Debugging ISRs

I’m working with a test shell program on an NXP LPC2138 target (ARM-7), and would like to use debug functions, and if possible the simulator. My code doesn’t use your CTL library, it’s essentially a basic, on the metal hello world in C.

Should I be able to set breakpoints and step through ISR code?

Ditto for system modules in assembler, such as startup.s? I have a specific need to step through your ISR jacketing code, VIC_irq_handler.s.

Thanks for any info.