Mirko, Crossing the 1k boundary for IXP12XX with 2k control store should be transparent for the programmer. Just remember to set the following switches correctly: -Qrevision_min=n -Qrevision_max=m The version arguments allow the compiler to generate code that will work on a range of processor versions. 1=B0; 3=C0; 5=D0. Use 3 to enable C0 support (2K microcode) in the compiler. Use 5 for the IXP1240 and the IXP1250. Use min and max to set the range of processor versions that the code will run on. Note: The loader will error if you try to load on an incorrect processor version. --eric h. -----Original Message----- From: Mirko Benz [mailto:benz@mephisto.inf.tu-dresden.de] Sent: Wednesday, March 05, 2003 7:43 AM To: ixp1200@CS.Princeton.EDU Subject: [ixp1200] MicroEngine C -> segment access? Hello, How to access the second micro store segment of the C step IXP1200 from C? Thanks, Mirko