HP 3000 Manuals

Symbolic Debugger/iX User's Guide

Register Names 

The actual register names used by the debugger as special variables are:

$r0..$r31           General registers

$f0..$f15           Floating-point (double-word) registers

$pc                 Program counter

$sp

$dp

$arg0..$arg3

$ret0..$ret1

MPE/iX 5.0 Documentation