The question is about far memory type. I use 8951RD2. I define: LX51 and AX51, use on-chip XRAM, support far memory type. The on-chip XRAM of RD2 is 1.7Kb. In listing far memory defined as HDATA. I define variable of type far 440 bytes, and it passes compiling. The listing: MODULE INFORMATION: STATIC OVERLAYABLE CODE SIZE = 3444 ---- CONSTANT SIZE = 50 ---- XDATA SIZE = ---- ---- PDATA SIZE = ---- ---- DATA SIZE = 16 24 IDATA SIZE = 28 5 BIT SIZE = 4 2 EDATA SIZE = ---- ---- HDATA SIZE = 440 ---- XDATA CONST SIZE = ---- ---- FAR CONST SIZE = ---- ---- END OF MODULE INFORMATION. But, if I define far memory 4000 bytes, it also passes compiling. HDATA SIZE = 4000 ---- (remember? 1.7Kb maximum) Why? Where are these variables fisically allocated?