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
Page of GC20-1801-10 As Updated March 3, 1980 by TNL GN25-0Tlb RDEVICE Macro
1M AGE=imagelib
is the image library to be used by the 3800 printer device after a
cold start if none is specified on the STABT command. If this
operand is omitted, the default is IMAG3800. CHARS=ffff
is 1 to 4 characters that represent the character arrangement table
for the 3800 printer device to be used after a cold start if none
is specified on the START command. If this operand is omitted, the
default is GF10. DP MS IZE=n
is the maximum size of the delayed purge queue for the 3800 printer
device to be used after a cold start if none is specified on the START command. If this operand is omit ted, the defa ult is 1. (The
maximum allowed is 9.)
FCB=lpi
is the FCB to be used for the page separator (6, 8, or 12) for the 3800 printer device after a cold start if none is specified on the START command. If this the 6. The following examples illustrate the use of the RDEVICE macro
instructions to describe a 1403 printer with the Universal Character Set (UCS) feature, four 9-track, 800 bpi tape drives, and eight CPT-TWX
lines on a 2702. RDEVICE ADDRESS=00E,DEVTYPE=1403,FEATURE=UNVCHSET, CLASS = (A, C) RDEVICE ADDRESS=(OCO,4) ,DEVTYPE=2401 RDEVICE ADDRESS=(030,8),DEVTYPE=2702,ADAPTER=TELE2, SETADDR=2
The RDEVICE macro instruction generates an entry in a table of printers
or a table of punches or a table of readers for spooling when
DE V T Y P E= 1 403 , 3 203 , 3 2 1 1 , 1 4 4 3 , 25 4 0 P , 3 52 5, 2 5 40 R , 3 505 ,or 2 5 0 1 is
specified. Each table has a maximum of 32 entries; one of the following
messages results if more than 32 readers, printers, or punches are
specified. MORE THAN 32 READERS MORE THAN 32 PRINTERS MORE THAN 32 PUNCHES If any of these messages prints, it indicates that the RDEVBLOK is
generated, but no entry is made 1n the printer or punch table; the
device cannot be used for CP spooling. 150 IBM VM/370 Planning and system Generation Guide
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