I'm trying to access external devices on a XC161. A0-A19 are active. So are CS0-CS4. ADDRSEL4 is set to 0x0400 (start at 40000h, size 4k) Writing to 0x40000 works but CS0 is activated not CS4 ??? I have no experience with this family, so I must be doing something silly... Startup file was generated by DAVE, but checked out to be correct. Writing is done by use of a pointer. Is there an other/more direct way of accessing external memory/device? Frank
Hi Frank, I checked the MACRO again and with the DAvE register viewer (There it is the right value ).You are completely right. It is definitly a problem with KEIL IDE's startup file. Thanks again - your workaround solves it completely. Stefan
The integration problems between uVision2 and DAvE have been corrected in the latest C166 V4.27 release. http://www.keil.com/update/sw/c166/4.27 Jon