USBB17RX78K4-XXX NEC Electronics, USBB17RX78K4-XXX Datasheet - Page 38

• Manufacturer Part Number: USBB17RX78K4-XXX
• Description: 78K/4 series realtime OS
• Manufacturer: NEC Electronics

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Be sure to directly call the following i
the branching module.
addresses corresponding to unused system calls can be used by users.
The ret_int and ret_wup system calls are branched out to system calls directly by the BR command.
Differences between “
System call “i
dispatched when “ret_int” has been issued that returns execution from the interrupt handler, or “ret_wup” that
returns execution from the interrupt handler and wakes up a task. When a system call is recovered from the
interrupt handler with the RETI command, dispatching occurs in the next system call.
ichg_pri (42H), irot_rdq (44H), iwup_tsk (46H), iset_flg (48H),
isig_sem (4AH), isnd_msg (4CH)
´´´
_
´´´
´´´
” is started by an interrupt handler and is not dispatched its own. This system call is
_
The values in the brackets indicate the addresses of the CALLT table.
´´´
” and “i
CHAPTER 4
get_ver
sta_tsk
ext_tsk
Fig. 4-1 Entry Address Storage Table
00H
´´´
´´´
.
.
.
.
_
_
´´´
´´´
” system calls
system call issued from the interrupt handler, without going through
RX78K/IV SYSTEM CALL LIST
… Entry address of target system call
… If system call is not selected
However,
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