A variety of additional programs are provided with PDP-3.
One of the more important programs is the Typewriter Interrogator
Program (TIP). TIP allows the typewriter to be used most effectively as
an input-output link by which programs and data are examined and
modified. The features include request for printing of a series of
registers, interrogation and modification of the contents of registers,
and the ability to request new tapes after programs have been suitably
modified. Communication is done completely via the typewriter in either
octal numbers, decimal numbers, or alphanumeric codes. Register contents
are presented in similar form.
Other miscellaneous routines handle arithmetic processes, e.g., number
conversions, and communication with the input or output devices. These
routines include various format print outs, paper tape and magnetic tape
read in programs, and display subroutines.
* * * * *
[Illustration: SYSTEM BLOCK DIAGRAM FIGURE 1]
[Illustration: INSTRUCTION FORMAT FIGURE 2]
[Illustration: FIGURE 3]
* * * * *
Transcriber's Notes: