NEC PD754144 - Manual (Page 284)

CHAPTER 11 INSTRUCTION SET
284 User’s Manual U10676EJ3V0UM
CALLF !faddr
Function: [MkI mode]
(SP–1) ← PC 7-4 , (SP–2) ← PC 3-0
(SP–3) ← MBE, RBE, 0, 0
(SP–4) ← PC
11-8
, SP ← SP–4
PC
11-0
← 0+faddr
faddr = 0000H to 07FFH
[MkII mode]
(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
SP ← SP–6
PC 11-0
← 0+faddr
faddr = 0000H to 07FFH
Saves the contents of the program counter (return address), MBE, and RBE to the data memory (stack) addressed
by the stack pointer (SP), decrements the SP, and then branches to an address specified by 11-bit immediate data
faddr. The address range from which a subroutine can be called is limited to 0000H to 07FFH (0 to 2047).
TCALL !addr
Function:
This is an assembler directive for table definition by the GETI instruction. It is used to replace a 3-byte CALL !addr
instruction with a 1-byte GETI instruction. Describe 12-bit address data as addr. For details, refer to RA75X
Assembler Package Language User’s Manual.
I/II