/{m} m=[o/i/f/d]
\ 	/o
&	symbolic
'	character
"	string pointer

$	backtrace
$r	registers
$f	float regs

{x}%b	set bpt
%l	list bpts
<x>%d	del bpt
%c	continue
{x}%s	singlestep
%r	run

n;      toggle option 'n';
        0       c symbols (auto '_')
	1	address printing
        2       command prefix character