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Special Instructions
INTERNAL FUNCTION DRIVERS
Mnemonic
DIF
DRIVE INTERNAL FUNCTION.
DIF 1
DIF 2
DIF
3
DIF 4
DIF 5-6
DIF 7
DI.l
8
DIF 9
DIF 0
INTERNAL STATUS LINES
NIS
AND INTERNAL STATUS
LINES TO Z.
Operand
I
I
Word Times
1
A signal will be sent to those internal function
drivers which correspond to 1-bits in I.
Function
Reset control bit flip-flops 1 and 2, and parity
bit flip-flop.
Reset the buzzer flip-flop.
Set the buzzer flip-flop.
Initiate the hardware load process.
Not assigned.
This is the SEL instruction.
Set control bit flip-flop 1.
Set control bit flip-flop 2.
Set
th~
parity bit flip-flop.
1
The NIS instructions allow the program to
interrogate the status of the I internal status
lines.
A logical AND is performed with I
(1-10) and the internal status lines.
The result of the AND sets the branch flip-flops
in accordance with the results of the AND.
If
the tested condition is true, the zero flip-
flop will have been sett 0. A 1 is a true con-
dition.
If
the zero flip-flop is to be O, then
Z (1-10) must all have been 0.
@&lr&~~tr~ ~@------------
11-22
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