Analog Devices VISUALDSP++ 3.5 Manual page 324

C Run-Time Library Reference
int v2 = io_space_write(addr, 0xFF);
}
See Also
disable_interrupts, enable_interrupts, io_space_read, mode_change,
sysreg_read, sysreg_write
3-70 VisualDSP++ 3.5 C/C++ Compiler and Library Manual
/* support routine
will be called
for ADSP-219x DSPs
*/