Thank you for being so helpful. I will run the tapes and see what happens. I
trust the SA is usually 200 (except for Tic Tac Toe which I know is 400).
BTW: Does DECUS still sell this stuff?
From: Lawrence LeMay <lemay(a)cs.umn.edu>
To: Discussion re-collecting of classic computers
Date: Thursday, October 21, 1999 6:55 PM
Subject: Re: DECUS Paper Tapes
know what some
of these older tapes did:
5/8-9 [(PDP 5/8) - Tape #9] - Analysis of Variance
5/8-15 - A.T.E.P.O. Program
Auto Test in Elementary Programming and Operation
of a PDP-5 computer
The program will type questions or instructions to be performed by
the operator of a 4K PDP-5/8. The program will check to see if
the operator has answered the questions correctly. If this is the
case, it wil type the next questionor instruction.
5/8-45 - Remote Time Shared III System
A time-shared programming system which allows remote stations
immediate access to the computer and a wide selection of programs.
5/8-54 - Tic Tac Toe Learning Program (figured
this one out)
Needs FORTRAN Object Time System
8/8s -77 - Dual Process Sys.
purpose of this system is to expedite the programming of
multiprocessing problems on the PDP-8 and PDP-8/S. It maximizes
both the input speed and the portionm of real time actualy used
for calculations by allowing the program to run during the
intervals between issuing I/O commands and the raising of the device
flag to signal completion of the command. The technique also allows
queueing of input data or commands so that the user need not wait
while his last line is being processed, and so that each line of input
may be processed as fast as possible regardless of its length. The
system uses the interrupt facilities and has less than 3% overhead
on the PDP-8/S (about 0.1% on the PDP-8).
This method is especially useful for a slower machine where the
problem may easily be calculation limited but would, without
such a system, become I/o bound.
The program may also be easily extended to handle input from an
A/D converter. Here, the input would be buffered by groups of
readings terminated either arbitrarily in groups of N or by
This program can increase the I/O to computation efficiency of
some programs by 100%. It can do this even for single Teletype.
Each user will probably want to tailor the program to his individual
Storage Requirement: 600(base 8) registers for two TTY's plus
buffer space. (Several device configurations
> Some of these I can tell what they did by the name but does anyone have
about any of them? (I haven't had time to go through all the
-Lawrence (just got a 1975 DECUS catalog 2 days ago) LeMay