Reading Subroutines - HP 82104A Owner's Handbook Manual

16 Card Reader Operations
In the eventthat there is not enough room in program memory to hold the
entire program you are reading, the HP-41C displays the following:
NO ROOM (to let you know there was not enough room for the
entire program),
PACKING (to let you know it is packing program memory in an
attempt to find enough room),
TRY AGAIN (to let you know that you should try reading the card
again).
If you repeatedly get these messages after trying to read the card, you
will have to make room in program memory for the program by reallo-
cating registers, adding memory modules, or deleting instructions or
programs already in program memory.
Any program card-reading session may be terminated before all of the
tracks of a program have been read. Press or to terminate the
session. Program memory is left with the partially loaded program in
place.
Reading Subroutines
The (read subroutine) function is a programmable function
that causes the program on the card that is read to replace the last
program in program memory—all instructions between your last
END instruction and the permanent .£/V0. instruction. However, if
the last program in memory contains the executing function
(as an instruction in an executing program) or the calculator is
currently positioned to the last program (when is executed
from the display), the program that is read in is added after the last
program in program memory.