Getting Ready for RSX-11 M/M-PLUS NETGEN
3.1 RSX-11 M-PLUS System Requirements
Getting Ready for RSX-11 M/M-PLUS NETGEN
This chapter discusses the requirements that must be met before a RSX-IIM/M-PLUS NETGEN can be performed. These requirements vary, depending on the target system.
Jfyour target system is RSX-IIM-PLUS, read Section 3.1 and skip Section 3.2. Jfyour target system is RSX-IIM or RSX-llS, skip Section 3.1 and read Section 3.2. Section 3.3 is common to all RSX systems and describes the PREGEN procedure that may have to be performed prior to NETGEN.
3.1 RSX-11 M-PLUS System Requirements
This section describes the pre-NETGEN requirements for RSX-IIM-PLUS systems.
RSX-IIM-PLUS systems require very little advance preparation for network genera-tion. Section 3.1.1 describes the considerations for preSYSGENned RSX-IIM-PLUS systems. The considerations for SYSGENned RSX-IIM-PLUS systems are discussed in Section 3. 1. 2.
3.1.1 PreSYSGENned RSX-11 M-PLUS Systems
Pre-NETGEN considerations on preSYSGENned RSX-IIM-PLUS systems are listed below and described in the sections that follow.
• Hardware CSR selection
• System selection
• Customizing the start-up command procedure
• Possible device reconfiguration
• Possible PREG~N
3.1.1.1 Hardware CSR Selection - You must have the "floating" device control and status registers (CSRs) at the proper addresses on the target processor. Tile proper addresses for floating devices are determined according to the standard UNIBUS/QBUS device rankings. A command file, [200,200]FLOAT.CMD, is provided on the distribu-tion kit to aid you in determining the device CSR)address.
3.1.1.2 System Selection - There are two system images on the RSX-11M-PLUS preSYSGENned distribution kit. One system (the Kernel I-space system) runs on a PDP-11123-PLtJS or a PDP-11124 processor. The other system (the Kernel D-space system) runs on the PDP-11144, PDP-11/70, PDP-11173, PDP-11183, and PDP-11184 proces-sors. Before doing a NETGEN, you should use the procedure provided with the RSX-11M-PLUS distribution kit to delete the system that you will not be using. If you do not use the supplied procedure, some unwanted libraries may be left on the target system disk and NETGEN may give you the option of using them (for example, supervisor mode FCS or supervisor mode RMS libraries).
3.1.1.3 Customizing the Start-up Procedure - The RSX-11M-PLUS pre-SYSGEN ned systems come with a start-up procedure that will deallocate the Communi-cations Executive (CEX) space needed by DECnet-RSX. In order to prevent this, the file [l,2]SYSPARAM.DAT must be modified. You must modify the line 'DECNET = NO' to read 'DECNET = YES'. The system must be rebooted after this change in order for the change to take effect.
If you have properly modified the file, you will see the following lines during system start-up:
Step 2 - Deal locating DECnet communications executive System configuration includes DECnet
The presence of the second line indicates that the CEX space has not been deallocated.
3.1.1.4 Device Reconfiguration - The start-up file will automatically configure the devices on the system so that they can be used by the Executive and not by the net-work. To release a device for DECnet use, observe the following procedures:
• Check the CON_ONLINE~LL = parameter in your [l,2]SYSPARAM.DAT file to be sure that it is set to YES.
• Enter CON OFFLINE commands for those devices that you want DECnet to use.
You can enter commands individually or you can build a command file that will execute these commands automatically after the startup procedure completes. If you want to take the command file approach, you must specify the name of the command file in the STARTFILE
=
parameter of [l,2]SYSPARAM.DAT. See the RSX-IIM-PLUS System Management Guide for instructions on how to use the CON OFFLINE command.3.1.1.5 PREGEN - Depending on the type of kit you received, you may have to per-form a PREGEN. Proceed to Section 3.3 to see if your kit type requires a PREGEN.
3.1.2 SVSGENned RSX-11 M-PLUS Systems
The RSX-IIM-PLUS SYSGEN procedure displays three questions that must be answered (as described in the following sections) to properly configure the RSX-IIM-PLUS operating system for DECnet support. These questions specify the inclusion of:
• Support for DECnet
• DECnet communication devices
• Queued file access
After reading the following subsections, proceed to Section 3.3 to determine if your type of kit requires a PREGEN.
3.1.2.1 Including Support for DECnet, PSI, LAT - To create the proper support for DECnet, PSI or LAT on the system you are generating, answer YES to the following question in the Executive Options section of SYSGEN:
>* CE120 Do you want support for communications products
(such as DECnet, PSI and LAT)?[Y/N D:N]:
3.1.2.2 Including support for LAT Terminal Servers - If you want to support LA T terminal servers, answer YES to the following question in the Executive Options sec-tion of SYSGEN:
>* CE122 Do you want host support for LAT terminal servers? [YIN D:N] :
If you answer NO to this question you will generate a system that cannot be used with DECnet.
3.1.2.3 RSX and DECnet Communications Devices - Because the RSX-IIM-PLUS Executive does not need to know anything about hardware that will be used as DECnet communications devices, and because no communications device can be shared between DECnet and the Executive, do not specify any DECnet communica-tions devices when answering quescommunica-tions in the Target Configuration section of SYSGEN.
However, when you generate your RSX system, you must specify how much space is to be allocated for interrupt vectors on your target system, and the space must be suffi-cient to include the interrupt vectors belonging to DECnet devices.
To specify properly, answer the following question with the highest vector address of devices on your system, including the DECnet communications hardware.
>* CP9632 What is the highest interrupt vector address?
These vector addresses are available as a result of hardware installation.
For this question, do not specify the default, since the value that SYSGEN computes in this case would not take into account DECnet communication devices. In answering this question for your operating system, be sure to leave enough space for devices you have or will soon have.
If your DECnet system includes any of the following character interrupt devices -DUP, DU, DUV, DL, DLV, or DPV - you must add 20 octal bytes to the highest inter-rupt vector address.
The highest interrupt vector address you can specify is 774. This value, which includes the 20 additional octal bytes required for DUP, DU, DUV, DL, DLV and DPV, allows enough space for any devices you may choose.
3.1.2.4 Queued File Access Requests - FTS allows file access requests (file trans-fers, etc.) to be queued and processed in sequence. If you want FTS, the RSX-IIM-PLUS queue manager (QMG) must be built during SYSGEN by answering YES to the fol-lowing question:
>* CE180 Do you want to include the queue manager? [YIN D:N]:
For more information on FTS, see the DECnet-RSX Guide to User Utilities.