Special Instructions - NEC PD754144 User Manual

11.4.15 Special instructions

SEL RBn
←
Function: RBS n n = N
Sets 2-bit immediate data n to the register bank select register (RBS).
SEL MBn
←
Function: MBS n n = N
Transfers 4-bit immediate data n to the memory bank select register (MBS).
GETI taddr
I/II
Function: taddr = T , 0: 20H to 7FH
5-0
[MkI mode]
• When table defined by TBR instruction is referenced
←
PC
11-0
• When table defined by TCALL instruction is referenced
←
(SP–1)
←
(SP–3)
←
(SP–4)
←
PC
11-0
←
SP SP–4
• When table defined by instruction other than TBR and TCALL is referenced
Executes instruction with (taddr) (taddr+1) as op code
[MkII mode]
• When table defined by TBR instruction is referenced
←
PC (taddr)
11-0
• When table defined by TCALL instruction is referenced
←
(SP–2)
←
(SP–3)
←
(SP–5)
←
PC
11-0
• When table defined by instruction other than TBR and TCALL is referenced
Executes instruction with (taddr) (taddr+1) as op code
Note The address specified by the TBR and TCALL instructions is limited to 0000H to 0FFFH.
290
CHAPTER 11 INSTRUCTION SET
: 0-3
1-0
: 0, 4, 15
3-0
(taddr) + (taddr+1)
3-0
←
PC , (SP–2) PC
7-4 3-0
MBE, RBE, 0, 0
PC
11-8
(taddr) + (taddr+1)
3-0
+ (taddr+1)
3-0
×, ×, MBE, RBE
←
PC , (SP–4) PC
7-4 3-0
←
0, 0, 0, 0, (SP–6) PC
11-8
←
(taddr) + (taddr+1), SP
3-0
User's Manual U10676EJ3V0UM
Note
Note
SP–6