COMTRAN Reconstruction

J28-6169 · January 1962

04.02.02

PDF page 94 of 221. Download the scanned PDF

The page as scanned

The scan of PDF page 94 of J28-6169
Select the scan to open it at full size.

The text read off it

[04.02.02]

CTM recognizes 8 different control cards. All of these are in the format of the Basic Monitor Control cards (Operation begins in column 1).

  1. $IBSYS
  2. $ID
  3. $ENDREEL
  4. $CMPLE
  5. $LOAD
  6. $SUBUP
  7. $MAIN
  8. $PAUSE

$IBSYS cards cause a return to the Basic Monitor.

$ID cards cause a transfer to an accounting routine.

$ENDREEL cards, when read by CTM, cause a reel switch involving SYSIN1 and SYSIN2.

$ENDREEL cards must always be preceded by an associated end-of-file on SYSIN.

The $ENDREEL may occur in the middle of a job (Example 1) or between jobs (Example 2).

Example 1

SYSIN1                                        SYSIN2

CTM Control Card for JOB1                     ---
---    JOB1                                   ---    Remainder of JOB1
---                                           ---
                                               End-of-file associated with JOB1
End-of-file associated with $ENDREEL          CTM Control Card for JOB2
$ENDREEL                                      ETC.

Example 2

SYSIN1                                        SYSIN2

CTM Control Card for JOB1                     CTM Control Card for JOB2
---                                            Etc.
---
---
End-of-file
$ENDREEL