NEC PD754144 - Manual (Page 290)

CHAPTER 11 INSTRUCTION SET
290 User’s Manual U10676EJ3V0UM
11.4.15 Special instructions
SEL RBn
Function: RBS ← n n = N 1-0 : 0-3
Sets 2-bit immediate data n to the register bank select register (RBS).
SEL MBn
Function: MBS ← n n = N 3-0 : 0, 4, 15
Transfers 4-bit immediate data n to the memory bank select register (MBS).
GETI taddr
Function: taddr = T 5-0 , 0: 20H to 7FH
[MkI mode]
• When table defined by TBR instruction is referenced
PC
11-0
← (taddr)
3-0
+ (taddr+1)
• When table defined by TCALL instruction is referenced
(SP–1) ← PC 7-4 , (SP–2) ← PC 3-0
(SP–3) ← MBE, RBE, 0, 0
(SP–4) ← PC 11-8
PC
11-0
← (taddr)
3-0
+ (taddr+1)
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 Note
PC
11-0
← (taddr)
3-0
+ (taddr+1)
• When table defined by TCALL instruction is referenced Note
(SP–2) ← Ч, Ч, MBE, RBE
(SP–3) ← PC 7-4 , (SP–4) ← PC 3-0
(SP–5) ← 0, 0, 0, 0, (SP–6) ← PC
11-8
PC
11-0
← (taddr)
3-0
+ (taddr+1), SP ← SP–6
• 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.
I/II