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

Table G-1 (c)
Logical Instruction Group
Op Code
Octal
Mnemonic
Instruction
Timing
(Cycles)
11 ~RA
13 ERA
15 ANA
Inc lusive OR, Memory and A
Exc I usive OR, Memory and A
AND Memory and A
2
2
2
Table G-1 (d)
Addressing Modes for Single Word Addressed Instructions
M Field
1 1 10 9
Addressing
Mode
Operation
a x X Direct Combine bits 9, 10 with a field
(0-8) to form effective address
(0000 - 2047).
1 0 a Relative Add a fiel d (bits 0-8) to contents
of P to form effective address
(Mod 2 15 ).
1 0 1 Index Add a field (bits 0-8) to contents
(X Register) of X to form effective address
(Mod 2 15 ).
1 1 a Index Add a field (bits 0-8) to contents
(B Register) of B to form effective address
(Mod 2 15 ).
1 1 1 Indirect a field (bits 0-8) specifies location
of an address word.
G-2