Chilton::ACL::SPROGS Technical Paper

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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

SPROGS Technical Paper No 13: New LISTIT Commands

W D Shaw

6 August 1973

In developing programs on PDP15, one often wants to repeatedly obtain listing of a large number of files. Rather than type the names of fifty files each time, LISTIT has been modified to read a list of files from the disc and transfer them to magnetic tape for the 1906A. Also, commands to position the output tape have been included.

The new commands are:-

← DISK b <filename> <extension> <cr> 
← RWND <cr> 
← SKEF <cr>
← EXIT <cr>

Disc file <filename> contains a list of source files to be listed (same format as Technical Paper 10). No special DAT slot assignments are required.

RWND leaves the heads positioned immediately after the 1906A4 header.

SKEF leaves the heads immediately before the EOF.

EXIT leaves the program (useful for batch mode).

DAT slot assignments

LISTIT uses the following DAT slots

3   Files to be listed and commands 
4   Error messages 
6   List of files and source file input 
7   Output-magnetic tape

Example

User types 
  A  <sys> - 4 
  E  LISTIT 
  ←  SKEF 
  ←  DISK SOURCE FOO 
  ←  BAR SRC 
  ←  RND

Adds all the files listed in SOURCE FOO plus the file BAR SRC to an existing list tape and rewinds the tape. Incidentally, this could all be read in from punched tape (must be followed by ten X's - XXXXXXXXXX<cr>) by assigning PRA to slot 3.

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