Method of setting addresses of memories

A processor implemented method of setting addresses of memories in a processing system having a plurality of memory mounting portions each for mounting a respective memory having a predetermined memory address capacity therein, the method comprising:

• selecting a memory mounting portion;
• initially storing a top address and an end addresses of the selected memory mounting portion in an associated top address register and an associated end address register, respectively;
• determining the presence or absence of memory in the selected memory mounting portion by writing a given value to addresses of the memory from the top address to the end address, and attempting a reading out of the given value from the addresses written to, wherein the presence of a memory in the selected memory mounting portion is determined by a successful reading out of the given value from all addresses written to, and wherein the absence of a memory in the selected memory mounting portion is determined by an unsuccessful reading out of the given value from all addresses written to;
• and
• if the absence of memory in the selected memory mounting portion is determined:
• then storing an address value exceeding a combined memory capacity of the system in both the top and end address registers of the selected memory mounting portion;
• wherein the above steps are performed for each memory mounting portion of the system in turn;
• wherein the respective top address initially stored for a successive memory mounting portion is the end address plus one of a next preceding memory mounting portion determined to have memory present, and wherein the end address initially stored for a successive memory mounting portion is the respective top address plus the respective predetermined memory address capacity of the memory to be mounted therein;
• and
• wherein a continuous address range is set for memories in the memory mounting portions of the system.