Product Name:  PDP-11 FORTRAN-77/VAX to RSX, Version 5.4	SPD 26.16.08

DESCRIPTION

PDP-11 FORTRAN-77/VAX to RSX is a compatibility mode compiler intended to run 
on VMS under VAX-11 RSX. Source programs can be compiled under VAX-11 RSX and 
the object modules then transported to an RSX system for taskbuilding and 
execution.  The ability to taskbuild the transported object modules requires 
the presence of FORTRAN-77/RSX OTS, Version 5.3 on the target system.

PDP-11 FORTRAN-77/VAX to RSX is an extended implementation of the ANSI subset 
FORTRAN-77 standard (X3.9-1978) that runs on the VMS Operating System. PDP-11 
FORTRAN-77/VAX to RSX contains all the features of the ANSI FORTRAN-77 subset, 
many of the full-set language features, and extensions that are not included in 
the ANSI FORTRAN-77 standard. Switch selectable support is provided for 
programs based on the previous ANSI FORTRAN standard (X3.9-1966).

PDP-11 FORTRAN-77/VAX to RSX meets the Federal Information Processing Standard 
Publication (FIPS PUB-69) requirement for ANSI compliance and for a flagger. 
The flagger optionally produces diagnostic messages for syntax and/or source 
form elements that do not conform to the full-level ANSI FORTRAN X3.9-1978 
standard.

PDP-11 FORTRAN-77/VAX to RSX programs can be optionally executed under the 
control of PDP-11 Symbolic Debugger/VAX to RSX (SPD 26.75.xx). Execution of 
application programs using PDP-11 Symbolic Debugger/VAX to RSX aids in the 
location of programming errors in successfully compiled programs that behave 
abnormally when executed.

PDP-11 FORTRAN-77/VAX to RSX includes all subset ANSI features including:

oo   CHARACTER data type

oo   Block IF construct, including IF...THEN, ELSE IF, ELSE, and END IF 
    statements, for conditional execution of blocks of statements

The PDP-11 FORTRAN-77/VAX to RSX compiler includes the following 
features of full-language FORTRAN as defined by the ANSI Standard: 

oo   Double precision and complex data types

oo   Intrinsic functions, including LEN, ICHAR, and INDEX

oo   Exponentiation forms, including double precision and complex

oo   Format edit descriptors, including S, SP, SS, T, TL, TR, Iw.m, and 
    Gw.dEe

oo   Generalized DO LOOP parameters

oo   WHILE and END DO logic parameters

oo   Generic function selection based on argument data type for 
    FORTRAN-defined functions

oo   Lower and upper bounds specification in array declarators

oo   Substrings of character variables and character array elements

oo   Optional syntax for I/O statements (UNIT= and FMT=)

oo   Support for real and complex constant expressions in PARAMETER 
    statement

oo   IMPLICIT NONE statement

PDP-11 FORTRAN-77/VAX to RSX includes the following extensions to the 
ANSI Standard: 

oo   Language elements for keyed and sequential access to RMS multi-key 
    ISAM files

oo   DEFINE FILE, FIND, DELETE, REWRITE, and UNLOCK statements

oo   TYPE and ACCEPT input/output statements

oo   Comments permitted at the end of each source line

oo   INCLUDE statement

oo   BYTE data type

oo   ENCODE, DECODE statements

oo   Explicit specification of storage allocation units for data types 
    (e.g., INTEGER *4)

oo   Hexadecimal and octal constants

oo   Virtual array support for systems with memory management directives. 
    Virtual arrays are memory-resident and require enough main memory to 
    contain all elements of all arrays.

oo   User mode instruction and data space (I & D space) support on 
    processors where both the hardware and software support this 
    feature

oo   O and Z format edit descriptors

The PDP-11 FORTRAN-77/VAX to RSX compiler performs optimization on 
source code to improve execution-time on a PDP-11 with a floating point 
processor. PDP-11 FORTRAN-77/VAX to RSX compiler optimizations include:

oo   Optimizations of arithmetic and logical IF statements

oo   Common subexpression elimination

oo   Removal of invariant expressions from DO loops

oo   Allocation of processor registers across block IF constructs and DO 
    loops

Object Time System

The PDP-11 FORTRAN-77/VAX to RSX Object Time System (OTS) is a set of 
object modules that are selectively linked with compiler-produced object 
modules by the operating system's task builder, to produce a task 
(program) ready for execution. 

PDP-11 FORTRAN-77/VAX to RSX provides the capability of creating either 
or both of the following Object Time systems: 

oo   The OTS based on File Control Services (FCS) allows sequential and 
    random access to sequentially organized files.

oo   The OTS based on Record Management Services (RMS) uses RMS to 
    provide access to sequential, relative, and indexed organization 
    files.

The RMS OTS is normally larger than the FCS OTS, but provides additional 
capabilities. For a given task, it is not possible to mix FCS OTS 
modules with RMS OTS modules.

Compatibility

PDP-11 FORTRAN-77/VAX to RSX, Version 5.4 is equivalent to PDP-11 
FORTRAN-77/RSX, Version 5.4. FORTRAN-77 programs, which are executed 
under control of PDP-11 Symbolic Debugger/VAX To RSX may not execute 
identically on RSX.

HARDWARE REQUIREMENTS

Any full VAX configuration as specified in the System Support Addendum 
(SSA 26.16.08-x). This product is not recommended for any MicroVAX 
configurations due to performance issues.

SOFTWARE REQUIREMENTS*

VMS Operating System

VAX-11 RSX (for compiler execution on the host hardware)

PDP-11 FORTRAN-77/RSX Object Time System (OTS)*

*   Refer to PDP-11 FORTRAN-77/RSX for OTS description (SPD 14.31.xx).

ORDERING INFORMATION

Software Licenses: QL-138A*-**
Software Media: QA-138A*-**
Software Documentation: QA-138AA-GZ
Software Product Services: QT-138A*-**

*   Denotes variant fields. For additional information on available 
    licenses, services and media, refer to the appropriate price book.

SOFTWARE LICENSING

This software is furnished under the licensing provisions of Digital 
Equipment Corporation's Standard Terms and Conditions. For more 
information about Digital's licensing terms and policies, contact your 
local Digital office.

Migration Option

Current licensed users of PDP-11 FORTRAN IV/VAX to RSX are eligible for 
the Migration Option. This is a Single-Use License offered at a reduced 
price and provides all of the standard license rights.

SOFTWARE PRODUCT SERVICES

A variety of service options are available from Digital.  For more 
information, contact your local Digital office.

SOFTWARE WARRANTY

Warranty for this software product is provided by Digital with the 
purchase of a license for the product as defined in the Software 
Warranty Addendum of this SPD.

March 1990
AE-U155J-TE

(R) The DIGITAL Logo is a registered trademark of Digital Equipment Corporation.

(TM) VAX, VMS, MicroVAX, VAXstation, VAXserver, VAXcluster, PDP-11 and RSX, are 
trademarks of Digital Equipment Corporation.

