Code Banking Example

A code banking application with the following memory map:

Memory Area	Address Range	Usage
On-Chip RAM	I:0x00–I:0xFF	Registers, bits, variables, stack, ...
External RAM	X:0x0000–X:0xEFFF	Variables too large for on-chip RAM.
ROM	C:0x0000–C:0x7FFF (common area)	Common area program and constant objects.
ROM	B0:0x8000–B3:0xFFFF (code banks)	Bank area program objects..

requires the following linker command line:

LX51 BANK0 {A.OBJ}, &
     BANK1 {B.OBJ}, &
     BANK2 {C.OBJ}, &
     BANK3 {D.OBJ} &
     BANKAREA (0x8000–0xFFFF) &
     SEGMENTS ( &
              IDATA(I:0x00-I:0xFF), &
              CODE(C:0x0000-C:0xEFFF), &
              XDATA(X:0x0000-X:0xEFFF) &
              )

Note

The address ranges for the BIT and DATA memory classes in the above linker command line are not required since the default settings cover the correct physical address ranges.