Dear all,
I have a question.....

"At what position (ie., sp value) the return address is pushed when timer ISR is called (the code is compiled using SDCC)?"

Description:
I am working on a project where i need to change the order of execution between two different routines. I am using "c language with sdcc cross compiler". the switching of one routine to another happens in the ISR of timer 0. I have declared the isr as...

void timer_isr(void) interrupt 1 using 1
{
.....
.....
}

when timer 0 overflows, the control exits from routine 1 and comes to isr. here i have to change the control of execution to routine 2. I know the address of routine 2. If i load this address instead of "return address pushed on the stack when timer ISR is called", i can switch to routine 2.

The SDCC document on ISR tells that the entire Register bank 0, ACC, PSW, DPTR and return address after ISR exits. I have received the SP value from paulmon board to hyper terminal, but i couldn't get the address. Can anyone help me?

thanks & regards
veera