USBB17RX78K4-XXX NEC Electronics, USBB17RX78K4-XXX Datasheet - Page 36

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

This chapter describes the following items of each system calls:
[Function]:
[Remarks]:
[System call ID number]:
[Parameter]:
[Return parameter]:
[Assembler format]:
Outline of the function of the system call
Describes the function of the system call
Number particular to system call when the assembler calls the system call
Describes the name, data size, and explanation of each parameter.
A list of return values that may occur as a result of issuance of the system call. The return value is returned as a
function value of the system call in the case of the C language, and to register C in the case of the assembler.
Since no abnormal termination processing is performed for all the system calls, add abnormal termination
processing by referring to the value of the return parameter.
Describes which register is used for output parameter, and how to handle an input parameter when the system call
is issued in the assembler.
For the system call called from an interrupt handler, describes which register is used as an input parameter. The
symbols described in the assembler format have the following addresses:
[Large model]
[Small model]
The system call which can be issued from an interrupt handler uses the register bank of that time.
The following is described in the assembler format:
[Large model]
[Small model]
bnk0_b = 0FFEF3H,
bnk0_e = 0FFEFCH,
bnk0_b = 0FEF3H,
bnk0_e = 0FEFCH
Example
Example
E, UUP, VVP
E, UP, VP
bnk0_vp = 0FEF8H,
bnk0_vp = 0FFEF8H,
bnk0_d = 0FFEFDH
CHAPTER 4
RX78K/IV SYSTEM CALL LIST
bnk0_up = 0FEFAH,
bnk0_up = 0FFEFAH,
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