1130 Commercial Subroutine Package - All about the IBM 1130 ...

INTRODUCTIONThe 1130 Commercial Subroutine Package has been written to facilitate the use ofFORTRAN in basic commercial programming. Included in the package are the followingitems:• The GET routine, which allows the programmer to decode input records after theyhave been read. This eliminates the common FORTRAN-associated problem thatoccurs when input cards enter the system in an unknown sequence. Input recordsthat vary in this way may be read with the Al format and converted to real numbers(using GET) after the program has determined which type record was just read.• An editing routine, EDIT, for the preparation of output in special formats. WithEDIT it is possible to insert commas, supply leading blanks, float dollar signs,display a CR symbol after negative numbers, etc. EDIT is especially useful in thepreparation of invoices, checks, and other commercial documents.• Code conversion routines for data manipulation and more efficient data packing:GET - Al format to RealPUT - Real to Al formatPACK - Al to A2 formatUNPAC - A2 to Al formatA1A3 - Al to A3 formatA3A1 - A3 to Al formatDPACK - Dl to D4 formatDUNPK - D4 to D1 formatA1DEC - Al to decimal formatDECA1 - Decimal to Al format• A variable-length decimal arithmetic package. In this system, all arithmetic is donewith integer or decimal numbers, with field lengths chosen by the user. This subsetof the Commercial Subroutine Package includes routines for variable-length decimaladd (ADD), subtract (SUB), multiply (MPY), divide (DIV), compare (ICOMP), andsign test (NSIGN).Use of this system eliminates two of the arithmetic problems associated withFORTRAN: the accuracy problem (the inexact representation of fractions) and themagnitude problem (extended precision values limited to nine digits, etc.).• Subroutines for improved speed and control of I/O devices. By taking advantage ofthe 1130's cycle-stealing capability, the overlapped I/O routines can substantiallyspeed the throughput rates of many jobs. Subroutines are supplied for theIBM 1442 Card Read PunchIBM 1442-5 Card PunchIBM 2501 Card ReaderIBM 1132 PrinterIBM 1403 PrinterConsole KeyboardConsole Typewriter-1-1.1.1.1111111111$11111E HHIcilil 1111111111n 11111 1111111111111111111111111 1111111111111111111111111