combination). The 1050 attachment can be selec-
tively assigned to be first or last in terms of multi-
plexor-channel polling priority.
Address 09 can also be used in any 2030 for the
1050 multiplexor-channel address. The desired
address is set by the Customer Engineer at instal-
lation time.
IBM 1052 Lights, Switches, and Functional Keys
The following describes the 1050 lights, switches,
and functional keys for on-line 1050 home-loop
operation.
The IBM 1052 Printer-Keyboard models that can
be used with System/360 Model 30 are:
1. Model 3 (Figure 9) is used whenever the IBM
1051 Modell Control Unit is used in the console
configuration.
2. Model 5 (Figure 10) is used with the IBM 1051
Model Nl Control Unit when 1050 I/O components
or features requiring switches (in addition to
the basic IBM 1052 Printer-Keyboard) are used
in the system.
3. Model 6 (Figure 11) is used with the IBM 1051
Model Nl. Model 6 provides switch control for
30
the basic IBM 1052 Printer-Keyboard, but it
does not provide the c<:lpability for adding more
1050 I/O devices or features that require switches.
The 1052 Model 6 can be obtained only on an "as
available" basis. (See your IBM representative.)
If the Systems Console Attachment Feature
is installed in the 1051 Model Nl and in the 1052
Model 6, certain functions are inoperative:
• When a command is sent to the Model 6 to
tab, backspace, or line feed, the 1052
spaces.
• No action occurs when a ribbon shift and
line-feed select is received by the Model 6.
• Tab, Backs pace, and Line-feed keys do not
function.
Any programs that provide for these functions
will operate, but the functions will not be per-
formed.
4. The 1052 Model 8 (Figure 12) is used with the
IBM 1051 Model N1 and replaces the 1052
Model 6 as the standard console keyboard.
Model 8 provides the basic mechanisms and
functions necessary in a system console environ-
ment. This model provides switch control for
the basic IBM 1052 Printer-Keyboard, but it
does not provide the capability for adding more
1050 I/O devices or features that require switches.
The Tab, Backspace, and Line-feed keys are
blank and the functions associated with these keys
are not provided in the 1052 Model 8. Also, no
action occurs when a ribbon shift and line feed
select is received by the 1052 Model 8. Any
problem program written to control these func-
tions will operate with. Model 8, even though the
functions are not performed. Whenever one of
the codes representing one of these functions is
sent to the Model 8, a s pace with no printing
occurs. Prefix codes are accepted by the 1051
with attached 1052 Model 8, but the prefix
character and the printable character in the pre-
fix sequence are ignored.

IBM System/360 Specifications

General

Brand	IBM
Model	System/360
Category	Desktop
Language	English