DDT debugging newbie guide

Notes where exec DDT differs from timesharing DDT.

Command	Timesharing DDT	Exec DDT
file^K	Start program without symbols loaded	N/A
^Z	Suspend program	N/A
$P	Continue
$^K	Load symbols	N/A
name$J	Create job named name	N/A
$L file	Load file into current job, including symbols	N/A
$^X.	Kill current job	N/A
$G	Run program from start
$0G	Set PC to starting address	N/A
n$B	Set breakpoint at n
$B	Remove breakpoint at current location	Remove all breakpoints
.$B	Set breakpoint at current location
.	Current location
$.	Current value of PC
$Q	Last printed quantity
n/	Open location n symbolically (show instructions and symbols)
/	Open $Q
^J	Open next location
^	Open previous location
n[	Open location n numerically
=	Print $Q numerically
_	Print $Q as a symbol
'	Print $Q as six SIXBIT characters
"	Print $Q as five ASCII characters
#	Print $Q as one ASCII character	N/A
^N	Single step	N/A
$^N	Stop at next instruction (skip over calls)	N/A