Digital Equipment 300 Series AXP Reference Manual page 115

The
[-{address_option}]
Address
Option Description
The address space is virtual memory.
-vm[em]
The address space is physical memory (default)
-pm[em]
Processor status register (PS). The data size is always
ps
a quadword.
Unprotects a protected memory location. Use
-u
caution when depositing information in memory
locations 0 - 200000, as they contain the console code,
hardware restart parameter block, console routine
block, console terminal block, memory descriptors,
page tables, etc. Be aware that the
you unprotected access to these registers.
General purpose register, R0 through R31. The data
-r
size is always quadword.
-fr Floating point register, FR0 through FR31. The data
size is always quadword.
Internal processor registers (IPRs). The data size is
-i
always quadword.
Program counter. The data size is always quadword.
pc
Stack pointer. The data size is always quadword.
sp
1
This option should not be typed with the hyphen (-).
qualifiers specify address type:
1
DEPOSIT
qualifier gives
-u
1
1
4–17