
51
μ
PD750004, 750006, 750008, 750004(A), 750006(A), 750008(A)
Group
Special
Mne-
monic
SEL
GETI
Notes 1, 2
Operand
RBn
MBn
taddr
Bytes
2
2
1
Machin-
ing
cycle
2
2
3
3
4
3
Skip
condition
Depends
on the
referenced
instruction.
Depends
on the
referenced
instruction.
Depends
on the
referenced
instruction.
Address-
ing area
*10
*10
Operation
RBS
 ←
 n (n = 0 - 3)
MBS
 ←
 n (n = 0, 1, 15)
 
μ
PD750004
When the TBR instruction is used
.........................................................
When the TCALL instruction is used
(SP - 4) (SP - 1) (SP - 2) 
←
 PC
11-0
(SP - 3) 
←
 MBE, RBE, 0, 0
PC
11-0
←
 (taddr)
3-0
 + (taddr + 1)
.........................................................
When an instruction other than the
TBR and TCALL instructions is used
Execution of (taddr)(taddr + 1)
instruction
 
μ
PD750006, 750008
When the TBR instruction is used
.........................................................
When the TCALL instruction is used
(SP - 4) (SP - 1) (SP - 2) 
←
 PC
11-0
(SP - 3) 
←
 MBE, RBE, 0, PC12
PC
12-0
←
 (taddr)
4-0
 + (taddr + 1)
.........................................................
When an instruction other than the
TBR and TCALL instructions is used
Execution of (taddr)(taddr + 1)
instruction
 
μ
PD750004
When the TBR instruction is used
........................................................................
When the TCALL instruction is used
(SP - 6) (SP - 3) (SP - 4) 
←
 PC
11-0
(SP - 5) 
←
 0, 0, 0, 0
(SP - 2) 
←
×
, 
×
, MBE, RBE
PC
11-0
←
 (taddr)
3-0
 + (taddr + 1)
When an instruction other than the TBR
and TCALL instructions is used
Execution of (taddr)(taddr + 1)
instruction
Notes 1.
 The shaded portion is supported in Mk 
ΙΙ
 mode only.  The other portions are supported in Mk 
Ι
 mode only.
2.
 TBR and TCALL instructions are assembler pseudo instructions to define tables used for GETI instructions.
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