Chilton::ACL::FR80 Operations

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Early history □ Minutes of committee meetings □ Progress reports □ Other reports □ News cuttings □ In-house publications □ Committee papers □ Personal recollections □ ACL publications □ Books □ Early Atlas publications □ FR80 reports □ Atlas manuals □ ICL1906A manuals □ Other manuals and papers

General □ Applications Software Group □ Basic Software Group □ FR80 □ FR80 operations □ FR80 project notes □ FR80 technical notes □ FR80 user notes □ Graphics □ Graphics Section □ Graphics Notes □ Graphics User Notes □ PDP15 □ PDP15 Notes □ SPROGS □ SPROGS Technical Notes □ SPROGS Papers □ SPROGS Notes

Further reading □ Overview □ 1 Logging System □ 2 Console Teletype □ 3 June-July 1975 □ 4 Settings □ 5 Maintenance □ 6 Errors □ 7 Simulator □ 8 Copy Tape □ 9 Defaults □ 10 Dumping □ 11 Logging □ 12 Aug-Oct 1975 □ 13 360 Graphics □ 14 Print, Oxford □ 15 Print, RL □ 16 Minutes Nov 1976

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⟶ ACL ⟶ Literature ⟶ Progress Reports ⟶ FR80 Operations

⟶ ACL ⟶ Literature ⟶ Progress Reports ⟶ FR80 Operations

ACL ACD C&A INF CCD CISD Archives

Applications Associates Literature Society Technology Software revisited

Early history □ Minutes of committee meetings □ Progress reports □ Other reports □ News cuttings □ In-house publications □ Committee papers □ Personal recollections □ ACL publications □ Books □ Early Atlas publications □ FR80 reports □ Atlas manuals □ ICL1906A manuals □ Other manuals and papers

General □ Applications Software Group □ Basic Software Group □ FR80 □ FR80 operations □ FR80 project notes □ FR80 technical notes □ FR80 user notes □ Graphics □ Graphics Section □ Graphics Notes □ Graphics User Notes □ PDP15 □ PDP15 Notes □ SPROGS □ SPROGS Technical Notes □ SPROGS Papers □ SPROGS Notes

360 Jobs that Generate Graphics in more than one job step

R Brandwood

12 January 1976

DESCRIPTION

Graphics output on the 360 is sent mostly to the HASP spool area. HASP allocates one continuous area per "camera" per job, regardless of the number of job steps. Jobs may fail for a number of reasons, some recoverable, some not. In many cases the system may close down the job (including its graphics spool area) before the program being run can take remedial action. For single-step graphics jobs, it costs little to make the despooler check for a minimum number of filemarks and supply a log-out record if necessary. However, for the multi-step job the additional checks would require considerably greater overheads (ie every record would have to be checked for ***SYSLOG and running totals of GSTART and GEND records kept).

In the case of multistep jobs (which the Despooler will flag with the message:

$$$$ MULTI-STEP JOB $$$$ NO OF FR80 JOBS= n $$$$

the operator should be on his guard for FR80 jobs that fail to log out properly (they should all log-in OK).

Single-step jobs should not be affected in any way. Multistep job output for print programs should not be affected as the despooler supplies the "comma records" and suppresses any accidental "comma records" that may arise in the user's output.

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