# Porting Rabbit 3000 code to Rabbit 4000

**URL:** <https://forums.digi.com/t/porting-rabbit-3000-code-to-rabbit-4000/9212>\
**Category:** Rabbit\
**Created:** [November 1, 2007, 4:35pm UTC](https://forums.digi.com/t/porting-rabbit-3000-code-to-rabbit-4000/9212 "2007-11-01T16:35:37Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![iknopf](https://avatars.discourse-cdn.com/v4/letter/i/45deac/32.png) [@iknopf](https://forums.digi.com/u/iknopf)\
**Post date:** [November 1, 2007, 4:35pm UTC](https://forums.digi.com/t/porting-rabbit-3000-code-to-rabbit-4000/9212/1 "2007-11-01T16:35:37Z")

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I have a program that is currently running on a Rabbit 3000 processor. I am considering moving to the Rabbit 4000. My question is, a large part of this program is written in assembly language - will this code run on the Rabbit 4000 without significant effort?