Control Data 3170 Installation Handbook page 23

1.6.4
ANSI COBOL
Compute statement in vol ving exponentiation of BCD numeric fields that are greater thar
11 digits loses accuracy since exponentiation is performed in floating-point mode.
ANSI COBOL is limited to one of the following minimum hardware configurations.
1. A 3170, 3300, or 3500 computer system with 32K of memory and a
BDP module (3304-2, 3304-3, 3504-1, 3514-2, or a 3514-4).
2. A 3100, 3170, or 3200 computer system with 32K of memory and a 3312/
10256 BDP module and interface.
1.6.5 MSOS UTILITY
Performing an I/O function from a unit onto itself does not result in a diagnostic.
MSOS utility functions which use tape parity (even or odd) to determine the mode in
which data is recorded (BCD or binary) do not perform correctly with 9-track tape
transports (MMTC/659). In particular, COpy and VERIFY are unable to process
mixed-mode 9-track input tapes correctly. COpy and VERIFY process a pack mode
input tape correctly. COpy writes output tapes correctly, regardless of the modes to
be used.
1.6.6 ANSI FORTRAN
ANSI FORTRAN is limited to the following minimum configuration.
I
Minimum requirements for MSOS 5. 1.
32K memory
Compiler routines compiled with ANSI FORTRAN must be compiled with the S option.
t
Object-time routines compiled with ANSI FORTRAN must be compiled without the S
option.
t
1.6.7 ALGOL
A
~
punch in column 1 is interpreted by CDC card readers as an end-of-file card.
Therefore, a ~ punch (left brace in Hollerith, quotation mark in ASCII) in column 1
of card input causes an end-of-file indication. Therefore, ALGOL source cards using
ASCII card punch codes should not begin control statements (such as BEGIN and END)
in column 1.
t
The presence of the S parameter on the UFOR TRAN card specifies integers and
logical variables compiled as 24-bit entities; the absence of the S parameter specifies
48-bit entities.
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