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51
μ
PD750104, 750106, 750108, 750104(A), 750106(A), 750108(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
PD750104
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
PD750106, 750108
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
PD750104
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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