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Software Product Description Software Product Description PRODUCT NAME: RSX-11M-PLUS, Version 4.6 SPD 14.70.22 DESCRIPTION automatic memory compaction minimizes memory frag­ mentation within a partition. RSX-11 M-PlUS is a product of Mentec Inc., and is licensed under Compaq Computer Corporation's Stan­ Multi-User Features dard Terms and Conditions. A multi-user program development facility is provided. RSX-11 M-PlUS is a disk-based, multi-user operating Multi-user features include lOGIN/lOGOUT with pass­ system that provides a multi-programming environment words, device and file access protection, a round-robin and real-time capabilities using a priority structured, scheduler (running under the real-time executive), and event-driven scheduler. It is a superset of the RSX-11 M concurrent execution of equal priority tasks via execu­ Operating System designed to maximize performance of tive level swapping provide a time-sharing environment. large memory and general purpose PDP-11 processors. The system keeps passwords in an encrypted form, us­ Time-shared, Real-time ing a one-way encryption algorithm. Additional pass­ word and access control features can be enables by a Time-shared program development and interactive pro­ system manager. cessing, real-time tasks, and batch streams can exe­ cute concurrently. The system's software priority levels The system keeps passwords in an encrypted form, us­ enable the user to compile or assemble, debug, install ing a one-way encryption algorithm. Additional pass­ and execute tasks, and run batch streams without sig­ word and access control features can be enabled by a nificantly affecting real-time response. system manager. Priority Levels In addition, accounting information is logged to a disk file. This information includes, among other things, per The system recognizes 250 software priority levels. The user connect time, CPU time, and pages printed. user-specified task priority determines the task's eligibil­ ity to execute. A task can be fixed in a partition to ensure Command Line Interpreters immediate execution when activated, or it can reside on a disk while it is dormant making memory available to RSX-11 M-PlUS supports the traditional MCR com­ other tasks. Task checkpointing allows tasks to be dis­ mand interface, the easy-to-use Digital Command lan­ placed from memory to enable higher priority, nonresi­ guage (DCl), and user-written command interpreters. dent tasks to execute. Memory User-written Tasks Memory sizes from 512K bytes to 4,088K bytes are Tasks can be written in the supplied MACRO-11 as­ supported. Memory is logically divided into partitions sembly language or in optionally available languages, in which tasks are loaded and executed. The system such as FORTRAN-77, BASIC-PlUS-2, and PDP-11 controls the placement of tasks within a partition and C. User libraries and shareable libraries are supported. February 1999 AE-H862W-TC RSX-11 M-PLUS, Version 4.6 SPD 14.70.22 Tasks can be written so the system automatically loads Batch Processor a single, re-entrant code section of a multi-user task and an impure section for each invocation of the task. A powerful, multi-stream BATCH facility is provided with RSX-11 M-PLUS indirect command file processing ca­ Mapping and Instruction and Data Space pabilities. The batch commands are in DCL or MCR format, making this capability easy to use. Status is re­ On Micro/PDP-11/53, Micro/PDP-11/53 PLUS, turned to the batch processor as each step is completed, Micro/PDP-11/73, Micro/PDP-11/83, Micro/PDP-11/93, allowing for conditionalized branching. The batch pro­ PDP-11/44, PDP-11170, PDP-11/84 and PDP-11/94 cessor collects all print files from a batch stream and systems, supervisor mode mapping can be used to map spools them along with the log file. The queue man­ libraries, thus increasing the effective size of a user task. ager gives the system manager control over the multiple On these systems, hardware mapping facilities are batch streams and print queues. available to user tasks to separate instructions and data into separate 64K byte address spaces, doubling the Features address space available to tasks. Note: Not all of the available languages support the • Overlapped disk seek for RA60/70/71 172/80/81/82, Instruction and Data Space and Supervisor Mode avail­ RA90/92, RK06/07, RM02/03/05/06/80, able on these systems. Check the Software Product and RP04/05/06 disks. Description (SPD) for the specific language in question. • Request queue optimization which reduces average Utilities seek times on disks. An extensive set of utilities is provided to facilitate file • Disk Data Caching which for many applications sig­ and system maintenance, error analysis, and program nificantly reduces actual disk I/O operations, thereby debugging. Two editors are provided, EDT and RSX increasing system performance. EDI. • Dynamic dual pathing support for RK06/07, File Structures and Facilities (RP04/05/06,) and RM02/03/05/06/80 disks. The file system provides file structures for block struc­ • Support for the RQZX1 SCSI adapter on Micro tured devices. It also provides automatic space allo­ /PDP-11/53+, Micro/PDP-11/93, and upgraded 11 cation, multi-user file protection, device independence, /73 and 11/83 systems. and logical device assignment. • Support for a specific set of Digital SCSI devices (RX33, RZ23L, RZ24L, RZ26L, and RZ29B disks, Files are logically grouped into directories which can be and TZ30 tape device) using the RQZX1 SCSI labeled by a name. or by a pair of numbers, conven­ adapter. tionally denoting a user and a group to which the user belongs. • Support for virtual devices Two file access facilities are available: File Con­ • Software addressing of up to 256 terminals. trol Services (FCS) and Record Management Services • Support for Terminal Servers on Ethernet us­ (RMS-11). ing the Local Area Transport (LAT) protocol. RMS-11 DECnet-11M-PLUS software is needed for this fea­ supports three file organizations, Sequential, Relative, ture. and Multi-keyed Index Sequential (ISAM), and provides • Terminal Services Architecture (TSA) - Terminals on sequential and direct access modes. an RSX-11 M-PLUS system with DECnet can func­ FCS supports sequential and direct access to sequen­ tion as remote command terminals on other RSX tially and randomly organized files. or OpenVMS systems in the network that also has TSA capability. Likewise, terminals on those remote The use of the File Control Services increases the task systems can function as command terminals on the size by approximately 2K to 8K bytes, depending on the RSX-11 M-PLUS system. number of open files and services desired. The Record • Support for the Digital Multinational Character Set Management System (RMS) requires at least 8K bytes and for user-written translation routines for other per task. character sets. • Upward compatibility for most nonprivileged tasks with RSX-11M-PLUS, Version 2.0, RSX-11M, Ver­ sion 4.0, and Micro'RSX, Version 1.0. Task rebuilding is usually not required. 2 RSX-11 M-PLUS, Version 4.6 SPD 14.70.22 • As of Version 3.0 of RSX-11 M-PLUS and Micro'RSX, PDP-11/94 processors supporting separated Instruc­ the Executive has been vectored. Users can vec­ tion and Data space (1- and D-space), a pregenerated tor their privileged tasks which, in most cases, al­ system is provided that utilizes these features. A lows the tasks to be run on subsequent versions non-I- and D-space system which does not support of RSX-11 M-PLUS or Micro'RSX without rebuilding Supervisor mode is provided for the Micro/PDP-11 them. /23, the PDP-11/23-PLUS, and the PDP-11/24. An automated procedure deletes one of the pregener­ • Ability to connect to, and transfer files to and from, ated systems, if it is not required, in order to recover another system over a serial asynchronous commu­ some disk space. nications link. The file transfer and data terminal em­ ulation utilities allow easy file interchange between For the pregenerated system support for Shadow the RSX-11M-PLUS system and another PDP-11 Recording and Console Logging is provided only in the running a RSX Operating System, or an OpenVMS 1- and D-space system. system running VAX-11 RSX. Communication be­ tween any of these systems is established through a Refer to the HARDWARE REQUIREMENTSsection un­ terminal line. The file transfer utility uses the protocol der Pregenerated System for RL02 Disksfor a list of de­ DDCMP, which provides error detection and correc­ vices supported by the Pregenerated System. tion to assure data integrity. As MFT transfers files using RMS block I/O, all types of data files can be copied. SOURCE CODE INFORMATION • Shadowed Disk Support - Allows one of two disks Source code for the RSX-11 M-PLUS Executive and of the same type to be designated as a shadowed most privileged code modules is provided in the binary backup of the other disk mounted as a Files-11 vol­ kit options on 1600 BPI Magtape and TK50 cartridge ume. All writes to disk are written automatically to tape. This source code is included in order to generate both shadow members. Reading and writing are per­ the RSX-11 M-PLUS system. formed, optionally, on a load sharing basis. In the event of a read failure on the primary drive, the sys­ A separate source license is required for the tem automatically reads the data from the secondary RSX-11 M-PLUS utilities and non privileged modules. A drive. kit for these sources is available on 1600 BPI Magtape, and TK50 Cartridge Tape. • Powerfail/Restart - Allows the system to continue executing upon power restoration, restarting all in­ This source code is provided on an "AS IS" basis with­ terrupted I/O activities and notifying any active task out warranty of any kind either express or implied.
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