HP 48G - Page 37

Libraries
A library is a “read-only directory” of objects that you
attach to a specific directory in your user memory,
thereby making those objects “visible” (i.e. theirnames
invocable) as part of that directory. Each library is
identified by a unique number in port memory, in the
format # port* number. The number appearsinamenu
if you press (UBRARY) . However, to make it
easier to identify during use, a library’s name appears
in a menu if you press while in the attach-
ing directory (or any subdirectory of it).
You can attach only one library at a time to any given
directory (exceptHOME, which may have any number
of attachments), but you can attach the same library
tomore than one directory atatime. However, before
any library can become attached, it must first reside
in port memory—either Port 0 internally or in one of
the plug-in card slots. With a plug-in card, inserting it
correctly into the required slot effectively places it in
port memory (but be sure to follow instructions care-
fully for plug-in and power-up).
To place a library into Port 0, put the library object
onto the stack, then key in the desired library identifier
(% port* number) and press (STo—exactly analogous to
naming and storing a backup object. (And purging a
library is also analogous.)
To attach an auto-attaching library, simply turn the
machine off, then back on. All auto-attaching libraries
will then be attached to the HOME directory.
To attach (or detach) a library, move to the desired
directory level, then key in the desired library identifier
and use the ATTACH (or DETACH) command.
Other related commands, such as those for merging
card-based RAM, appear via (q]LIBRARY]. Follow the
card’s operating instructions carefully (and see pp.
41-77 here for more details on any single command):
(110)
PORT:|PYARS] LIES |MERG [FREEL[DETAC
ATTRCIPINIT] ]| |
(WRRIIPORT =
B (o BT . i appiicable)
(112)
(user-determined: ports & menus will vary)
(LBRARY), Ports and Backups 35