s a constant
indicating the space into which the offset applies. The data in input1
is interpreted as an unsigned offset and should have the same size as
the space referred to by the ID, i.e. a 4-byte address space requires
a 4-byte offset. The space ID is not manually entered by a user but is
automatically generated by the p-code compiler. The amount of data
loaded by this instruction is determined by the size of the output
variable.  It is easy to confuse the address space of the output and
input1 variabl