Difference between revisions of "DDT"

From Computer History Wiki
Jump to: navigation, search
(Implementations found on ITS: HALI too.)
(Original MOS one was in -11 asembler)
Line 5: Line 5:
 
* Arguments are commonly prefixed to the command.
 
* Arguments are commonly prefixed to the command.
  
DDT was first implemented at MIT for a [[PDP-1]] computer.  It was then implemented for [[PDP-6]], [[PDP-10|10]], and [[PDP-11|11]] computers at MIT. It was also widely used at [[Digital Equipment Corporation|DEC]].
+
DDT was first implemented at MIT for a [[PDP-1]] computer.  It was then implemented for [[PDP-6]], [[PDP-10|-10]], and [[PDP-11|-11]] computers at MIT. It was also widely used at [[Digital Equipment Corporation|DEC]].
  
A version was written in [[portable]] [[C programming language|C]], and used with the [[MOS operating system]] on [[PDP-11]]'s, various [[Motorola M68000 Family]] machines, and [[AMD 29000]] machines.  
+
A version was written in [[portable]] [[C programming language|C]], and used with the [[MOS operating system]] on [[PDP-11]]'s, various [[Motorola M68000 Family]] machines, and [[AMD 29000]] machines, to replace the original MOS one, written in PDP-11 [[assembly language]].  
  
 
== Implementations ==
 
== Implementations ==

Revision as of 12:58, 7 October 2019

DDT (Dynamic Debugging Technique) is a family of debuggers with some common characteristics:

  • Most commands are invoked with a single key, plus modifiers.
  • Altmode or Escape is used as a prefix modifier.
  • Arguments are commonly prefixed to the command.

DDT was first implemented at MIT for a PDP-1 computer. It was then implemented for PDP-6, -10, and -11 computers at MIT. It was also widely used at DEC.

A version was written in portable C, and used with the MOS operating system on PDP-11's, various Motorola M68000 Family machines, and AMD 29000 machines, to replace the original MOS one, written in PDP-11 assembly language.

Implementations

Implementations found on ITS

  • Exec DDT, also known as NTS DDT, for the PDP-6 and 10.
  • Timesharing DDT for the PDP-6 and 10.
  • KLDDT specifically for the KL10.
  • RUG for the PDP-11.
  • URUG, or micro RUG, for the GT40.
  • KLRUG for the KL10 front end.
  • 11DDT for the PDP-11.
  • CARPET remote PDP-11 debugger hosted on a PDP-10.
  • HALI target resident counterpart to CARPET.
  • MAT resident debugger for PDP-11.
  • Timesharing DDT for SITS.
  • IMDDT for Imlac PDS-1.