# RCM4300 Series SRAM differences

**URL:** <https://forums.digi.com/t/rcm4300-series-sram-differences/10139>\
**Category:** Rabbit\
**Created:** [July 31, 2008, 1:32pm UTC](https://forums.digi.com/t/rcm4300-series-sram-differences/10139 "2008-07-31T13:32:27Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![contact22](https://avatars.discourse-cdn.com/v4/letter/c/fbc32d/32.png) [@contact22](https://forums.digi.com/u/contact22)\
**Post date:** [July 31, 2008, 1:32pm UTC](https://forums.digi.com/t/rcm4300-series-sram-differences/10139/1 "2008-07-31T13:32:27Z")

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I have ported over code from a RCM4210 to a RCM4310 but ran out of root code space with the enhancements. So I picked up a RCM4300 which has 1mb of SRAM, 512 more than the RCM4310. I still get the same error on the RCM4300 as the RCM4310. Does anyone know if there is a memory mapping problem here for the RCM4300 compiling to SRAM. I have traced down through stdbios.c and can’t see any defines that would map the memory differently from the RCM4300 to the RCM4310 yet the parts are not the same. I am using DC 10.21.

Any help with this would be greatly appreciated.