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 8: New paper tape handler (PRL.) for treating line-feeds as terminators

J R Gallop

22 February 1973

Existing paper tape handlers (PRA. and PRB.) on the PDP15 treat carriage return (CR) or altmode as line-terminators and ignore line-feeds (LF). The effect of this is that an ordinary ICL-generated tape is read in as one line!

The handler PRB., which only reads IOPS ASCII, has therefore been modified to give a handler, PRL., which is identical except that PRL. also recognises LF as a line terminator. PRL. is now on the system. Its use is perfectly normal and will just be illustrated by the following two examples.

Use with PIP

Suppose we want to produce a disc file FILNAM 000 from a paper tape with LF's.

A PRL 11 
PIP 
T DK FILNAM 000←PRL (A)

The records resulting on disc will, of course, terminate with CRs.

Use with EDITVT

If we want to include a tape in an already existing disc file MYDISC SRC, we proceed as follows :-

VT ON               [if necessary]
A PRL -10 
EDITVT 
OPEN MYDISC 
F *<some string> [Find the line after which pt document is to be inserted] 
G 500               [This command will fetch 500 lines from the pt] 
CLOSE

Note on ICL tapes

A paper tape produced by the 1906A will have on it a visible representation of the jobname that produced it; this should not be passed through the reader and a piece of blank tape follows it to indicate where readable information begins.

The first few readable records will be listing information from the LISTFILE command and can easily be removed with the EDITor after reading in the tape.

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