Program Logic Manual - All about the IBM 1130 Computing System

CL1, CL2 -- The addresses of the lower and upperlimits, respectively, of parameters in CATCOto be cleared to zero by REST of DUPCO.CNTNO -- Used by GETBI of the DUP I/O interfacesubroutine (in IOBLK) to record the count ofbinary records being read or punched. Permitschecksum and sequence check operations.DATSW The binary equivalent of the decimalvalue in the count field of the DUP control record.Entered by DACNT of DCTL. A non-zerovalue represents either STOREDATA,DUMPDATA, DEFINE FIXED AREA count, orSTORECI with *FILES, *LOCAL, and *NOCALcontrol records following. Contents are in diskblocks if the input is from disk, records if froman I/0 device. Used by DUMP, STORE, DEFINEand FILEQ as a count; also used to control functionalflow. FILEQ clears DATSW before callingSTORE.DBADR -- Set by LETSR of DCTL to the disk blockaddress of the program represented by the lastLET/FLET entry searched. Used by DUMP andDELETE to indicate the disk block address of thedesired program or data file.DELSW Set by LETSR of DCTL to point to the requiredentry in LET/FLET.minus one word.Actually contains a value somewhere in the bufferLETAR. Used by DMPLT when dumping theentry point(s) or name of a single program. Usedby DELETE to point to an entry in LET/FLETthat is to be deleted. Used by STORE to point toan entry in LET/FLET where the entry point(s)is to be inserted.DFNSW -- Set by DFCTL of DCTL to indicate aDEFINE FIXED AREA operation. Used byFRLAB of DCTL to bypass the decoding of theFROM field.DKSAD -- Set by DUP30 and DUP34 of DUPCO toindicate the sector address (without a logical drivecode) of the current GET or PUT operation.DUMPP -- Two words located on even boundary, setby all DUP phases requiring special monitoringdumps. Used by MDUMP of DUPCO to specifylower and upper limits to be dumped to theprinter.EBCSW -- Set non-zero by DCTL when a STOREDATAor a DUMPDATA control record contains an E incolumn 11. Used by STORE when input data is tobe stored in packed EBCDIC format, i. e. 80 cardcolumns to 40 words, and by DUMP when suchdata is to be converted and dumped to cards orprinter.FRWS -- Set non-zero by SC130 if the FROM fieldis Working Storage. Used by DCTL for functionalflow control and error checking.FXSW -- Set non-zero by SC130 or SC170 of DCTLwhen either the FROM or the TO field, respectively,of the DUP control record specifies theFixed Area or when the control record specifiesDEFINE FIXED AREA. Used by DCTL for errorchecking and functional flow control. Used byDFINE, STORE and DUMP for functional flowcontrol.FORSW -- Set non-zero by DFCTL of DCTL when aDEFINE control record indicates that theFORTRAN Compiler is to be deleted from themaster cartridge. Used by DFINE for functionalflow control.IOSW -- Set non-zero by either SC130 or SC170 ofDCTL when any I/O device is specified in theFROM or TO field of the DUP control record.Used by DCTL for error checking and functionalflow control. Used by DUMP and STORE for functionalflow control.LETSW -- Set positive by LECTL and negative byFLCTL of DCTL. Used by DUMPLET to indicate,respectively, a full LET/FLET dump or a FLETdump only.LSTLF -- Set by LETSR of DCTL to the sector address(with a logical drive code) of the last LET/FLET sector searched. If only one sector wassearched, then the address of that sector isentered in LSTLF. Used by DUMP and DELETEto identify the logical drive required.MODSW -- Set non-zero if STCTL of DCTL detecteda STOREMOD function specified by the DUP controlrecord. Used by STORE for functional flowcontrol.NAMSW -- Set non-zero by LETSR of DCTL when aname is found in LET/FLET that matches the nameSection 9. Disk Utility Program (DUP) 47