Operating instructions

the SAVE P switch to preserve the con-
tents of the P register. Also, record
the contents of the
A register on the
log sheet.
3.
Introduce a SET PST instruction (octal
2506015) into the computer through the
control console using the technique des-
cribed under
' Loading an Instruction
Manually.
'
4. If the program is to be resumed at
the poirit of manual interruption, return
the SAVE
P switch to its normal posi-
tion and reinstate the contents of the
A register (as recorded in step 2)
through the option switches.
B. MANUAL AIM TURN-OFF PROCEDURE
1.
Set the AUTO/MANUAL switch toMAN-
UAL position.
2. If the program is to be resumed at
the point of manual interruption, de-
press the SAVE
P switch to preserve
the contents gf the P register. Also,
record the contents of the A register
on the log sheet, or set the option
switches.
3.
Introduce
a SET PST instruction (octal
2506015) into the computer through the
console switches using the technique
described under
' Loading an Instruc-
tion Manually.'
4.
After the SET PST instruction has been
set and executed, follow that command
with a SET PBK instruction (octal
2506016) through the console switches.
5. Next, set a
branch instruction with the
console switches to return to the pro-
gram.
a. If the program
is to be started
over again, set a BRU 0 1 instruc-
tion (octal 2620000.)
b. If the program
is to be resumedat
the point of manual interruption,
set a BRU Y instruction (where Y
represents the memory location
preserved in the
P register by the
action described in step 2).
6.
If the program
is to be resumed at the
point of manual interruption, return the
SAVE P switch to its normal position
and reinstate the contents of the A
register (as recorded in step 2) through
the option switches.
Resetting the PARITY Alarm
Two methods of resetting a PARITY alarm will be
described. The first method
is to be used when the
operator
is
starting a program and the parity error
is in location zero. The second method is to be used
when the program is beyond location zero.
A. RESETTING A PARITY ALARM IN LOCA-
TION ZERO
When the central processor's power
is
first turned on, a parity alert frequently
occurs. Also, a parity alert
is apt to
occur during the initial loading of a pro-
gram, assembly, or compiler. The fol-
lowing procedure should be used to clear
these alerts:
Depress the RESET ALARM swi-
tch. It
nus st be remembered that
the RESET ALARM switch can
damage a program, so this action
must be taken only
when directed
by programmer instructions or
when the operator
is sure that the
error
is in location zero. If the
PARITY
alarm light goes off, the
correction
is made. If the PAR-
ITY alarm light does not go off,
continue with steps
2 through 9.
2.
Set the STOP ON PARITY ALARM/
NORM switch to NORM.
3.
Set the
AUTO/'MANUAE switch to
MANUAL.
4.
Toggle the RESET A switch.
5. Load the STA instruction (0300000)
into the A register.
6.
Depress the A to I switch.
7.
Toggle the RESET A switch (leaves
all zeros in
A).
8.
Depress the START switch (loads
zeros into
memory location zero
where the parity error supposedly
occurred).
9.
Depress the RESET ALARM swi-
tch.
B. RESETTING
A PARITY ALARM NOT IN
LOCATION ZERO
It must be understood that
any time the
STOP ON PARITY ALARM switch
is set and