Oki JOB60851 user manual Limitations

Chapter 4 Software Development

(4)#asm and #endasm

These two directives enclose an in-line assembly language block, which the compiler simply passes to the assembler. The sample firmware uses them in read_fifo() and write_fifo(), the functions for reading from and writing to USB controller buffers, and in extint1(), extint4(), and extint5(), the functions for switching register banks in response to an external interrupt from the USB controller.

For further details on this assembly language code, refer to the nX-8/500S Instruction Manual (Nx8_500s.pdf).

(5)__accpass

This modifier changes the function calling sequence to pass one parameter in the accumulator. Note that the compiler's /REG command line option makes this the default for all functions without an overt __noacc modifier.

(6)__noacc

This modifier overrides __accpass and the compiler's /REG command line option to pass all parameters on the stack. This is required for standard library functions, so always include the header files containing the function prototypes. It also applies to the low-level I/O functions read() and write() called by the standard library functions.

Note that incompatible __accpass and __noacc specifications between compile units produces a program that runs out of control.

4-3-9. Limitations

(1)As of August 1999, sample firmware operation has been confirmed only for the MSM66Q573 plus ML60851C combination. The ARM code is a preliminary version that does not compile.

(2)The sample firmware has been compiled and tested only with the cc665s compiler only in the small models. Other memory models have not been tested.

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