HP 48G - System Information

To disable all un-assigned keys (i.e. assign them to
“nothing”), enter 'S' and use DELKEYS. To then re-
enable some keys to their standard functions, enter
alist, ¥ 'SKEY' kcode, "SKEY! kcode,,. . +,anduse
STOKEYS. To re-enable all keys, use '8 DELKEYS,
To re-enable all other keys while assigning some,
put 5 as the first object in your assignment list, then
use STOKEYS as usual.
You can view the entire key assignments list at any
time by using RCLKEYS.
SyYSTEM INFORMATION
Batteries
The HP 48G/GX uses 3 AAA batteries (lower com-
partment). Batteries usually last several months—
and the © low-battery annunciator gives ample ad-
vance warning. The memory will also survive a few
minutes without batteries during their replacement.
System Operations
To do system-level operations on your HP 48G/GX,
you press and hold down the key, then press and
release one or more other keys (then release (ON)):
“Cold” restart (erases all memory).
Cancels keystroke (priortokey release).
“Warm” restart (preserves memory).
Starts interactive self-test.
Starts continuous self-test.
1 1
MEO®
2222ePee
Deep-sleep shutdown (turns offtimer).
(1) Performs display screen dump.
{4 Cancels next repeating alarm.
{—)(ONH{+) Adjusts display contrast.
Ports
The upper end of the HP 48G/GX has the 4-pronged
serial port that connects to a Macintosh or IBM-
compatible computer. Under the plastic end plate are
two infrared “eyes” to allow wireless I/O between your
machine and another calculator or printer. (The ar-
row on the top front helps align the infrared beam.)
And the HP 48GX model offers two rear slots for plug-
in memory, software, or other interface cards.
*If this fails, try inserting a straightened paper clip for about 1 second in
the hole under the left rear rubber foot (which is removable).
Custom / System Information 39