A pr 1. I, I ::r 0 , 3270s THE CLUSTER MACRO Code one CLUSTER macro for each 3271 and 3274 control unit Model 1C,
each 3276 control unit display station, and each 3275 display station. Only a maximum of 16 CLUSTER macros is allowed. Each CLUSTER macro must
have a unique label. The CLUSTER macro is described in the "preparing
the Real I/O Configuration File section of "Part 2. Defining Your VM/370 System." THE TERMINAL MACRO Code one TERMINAL macro for each display station and printer that is
attached to the clustered 3271.
Code one TERMINAL macro for each display station and printer that is attached to 3274 control unit, 1C. For a 32
70 control unit Model 1C, the TERMINAL macros for 3278s, 3287s on a Type A
adapter, and 3289s must precede the TERMINAL macros for 3277s, 3284s,
3286s, 3287 on a Type B adapt er and 3288s.
Code one TERhINAL macro for each display station and printer that is
attached to a clustered 3276. Since the 3276 contains one integral
display unit, code one TERMINAL macro for the 3276 as a 3277. Code each
3278 attached to the 3276 as a 3277, and each 3287 attached to the 3276
as a 3284 or 3286. Code each 3289 as a 3288.
Code one TERMINAL macro for the 3275 display station. If a 3284 or
3286 printer is attached to the 3275, code MODEL=3 on the TERMINAL
macro. The TERMINAL macro is described in the "Preparing the Real 1/0 Configuration File (DMKRIO)" section of "Part 2. Defininq Your VM/370 System." THE RDEVICE MACRO Code one RDEVICE macro for each binary synchronous line used for remota 3270s (code one RDEVICE macro for each CLUSTER macro you code) • A
maximum of 16 RDEVICE macros for lines to support remote 3270s is
allowed.
The RDEVICE macro is described in Part 2. However, the format of the RDEVICE macro for the binary synchronous line and transmission control
unit for remote 3270s is included here to help you code the macro
correctly. The format of an BDEVICE macro for a communication line that
supports remote 3270s is:
54 IBM VM/370 Planning and System Generation Guide

,- I Name I I L
Operation RDEVICE Operands ADDRESS=cuu, l
2701\ 2703 DEVTYPE= ICA , 3704 3705 A DAPTER=BSCA ( , BASEADD=cuu ]
, CL USTER=label 3270s ADDRESS=cuu is the real I/O address of the binary synchronous line to be used
by remote 3270s. The address, cuu, is three hexadecimal digits from 000 to FFF. 3704 3705 is the device type of the transmission control unit that controls
the line.
Note: The lines attached to the 3704/3705 must be controlled by the Emulation Program (EP). ADA PTER=BSCA
is the terminal adapter for the transmission control uni t. BSCA represents the: • IBM Binary Synchronous Terminal Adapter Type • IBM Binary Synchronous Terminal Control Type • Integrated Communications Adapter (ICA) Models 135, 135-3, and 138 • IBM 3704 and 3705 Communications Controllers
BASEADD=cuu
II for a 2701 II for a 2703 on the System/370 is the native subchannel address (load address) of the 3704/3705 that controls the physical line or lines. This operand is required
for correct operation of VM/370 recovery management for emulator
lines on a 3704/3705. Specify this operand only for 3704 and 3705. CLUSTER=label is the label of a CLUSTER macro that defines the cluster or
standalone station attached to this line. Part 1. Planning for System Generation 55