Problems have arisen recently on the PDP15 due to lack of disc space and too many users fighting for the hours during prime shift. This latter problem could be helped by installing RSX, a multiuser system; however, this requires some system work. The lack of disc space means that it is impossible to complete and build large systems which require a lot of temporary disc space. In view of the demand for machine time and the lack of disc space the following measures are being introduced:
(a) Book time on the PDP15 no more than a day in advance, except by prior arrangement with me.
(b) Unless the job requires it, book only an hour block at a time. The hour should be regarded as a maximum, book less if you require less.
(c) Try to fit in an occasional user who wants 5 minutes to VIEW or examine a magnetic tape.
(d) Try to finish promptly at the end of a session.
(e) STUDENTS are restricted to booking a total of 1 hour in advance between the hours of 9 am - 5 pm. any time not booked on the actual day may then be booted after 9.30 am, by students.
(a) No permanent files may be stored on the disc. The disc should only be regarded as scratch storage for use during a session. Any directory may be deleted by me at any time to create more scratch space. DECtapes should be used for keeping permanent copies of files.
(b) Please do not create new UIC's. Any UIC's not recognised by me will be erased. If you want a ne UIC created and can justify it then see me.
(c) Directory SCR (scratch) may be deleted at any time.
Inputting of large files (or many small ones) and long edits should either be performed on the 1906A and transferred to the PDP15 via the BSI or paper tape (using the PRL handler) or done outside prime shift times (09.00-17.00 hrs). It will be possible to transfer files between the two machines using the BSI between 13.00 and 17.00 hrs each day.
Here is an example of how to transfer a file across the BSI (emphasised is user input):
$ PIP
DOSPIP V3B
>T BSI F CTL ← TT (A)
READFILE, filename
ctrl D
CTRL R ctrl R
>TDK file SRC ← BSI F SRC
>T BSI F CTL ← TT (A)
RELEASE, READ
ctl D
CTRLR ctrl R
To transfer a file from the 1906A to PDP15 the file must be TG to :OPERATORS for READ access; filename must be the full 1906A filename eg :GSIN22.FILE
There may be a pause before first CTRL R is typed because of GEORGE
Probably a pause before second CTRL R
$ PIP
DOSPIP V3B
>T BSI F CTL ← TT (A)
WRITEFILE, filename
ctrl D
CTRL R
>T BSI F SRC ← DK file SRC
>T BSI F CTL ← TT (A)
RELEASE, WRITE
ctrl D
CTRL R ctrl R
To transfer a file from the PDP15 to 1906A the file must be TG to :OPERATORS for WRITE access. (or any other ASCII file on the PDP15)
To transfer to the lineprinter on the 1906A one can issue the command PRINTER, username (instead of WRITEFILE, filename). More than one PDP15 file can be sent before RELEASE,WRITE.