Hi, I just add KS8721BL functionnality to the sam7x demo. I use the olimex board and the phy is not the same as the one on the ATMEL board. so here the minor modification. in the mii.h add: #define MII_KS8721BL_ID      0x00221610 after: /* PHY ID */ #define MII_DM9161_ID     0x0181b8a0 #define MII_AM79C875_ID   0x00225540    /* 0x00225541 */ and in file SAM7_EMAC.c change line in function prvProbePHY from if( ( ( ulPHYId1 << 16 ) | ( ulPHYId2 & 0xfff0 ) ) != MII_DM9161_ID) to if( ( ( ( ulPHYId1 << 16 ) | ( ulPHYId2 & 0xfff0 ) ) != MII_DM9161_ID ) &&     ( ( ( ulPHYId1 << 16 ) | ( ulPHYId2 & 0xfff0 ) ) != MII_KS8721BL_ID )) and all should work. At least the webserver is working. regards Jonathan Dumaresq