DATA 620/i SYSTEM REFERENCE MANUAL . - Al Kossow's Bitsavers

ANA AND Memory and A Timing: 2 cycles
17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 0
~-T-! 15 M A
L_..J.. _ .......----_---I~___........___________I
I la-bit I
option
The logical-AND is performed between the contents of the A
register and the contents of the effective memory location.
The result is placed in the A register. If the same bit position
of both the effective memory location and A contain a one,
the result is a one. The truth table is shown below, where
n = bit position:
A(n}
Condition
Effective
Memory
Location (n)
Result
A(n}
0 a
0 1
1 a
1 1
0
0
0
1
Indexing: Yes
Indirect Addressing: Yes
Registers Altered: A
3.2.2 Single-Word Non-Addressing Instructions
The format of the single word non-addressing instruction class
is shown in figure 2-5.
The non-addressing single-word instructions include the control
group, the shift group, and the register change group. The
operation is defined by the M field. The address field (A) is
not used by the control group instructions. For the shift group,
the A fi e Id defi nes the type and number of sh ifts. For the
register change group, the A field defines the type of transfer
and the registers affected.
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