Re: Differences between interrupt service routine (ISR) and a subroutine

From: James Beck <jim@xxxxxxxxxxxxxxxxxxxxxxx>
Date: Tue, 28 Nov 2006 13:36:33 -0500

In article <1164736936.337323.40270@xxxxxxxxxxxxxxxxxxxxxxxxxxxx>,
uws2003@xxxxxxxxx says...

Hi

What are the differences between ISR and a subroutine in embedded
systems, how about the following:
- interrupts are disabled by the microprocessor prior to calling the
isr

Not always true.

- isr's are always smaller

not true

- an isr cannot be written in C

definitely just wrong

- a subroutine always has arguments

nope

- the CPU flags are stored on the stack in addition to the return
address

Depends on the CPU

Thanks

No problem
.

References:
- Differences between interrupt service routine (ISR) and a subroutine
  - From: 2005

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