Control Data Cyber 170 State Hardware Reference Manual page 153

PP Replace
lnstructrons
Replace add 1 ( ( d l
)
This instruction replaces the operand, which is obtained from the location
specified by the content at location d, by its original value plus 1 . The
result remains in the
A
register at the end of the operation, and the original
content of
A
is destroyed.
Replace add (m
+
(dl) RAM m,d
This instruction adds the operand, which is obtained from the location
determined by indexed direct addressing, to the
A
register.
The lower 12 bits
of the sum replace the original operand in PPM.
The result remains in A at the
end of the operation, and the original content of A is destroyed.
In indexed direct addressing, the quantity m, which is read from PPM location P
plus 1, serves as the base operand address to which the content of d is added.
If d equals 0, the operand address is m, but if d is not equal to 0, m plus the
content in d is the operand address. Therefore, location d may be used as an
index quantity to modify operand addresses.
56dm Replace add 1 (m
+
(dl) AOM m,d
This instruction replaces the operand, which is obtained from the location
determined by indexed direct addressing, by its original value plus 1. The
result remains in the A register at the end
o f the operation, and the original
content of
A
is destroyed.
In indexed direct addressing, the quantity m, which is read from PPM location P
plus 1, serves as the base operand address to which the content of d is added.
If
d equals 0, the operand address is m y but if d is not equal to
0, m plus the
content in d is the operand address. Therefore, location d may be used as an
index quantity to modify operand addresses.