/*
* Macro to push the current execution context onto the stack, before the stack
* is moved to XRAM.
*/
#define portSAVE_CONTEXT()                                                                        \
{                                                                                                \
    _asm                                                                                        \
        /* Push ACC first, as when restoring the context it must be restored                    \
        last (it is used to set the IE register). */                                            \
        push    ACC                                                                                \
        /* Store the IE register then disable interrupts. */                                    \
        push    IE                                                                                \
        clr        _EA                                                                                \
        push    DPL                                                                                \
        push    DPH                                                                                \
        push    b                                                                                \
        push    ar2                                                                                \
        push    ar3                                                                                \
        push    ar4                                                                                \
        push    ar5                                                                                \
        push    ar6                                                                                \
        push    ar7                                                                                \
        push    ar0                                                                                \
        push    ar1                                                                                \
        push    PSW                                                                                \
    _endasm;                                                                                    \
        PSW = 0;                                                                                \
    _asm                                                                                        \
        push    _bp                                                                                \
    _endasm;                                                                                    \
}