HP HP-28S - System Operations

25
System Operations
This chapter describes special key combinations that interrupt normal
HP-28S operation. These system operations include printing the dis-
play,
adjusting display contrast, halting programs, resetting memory,
and performing diagnostic tests.
All system
operations begin by pressing the ION I key. You can cancel
any system operation by pressing I DEL I before you release ION I.
The table below shows the keystrokes for system operations, followed
by a description of each.
System Operations
Name
Print Display
Contrast Control
Attention
System Halt
Memory Reset
Repeating Test
Keyboard Test
Cancel
System Operation
Keystrokes
IONIW
IONI~ or IONIG
IONI
ION 1m
IONI~[E
IONlw
ION)I NEXT I
ION)I DEL I
25: System Operations 215