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PROGRAMMING THE 91008
PROGRAM OPERATION
As each step is entered, the X reg1ster displays the
address and the octal code for the 1nstruction; the Z
register d1splays the next address to be used and the
instruction conta1ned in that address. The onginal
contents of
Y
remain in Y.
EXAMPLE:
DISPLAY:
0
.
I
/7
~
z
original contents of
Y
~
Y
0.0
23
~
X
address (
+
)00 contains octal code 23, the code
for the
X-+ ( )
key; add ress (
+
)0 1, the next
address to be used, contains octal 17, the code
for the
d
key.
3.
Run the program:
SWITCH:
RUN
PRESS:
~~~~
(
+
or
-
)
or
Starting
Address
PRESS:
END
if starting address is (
+
)00.
a.
The program will run, beginning with the
instruc-
tion in the starting
address,
when CONT is
press-
ed.
b.
Enter data and press CONT as necessary for
pro-
gram execution.
EXAMPLE:
enter and run the program for
A x 8
(Page
66)
A+B
Enter the program:
SWITCH:
RUN
CONTINUED
73
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