Abbreviated Key Sequences - HP -11C Owner's Handbook Manual

78 Section 5: Programming Basics
three elements, depending upon whether the instruction required
one, two, or three keystrokes. Each element in a keycode is
composed of two digits that describe the row/column matrix
position of the key represented by the element (except numeric
keys, which are represented by a single digit element).
Line
Number v
017 42, 21, 11
Key
Row 4 2 1
Key
Col. 2 1 1
Abbreviated Key Sequences
In Run or Program modes, the prefix keystroke you would expect
to include in the keystroke sequences for some instructions is not
needed. (An unnecessary prefix keystroke pressed as part of a
program instruction will not appear in the keycode for that
instruction.) For example, pressing will produce the
same results as pressing (f] [RAN#]. References to other keys
that can be used in abbreviated key sequences are included in the
appropriate sections.
Program Control Functions
Program/Run. Pressing switches the calculator
between Program and Run modes. When the calculator is in
Program mode, the PRGM annunciator appears in the display and
program instructions can be inserted or deleted. In Run mode
either programs stored in program memory or individual keyboard
functions can be executed.
Clear Program Memory. Pressing CLEAR [PRGM]in Program
mode clears all programs from Continuous Memory and auto-
matically reallocates Continuous Memory to 21 data storage
registers and 63 lines of available program memory. Pressing
CLEAR in Run mode resets the calculator to line 000 but does
not clear program memory.