IBM System/360

Edit and Mark EDMK DF
SS Dl(L, Bl), D2(B2) Same as Edit
Prot
Result
(Adr of 1st significant result digit
Adr
0 field= O
recorded in GPR 1) Data 1 field< O
2 field > O
Exclusive OR x
57 RX
Rl,D2(X2,B2) Exclusive-OR opr 2 and opr 1 and the
Adr 0
Result= O
modulo-two sum placed in opr 1
Speci 1
Result 1' O
Exclusive OR XC
D7
SS Dl(L, Bl), D2 (B2) Exclusive-OR opr 2 and opr 1 and the Prot 0 Result - 0
modulo-two sum placed in opr 1
Adr
1 Result -F O
(Left to ·right byte by byte)
(Max opr length is 256 bytes)
ExcluSive OR
XI 97
SI Dl(Bl),I2 The 1 byte from the instruction stream Prot
0
Result= 0
(8-15) is exclusive-ORed with opr 1 and the Adr 1 Result 1' O
modulo-two sum pla.:;ed in opr 1
Exclusive OR XR 17 RR Rl,R2 Exclusive-OR logical opr 2 and opr 1 and the
None
0 Result= O
modulo-two sum placed in opr 1. 1 Result i: 0
Execute
EX
44 RX
Rl,D2(X2,B2)
Execute the instruction at the branch-to
Execute Set by
adr (modified by ORing opr 1 8-15 Adr subject
with Rl 24-31) Spec instruction
(If Rl = O, execute - no ORing)
Halt 1/0
HIO 9E SI Dl(Bl)
Current I/O operation of specified
Privileged
0
Chan or
sub-channel or channel is terminated. Oper sub-chan
(CSW 32-47 are stored) working
(Privileged instruction)
1
CSW stored
2
NOP
Halve (Long) HDR
24 RR
Rl,R2 Fraction shifted right 1, opr 2 placed in Spec Unchanged
opr 1 (FPRs)
(char and sign unchanged)
Halve (Short)
HER
34 RR
Rl,R2 Fraction shifted right 1, opr 2 placed in
Spec Unchanged
opr 1 (FPRs)
(Low-order half of opr 1 unchanged, char
and sign unchangedl
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