13cb294274
New Hardware support: - IBM 653 Storage Unit: provides machine opcodes for Floating Point, Immediate Access Storage (IAS), Three Index registers, Cards Punch-read synchronizers 2 and 3. New Software included: - FORTRANSIT: version II (S), plus run time PACKAGE with standard Fortran functions. - Reorganized sw directory, separating each language in its own folder. Each one Includes a 00_readme.txt file with restoration notes and comments. New features: - Support for SOAP opcode mnemonics in addition to regular IBM mnemonics - FAST / REALTIME CPU options - PROP pseudo register - CARDDECK ECHOLAST command
58 lines
1.9 KiB
Text
58 lines
1.9 KiB
Text
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Restoration comments May/2018
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Internal Translator (IT Compiler)
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From Bitsavers Manual CarnegieInternalTranslator.pdf
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The run_it.ini script uses P1 run-time package that
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provides floating point +,-,/,* PUNCH and READ, that's
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all. In particular, it does not provides power functions
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so using power operator in IT program will crash the
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object program in run-time.
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To allow the use of IT power operator, replace _P1
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package by _P2, _P3 or _P4 (depending on what is needed)
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In the original listing found in manual, some opcodes has
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a different name of the standard SOAP II ones.
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They have been changed to regular SOAP names
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Mnemonic in Standard SOAP
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original listing equivalent mnemonic
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AAB -> AML
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SAB -> SML
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NZA -> NZE
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RAB -> RAM
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RSB -> RSM
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RDS -> RD1
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IT compiler generates also these opcodes in object
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program, to be assembled by IT modified y SOAP I. As
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SOAP I is not available, the IT compiler has been
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modified to produce standard SOAP II opcodes.
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These modifications are done in lines 394-410, file
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it_compiler_listing.txt with a comment to signal it.
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Also all the correction to the listing stated in the
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manual has been applied. They are stated at the
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end of it_compiler_listing.txt file.
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Original listing in manual describes the modifications
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to apply to standard SOAP I deck in order to assemble
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IT compiler produced SOAP code (soap_patch_listing.txt).
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As SOAP I is not available, an equivalent set of modifications
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has been written to be applies to SOAP II in order to
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allow to assemble IT produced compiled code (soapII_patch.txt)
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Floating point numbers are encoded as
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2300000049 = 0.23
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1000000050 = 1.0
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1500000052 = 150.0
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