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The DEPOSIT/DEPOSIT NEXT switch is similar in its
operation but provides for changing the data or program
stored in the memory.
the DEPOSIT position, the values of the lower address
byte switches, that is, bits 0 through 7 labeled Address-
Data, are deposited into the address currently being
indicated on the 16 address bus indicators.
DEPOSIT switch is actuated, the data will appear on the
data bus indicators.
the switches were set wrong, the switches can be changed,
the DEPOSIT switch actuated again, and the new values
will be deposited to memory in that same location.
When the DEPOSIT NEXT position is actuated, the address
currently appearing in the 16 address bus indicators is
first incremented by 1 and the data entered into the
ADDRESS/DATA switches is deposited in that following
location and will appear in the data bus.
NEXT position functions exactly the same as depressing .
EXAMINE NEXT to increment the address bus by 1 and then
actuating DEPOSIT to deposit the ADDRESS-DATA switch
positions into that location.
When the processor is stopped, instructions may be ex
ecuted one at a time through the use of the SINGLE STEP
switch to the right of the RUN/STOP switch.
switch is depressed or raised, the processor board is
permitted to run one instruction, and it will stop when
it is in the fetch cycle in the following instruction.
Thus repeated operations of this switch permit the pro
grammer to step through his program one instruction at
a time and follow what the machine is doing, noticing
on the data bus what the fetched instruction i s , and
on the address bus the location from which that in
struction is being fetched.
multiple memory accesses, for instance those with an
address following in the second or third byte, each
operation of the SINGLE STEP switch advances through
only one part of the instruction.
the instruction being read in and each byte of data
being read in or out may be observed on the panel.
4 - 2 6
When the switch is actuated to
If the data was incorrect because
For instructions requiring
Thus, each byte of
CP-A
User Guide
Revision 1
After the
The DEPOSIT
If this
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