Program Logic Manual - All about the IBM 1130 Computing System

*Table 2. The Contents of DCOM (Continued)LABELDESCRIPTIONLABELDESCRIPTION#FCNT#FHOLOFCNT contains the number of files defined for thecore load being built or the execution to be initated.#FHOL contains the displacement, in disk blocks,from word 0, sector 0, cylinder 0 to the first diskblock of the largest unused (1DUMY) area in theFixed Area on the cartridge to which a STORE operationis to be made.# FLET #FLET contains the sector address of the first sectorthroughof F LET on the cartridge mounted on logical diskO F LET+4drive 0. The logical disk drive number is containedin bits 0-3. #FLET+1 through O F LET+4 containanalogous sector addresses for the cartridges onlogical disk drives 1, 2, 3, and 4, respectively.# FMAT #FMAT is a switch Indicating the format of the conthroughtents, if any, of Working Storage on the cartridge# FMAT+4 mounted on logical disk drive 0. #FMAT+1 through# FMAT+4 are analogous switches for Working Storageon logical disk drives 1, 2, 3 and 4, respectively.The switch settings are as follows:O FPADthroughO FPAD+4Setting Meaning-2 disk core image format (DCI)zero disk system format (DSF)+1 disk data format (DDF)OFPAD contains the sector address of the first sectorof Working Storage on the cartridge mounted onlogical disk drive 0. The logical disk drive numberis contained in bits 0-3. #FPAD+1 through# FPAD+4 contain analogous sector addresses for thecartridges on logical disk drives 1, 2, 3, and 4,respectively.# FPAD through #FPAD+4 are effectively the fileprotectionaddresses for the cartridges in use. Theseaddresses are adjusted in non-temporary mode only.# FRDR #FRDR contains the number of the logical disk driveon which the cartridge specified by the "FROM"cartridge ID (in columns 31-34 of the DUP controlrecord) is mounted. The drive number is containedin bits 12-15. A negative number indicates that noID was specified.# FSZE #FSZE contains the number of disk blocks containedin the largest unused (IDUMY) area in the Fixed Areaon the cartridge to which a STORE operation is to bemade.#GCNT#GCNT contains the number of G2250 subroutines tobe defined for the core load being built or the executionto be initiated.# JBSW #JBSW is a switch indicating the mode of operationestablished by the last JOB monitor control record.The switch settings are as follows:Setting Meaningzero temporary modenon-zero non-temporary mode.# LCNT #LCNT contains the number of LOCALS specified forthe execution to be initiated or the core load beingbuilt.# LOSW #LOSW is aswitch used by CLB to indicate thefol lowing.Setting Meaningzero LOCAL may not call a LOCALone LOCAL may call a LOCALO MDF 1#MDF2#MDF1 contains, in bits 8-15, the number of DUPcontrol records to be processed by DUP when calledby the MODIF program. # MDF1 also contains, inbits 0-7, the number of errors detected by DUP duringthe processing of the DUP control records for theMODIF program.#MDF2 is a switch indicating to DUP that controlmust be returned to the MODIF program. The switchsetting are as follows:Setting Meaningzero Do not return to MODIFnon-zero Return to MODIF# MPSW OMPSW is a switch indicating to the Core Load Builderwhether or not a core map is to be printed for each coreload built during the current execution. The switchsettings are as follows:Setting MeaningZero Do not print a core mapnon-zero Print a core map# NAME NAME and O NAME+1 contain the name, in nameandcode, of the program, core load, or data file currently# NAME+1 being processed by the Supervisor, DUP, Core LoadBuilder, or Core Image Loader. The name is obtainedfrom a control record or from a LET/FLET search.# NAME is aligned on an even word boundary.# NCNT #NCNT contains the number of NOCALs specified forthe execution to be initiated or the core load beingbui It.#PCIDthroughO PCID+4#PCID contains the ID (the contents of word 4, sector0, cylinder 0) of the cartridge mounted on physicaldisk drive 0, if that drive is "ready". #PCID+1through #PCID+4 contain the IDs of the cartridges onphysical disk drives 1, 2, 3, and 4, respectively, ifthe corresponding drives are "ready". The entriesfor "not ready" drives contain zeroes.# PIOD #PIOD is a switch indicating the device defined as theprincipal I/O device for the system. The switchsettings are as follows:Setting Principal I/O Devicepositive 2501 with 1442, any modelzero 1442, Model 6 or 7negative 1134 with 1055# PPTR #PPTR is a switch indicating the device defined as theprincipal print device for the system. The switchsettings are as follows:Setting Principal Print Devicepositive 1403 Printerzero 1132 Printernegative Console Printer# RP67 #RP67 is a switch indicating the type of card I/0device present on the system. The switch settingsare as follows:Setting Card I/0 Devicezero 2501 with 1442, Model 5positive 1442, Model 6 or 7# SCRA #SCRA contains the sector address of the first sectorthrough of the Supervisor Control Record Area (SCRA) on the# SCRA+4 cartridge mounted on logical disk drive 0. The logicaldisk drive number is contained in bits 0-3. #SCRA+1through # SCRA+4 contain analogous sector addressesfor any system cartridges on logical disk drives 1, 2,3, and 4, respectively.Section 2. Communications Areas 7