Page of GC20=1801-10 As Updated March 3, 1980 by TNL GN25-0776 RDEVICE Macro ADAPTER= BSCA IBM1 SOCC TELE2 TYPE1 TYPE2 TYPE3 TYPE4 is the terminal control or transmission adapter used to connect a
telecommunication I/O device to its control unit. This operand is
required if a DEVTYPE of 2701, 2702, 2703, 3704, 3705, or ICA is
specified, and is ignored if specified for any other device type.
BSCA specifies an IBM Binary Synchronous Terminal Adapter Type II
for a 2701, or an IBK Binary Synchronous Terminal Control Type II
for a 2703, 3704, or 3705. BSCA must be specified for remote 3270 terminals and IBK1 specifies that an IBK Terminal Adapter Type I attaches a 1050 or 21ql to a Ll01, or that an IBM Terminal I attaches a 1050 or 2741 to a 2702 or 2703, or that a Line Interface Base
Type I attaches a 1050 or 2741 to a 3704 or 3705. SDLC specifies that a 4331 Communications Adapter operate its
teleprocessing lines in Synchronous Data Link Control (SDLC) mode. ADAPTER=SDLC is valid only when you specify DEVTYPE=ICA. TELE2 specifies that a 3101 display terminal or a CPT-TWX (Models
33/35) Terminal attaches to a Telegraph Terminal Adapter Type II in
a 2701, or to a Telegraph Terminal Control Type II in a 2702 or 2703, or to a Line Interface Base Type I in a 3704 or 3705. TYPE1, specifies the channel adapter accessed by a 3704. For DEVTYPE=3705, TYPE4 should be coded. In identifying the channel
adapter, TYPE1 or TYPE4 must be specified for the Emulation Program (EP). In identifying the line adapter, IBM1, TELE2, or BSCA can be
specified only in relation to another RDEVICE macro which has ADAPTER=TYPE1, or TYPE4. SETADDR=sadnum
is the set address (SAD) command to be issued for a
telecommunication line attached to a 2702, 3704, or 3705 control
unit. This operand is required if the device is a 2702. Sadnum o
1
2
3
4 } SADZERO SADONE SADTWO SADTHREE
(no SAD command is issued)
is the 3704/3705 control program to be run
Communications Controller. EP specifies the
Emulation Program. 148 IBM VK/370 Planning and System Generation Guide
in a 3704 or 2701, 2702, or 3705 2703

Page of GC20-1801-10 As Updated March 3, 1980 by TNL GN25-0776 RDEVICE Macro ALTCU=cuu specifies an alternate control unit address to be used if paths
through the primary control unit are unavailable. cuu 1S a
three-digit hexadecimal address. Only one ALTCU can be specified.
The ALTCU cuu must specify an address with a low order address
position of 0 or 8. otherwise, the following MNOTE is issued: INVALID ALTCU ADDRESS
The ALTCU operand is only valid for tape and DASD devices. An MNOTE is issued if an invalid device type is specified. "ALTCU" IS INVALID FOR DEVICE TYPE "devtype"
The ALTCU operand should only be specified when the installation
has the string switch feature to support two control unit paths to
a device.
The ALTCU cuu address should specify the low address with the alternate real control unit. There is one occasion when
the ALTCU cuu should specify the logical control unit address. When the FEATURE=xxx-Device operand indicates that the control unit
supports more than sixteen devices and the devices on the second or
subsequent group of sixteen devices are defined by separate RDEVICE macros. The ALTCU cuu should identify the logical RCUBLOK in VM/370. VM/370 constructs one RCUBLOK for each set of sixteen
devices supported by the real control unit.
Given an alternate control unit configuration where each of two
control units support thirty-two devices, the following two macro
definitions are acceptable: RDEVICE ADDRESS=(300,32) ,ALTCU=400 RDEVICE ADDRESS=300,FEATURE=32-DEVICE RCTLUNIT ADDRESS=400,FEATURE=32-DEVICE RCHANNEL ADDRESS=3
RCHANNEL ADDRESS=4 RDEVICE ADDRESS=(300,16) ,ALTCU=400 RDEVICE ADDRESS=(410,16),ALTCU=310 RCTLUNIT ADDRESS=300,FEATURE=32-DEVICE ReTLUNIT ADDRESS=400,FEATURE=32-DEVICE RCHANNEL ADDRESS=3
RCHANNEL ADDRESS=4 CPNAME=cpname is the 1-to 8-character name of a 3704/3705 control program that
is to be automatically loaded in the 3704 or 3705 at IPL time. If
an automatic load is not desired, omit this operand.
BASEADD=cuu
is the native address (load address) of the 3704/3705 that controls
the physical line(s). This operand is required for correct
operation of VM/370 recovery management for emulation lines based
on a 370ij/3105. This operand is valid only if ADAPTER=IBM1 (or
=TELE2 or =BSCA).
CLUSTER=label
is the label of the CLUSTER macro that defines the clustered or
standalone remote 3275 or 3277 station attached to this line. This
operand is valid only if ADAPTER=BSCA is specified. Part 2. Defining Your VM/370 System 149