3704/3705 Control Program Generating a VM/370 System that Supports
the 3704/3705 The generation of a 3704 or 3705 Communications Controller control program that runs under the control of VM/370 is normally done after the VM/370 system generation is completed. However, when a 3704 or 3105 is
to be generated, the following preparations must be made: • An RDEVICE macro instruction for the 3704 or 3705 must be included in
the real I/O configuration (DMKRIO) file. • 3704/3705 control programs that are to be used by VM/370 must be
stored on a CP-owned volume in the page format that is currently used
for saved virtual machine systems (that is, those created by the SAVESYS command). Each 3104/3705 control program image to be saved
must be defined by a NAMENCP macro instruction in the system name
table (CP module DMKSNT) and saved with the SAVENCP command. • Enough space to contain the 3704/3705 control program image must be
allocated on the CP-owned volume specified in the NAMENCP macro
instruction. The alternate console
telecommunication line on a real
loaded by another operating system VM/370 is loaded.
for VM/370 must 3704/3705, unless (OS/VS1, OS/VS2, not be on a
the 3704/3705 is
or DOS/VS) before Part 4 contains a complete discussion on generating a 3704 or 3705 control program. It describes the support provided with the Emulation Program (EP) and tells you how to generate the 3704/3705 control
program, step by step.
Coding the RDEVICE Macro
The RDEVICR macro is described in Part 2. However, the format of the RDEVICE macro for a 3704/3705 is included here to help you code the
macro correctly. The format of the RDEVICE macro for an IBM 3704/3705 is: Part 1. Planning for System Generation 63

3704/3 7 05 Control Program r ,Name ,Operation Operands
1
1 RDEVICE 1
1 , 1
1 , 1 , , L
ADDRESS={ cuu }
(cuu ,nn) , DEVTYPE= {3704} 3705 , ADAPTER= TYPE 1
( , MODEL=ab] TYPE2 TYPE3 TYPE4 IBM 1
TELE2 BSCA L .J [,CPNAKE=ncpname] [ , BASEADD=ccu] ADDRESS={CUU }
(cuu, nn) DEVTYPE={3704} 3705 ADA PTER= TYPE 1 MODEL=ab TYPE2 TYPE3 TYPE4 IBM1 TELE2 BSCA is the real device address (cuu) of the 3104/3705. Use the (cuu,nn) form to generate multiple (nn) real device
blocks (RDEVBLOKs) when CPTYPE=EP is specified.
is the device type. You should specify 3704 or 3105 instead of 2701, 2702, or 2103 when CPTYPE = EP. identifies either the channel adapter accessed by the
specified real address (TYPE1, TYPE2, TYPE3, or TYPE4) ,
or a line adapter if this is an emulator line group (IBM1, TELE2, or BSCA). Only TYPEl is valid for a
device type of 3704. For DEVTYPE=3705, TYPEl or TYPE4 may be coded. In identifying the line
adapter, IBM1, TELE2, or BSCA can be specified only in
relation to another RDEVICE macro that has ADAPTER=TYPE1, TYPE2, TYPE3, or TYPE4. is the 3704/3105 model letter and number, respectively.
The model number determines the size of the 3704/3105 storage. See Figure 11 for a list of the model numbers
and the corresponding storage sizes. You should enter both a letter and a number. However,
if only a single numeric character is entered, an "NOTE is issued and the number is treated as model data for a 3104 or 3705-1, depending on the value of DEVTYPE. 64 IBM VM/370 Planning and System Generation Guide