/// <summary>
/// Returns the interrupt stack pointer. ssp is used as isp.
/// </summary>
ULO cpuGetIspAutoMap(void)
{
if (cpuGetFlagSupervisor() && !cpuGetFlagMaster())
{
return cpuGetAReg(7);
}
return cpuGetSspDirect();
}
/// <summary>
/// Sets the interrupt stack pointer. ssp is used as isp.
/// </summary>
void cpuSetIspAutoMap(ULO new_isp)
{
if (cpuGetFlagSupervisor() && !cpuGetFlagMaster())
{
cpuSetAReg(7, new_isp);
}
else
{
cpuSetSspDirect(new_isp);
}
}
ULO cpuActivateSSP(void)
{
ULO currentSP = cpuGetAReg(7);
// check supervisor bit number (bit 13) within the system byte of the status register
if (!cpuGetFlagSupervisor())
{
// we are in user mode, thus save user stack pointer (USP)
cpuSetUspDirect(currentSP);
currentSP = cpuGetSspDirect();
if (cpuGetModelMajor() >= 2)
{
if (cpuGetFlagMaster())
{
currentSP = cpuGetMspDirect();
}
}
cpuSetAReg(7, currentSP);
}
return currentSP;
}
ULO cpuGetSspAutoMap(void) {return (cpuGetFlagSupervisor()) ? cpuGetAReg(7) : cpuGetSspDirect();}
