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This help file (HLP:SIMULA.HLP) contains general information on the
SIMULA system. The current version is 4A(310), July 1978.
Information about changes and additions in SIMULA releases 2, 3, 3A and
4 can be found in DOC:SIMULA.DOC. More specific information about the
SIMULA system can be obtained by issuing the monitor commands
HELP SIMCOM (compiler information),
HELP SIMDDT (debugging system),
HELP SIMRTS (object time system),
HELP SIMDIR (utility program for separate compilation).
SIMULA Language Handbooks I, II and III are available. They can be
ordered from FOA He1 Report Center, S-10450 Stockholm, SWEDEN.
SIMULA is a general purpose language which contains Algol 60 as a
subset. In addition to the facilities offered by Algol, SIMULA is
especially suited for list-processing, text handling and simulation,
through the class concept, reference and text variables and the system
classes SIMSET and SIMULATION. Input/output is efficient and closely
linked to the text handling facilities. The class concept is unique to
SIMULA. Through a class declaration, one can define a data structure
and operations on the data as one entity. With suitable class
declarations, SIMULA can be turned into a special purpose language for
almost any application field. SIMULA also contains a powerful facility
for separate compilation of classes and procedures. For applications
where useful subroutines are available in FORTRAN or in assembly code
(MACRO-10), it is easy to call external procedures in those languages.
DEC-10 SIMULA is closely compatible with IBM 360/370 and UNIVAC
1100-series SIMULA. SIMULA programs written for these systems can be
run almost unchanged. For SIMULA programs written for other systems,
conversion programs are available (CDCSIM for CDC and UNIVAC SIMULA,
IBMSIM for IBM SIMULA).
SIMULA programs should have file name extension SIM, which is recognized
by the COMPIL cusp and by LINK-10. A SIMULA program is compiled, linked
and run in the same way as any standard language processor, e g FORTRAN,
by using the commands COMPILE, DEBUG, LOAD or EXECUTE. The SIMULA
system has a powerful debugging system, SIMDDT, which is loaded via the
DEBUG command at program start, on errors or via a ^C-REENTER sequence
at any point during a program run. No special statements have to be
introduced into the SIMULA text to use SIMDDT.
Errors should be reported in writing to the SIMULA maintenance group,
FOA He1, 104 50 Stockholm 80, tel 631500 (08-631800), using the error
report form shown in the SIMULA Language Handbook, Part II, App I.
The failing program and its data should be kept available without change
and its protection code should make it possible to read from any ppn,
unless it is secret. If the error can be isolated in a smaller and
simpler program, the smaller program should be submitted.
[END OF SIMULA.HLP]