HP HP-65 - Control Operations

For ease of recognition, the digit keys [0], . . ., [9] are displayed
simply as 00, . . ., 09. You can now read the remaining con-
tents of memory.
Press See Displayed Comment
B Represents .
5 B Represents [§.
5 35] Represents [@].
&3 Represents ]*.
5 24] Represents .
Etc. Etc.
Thus, starting at the top, you can now see that the first five codes
(23, 11, 35, 04, 24) represent the default function defined for
the top row ¥ key. This function, AE ,does
nothing more than compute the reciprocal of x.
The key is discussed in Figure 4-1. Note that is used
also in RUN mode to execute a program, one step at a time.
Also, note that to conserve memory, the most frequently used
prefix-suffix pairs are each merged into single codes. Thus, [8
is encoded and displayed as:
Control Operations
In creating a program, you take into account how it is to be
started and how it is to stop. You may recall that in the function
created in the Introduction, you put a label ( ) ahead of
the actual calculating steps so that the beginning of the program
could be found. You also put a return ([F) at the end so that
the program could stop itself:
3 ENTER+ ENTER® X Xx
* Notice that 35, representing the - prefix, determines that the next code 04
be interpreted as , the blue alternate function on the [4] key.