TOPS-20 PASCAL Language Manual - Bitsavers

USING PASCAL ON TOPS-20
• Statement level CD The] isting specifies a statement
level for each line of source code after the first BEGIN
delimiter. The statement level starts at a and increases by
1 for each nesting level of PASCAL structured statements.
Specifically, the CASE statement, the REPEAT statement, Rnd
the BEGIN/END block increase the statement level. The
statement level of a comment is the same as that of the
statement that follows it.
ERRORS and WARNINGS -- The source-code listing includes information on
any errors or warnings detected by the compiler. The actual message
is printed beneath the error in the source code. In addition, the
following items appear in the listing:
• A circumflex (A) that points to the character position in the
line where the error was detected t)
• A numeric code, following the circumflex, that specifies the
particular error G). On the following lines of the source
listing, the compiler prints the text that corresponds to
each numeric code G)
•
The line number 'where the error was detected CD and the
line number of the previous line containing an error G
You can use these error line numbers to trace the error
diagnostics back through the source listing.
SUMMARY -- At the end of the source listing, the compiler tells you
how many errors or warnings were generated (if any), with the source
line number where the last one occurred CD. The compiler prints the
status of all the compilation optjons CD and how much time was
required for the compilation G)
8.4.6.2 Machine-Code Listing - The machine-code listing (if requested
with the /MACHINE-CODE switch) follows the source-code listing. The
machine-code listing contains:
• Source line number CD - A source line number marks the
first object instruction that the compiler generated for the
first PASCAL statement on that source line.
• Octal representation of instruction _ This is the octal
representation of the object instruction.
• Address fa This is the relocatable address of the
instruction.
• Opcode fa This is the mnemonic operation code for the
instruction.
• Operand G - This contains the mnemonic accumulator field
and address field for the operation.
For more information on machine-code instructions, refer to the
DECsystem-lO /DECS,xSTEM-20. Processor Reference Manua 1.
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