RCA 70/46 User Manual

Compare logical
(ClR) (Cl) (CLI) (ClC)
General Description
Format
(RR)
(RX)
(51)
(55)
Condition Code
Interrupt
Action
Notes
Logical
Instructions
• The operand specified by the first address is logically compared with the
operand specified by the second address (RR format: Rl to R
2
; RX format:
Rl to X
2
/BdD
2
;
SI format: Bt/Dl to 1
2
; SS format: Bt/Dl to BdD
2
).
The result of the comparison determines the condition code. These instruc-
tions process all bits as part of an unsigned binary quantity. All codes are
valid and the instruction is terminated on inequality or when the operand
bytes have been exhausted.
I
(CLR) 15 I
Rl I
R2 I
0 7
8 11 12 15
(CL) 55
I
Rl I
X
2
I
B2 D2
0
7 8
11 12 15
16 19
20
31
I (CLI) 95 I
12
I
Bl
I
Dl
o 7 8
15 16 19
20
31
I (CLC) D5 I
L
I Bl
I
Dl
B2
o 7 8
15 16 19
20
31 32 35 36
• 0 - the operands are equal.
1 -
the first operand is less than the second operand.
2 - the first operand is greater than the second operand.
3
-not used.
• Address error:
Addressing (RX, SI, SS only).
Specification (RX only).
• 1. Both operands are unaltered.
D2
47
2. In the SI format, the immediate byte in the 12 field of the instruction
being executed is the second operand.
3. Processing is
from left to right and can extend to field lengths of
256 bytes.
4. The operation can be used for alphanumeric comparisons.
174

RCA 70/46 Specifications

General

Brand	RCA
Model	70/46
Category	Computer Hardware
Language	English